Rotary surgical cutting tool and related accessories

Abstract

To provide a surgical handpiece system having a high-speed surgical bur assembly.SOLUTION: A surgical handpiece system 10 includes a high-speed surgical bur assembly and a surgical handpiece assembly. The high-speed surgical bur assembly has a nose tube 17 and a driveshaft 24 at least partially disposed within the nose tube 17. A cutting tool 18 is coupled to a distal region of the driveshaft 24. The cutting tool 18 and the driveshaft 24 are configured to rotate relative to the nose tube 17. The surgical handpiece system 10 comprises a hub 14 and a rotatable drive chuck 34 for coupling to the nose tube 17 and the driveshaft 24. A motor is configured to rotate the rotatable drive chuck 34, the driveshaft 24, and the cutting tool 18 when the driveshaft 24 is coupled to the rotatable drive chuck 34.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Related Applications The subject patent application claims the benefit of priority of and all benefits from U.S. Provisional Patent Application No. 62 / 857,959, filed on June 6, 2019, and Provisional Patent Application No. 62 / 972,354, filed on February 10, 2020, which are hereby incorporated by reference in their entireties. filed, and claims the benefit of priority of and all benefits from Provisional Patent Application No. 62 / 972,354, filed on February 10, 2020 which are hereby incorporated by reference in their entireties. .

Background Art

[0002] High-speed bars often include a motor and separate disposable parts. The disposable parts must be coupled to the motor so that torque is transmitted from the motor through a drive shaft to rotate the cutting bar at high speed to abrade and / or wear the surface. and / or wear the surface. It is an object of the present disclosure to improve this coupling.

Summary of the Invention

[0003] The present disclosure generally relates to a surgical handpiece system. An exemplary configuration provides a surgical handpiece system having a high-speed surgical bar assembly. The high-speed surgical bar assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube. The nose tube has a proximal portion extending along an axis. The proximal portion of the nose tube has an outer surface defining a nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The high-speed surgical bar assembly also includes a drive shaft at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube. The high-speed surgical bar assembly also includes a drive shaft at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube. The high-speed surgical bar assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube. The nose tube has a proximal portion extending along an axis. The proximal portion of the nose tube has an outer surface defining a nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The nose tube has a proximal portion extending along an axis. The proximal portion of the nose tube has an outer surface defining a nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The proximal portion of the nose tube has an outer surface defining a nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The high-speed surgical bar assembly also includes a drive shaft at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube. The high-speed surgical bar assembly also includes a drive shaft at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube. The high-speed surgical bar assembly includes a drive shaft at the distal end of the drive shaft ​Also included is a cutting tool coupled to the region. The cutting tool is configured to rotate with the drive shaft relative to the nose tube. This system also includes a hub having a bore that defines a cavity for receiving a proximal portion of the nose tube of the high-speed surgical bar assembly. The surgical handpiece assembly includes a biasing member disposed within the cavity of the hub. The biasing member is configured to be received by a nose tube recess of the nose tube to restrain the depth of the nose tube of the high-speed surgical bar assembly within the cavity of the hub. The surgical handpiece assembly also includes a radial alignment member disposed within the cavity of the hub proximal to the biasing member. The radial alignment member defines a notch for receiving a protrusion to restrain the radial orientation of the nose tube relative to the hub. Another exemplary configuration provides a surgical handpiece system that includes a high-speed surgical bar assembly. The high-speed surgical bar assembly includes a nose tube that defines a lumen extending between a proximal end and a distal end of the nose tube. The high-speed surgical bar assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. The drive shaft has a proximal region that extends along a drive shaft axis. The high-speed surgical bar assembly also includes a cutting tool coupled to the distal region of the drive shaft. The cutting tool is configured to rotate with the drive shaft relative to the nose tube. This system also includes a hub having a bore that defines a cavity for receiving the proximal end of the nose tube of the high-speed surgical bar assembly and the proximal region of the drive shaft.

[0004] ​ including a surgical handpiece assembly including a hub. The surgical handpiece assembly also includes a rotatable drive chuck configured to rotate by a motor about a hub axis . The rotatable drive chuck is disposed within a cavity of the hub and is configured to rotate relative to the hub . The rotatable drive chuck defines an opening for receiving a proximal region of a drive shaft . The rotatable drive chuck includes a drive portion disposed proximal to the opening . The drive portion has at least two drive surfaces configured to engage the drive shaft in a driving direction to rotate the drive shaft . The rotatable drive chuck also includes an alignment portion disposed between the drive portion of the rotatable drive chuck and the opening. The alignment portion has an alignment edge that extends distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck . As the alignment edge extends distally from the drive portion of the rotatable drive chuck, the alignment edge tapers away from the hub axis. The drive shaft is configured to engage the alignment edge of the alignment portion of the rotatable drive chuck to orient the drive shaft in the driving direction such that the drive shaft engages at least two drive surfaces of the drive portion of the rotatable drive chuck

[0005] Yet another exemplary configuration provides a high-speed surgical burr assembly configured to cut tissue and coupled to the surgical handpiece assembly. The high-speed surgical burr assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube . The nose tube has a proximal portion extending along an axis. The proximal portion of the nose tube is configured to suppress the depth of the nose tube relative to the surgical handpiece assembly to ​​​​​​​ It has an outer surface that defines a recess for receiving a biasing member of the handpiece assembly. The nose tube includes a protrusion disposed proximal to the recess. The protrusion is configured to inhibit the radial orientation of the nose tube relative to the surgical handpiece a ssembly. The high speed surgical burr assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. The drive shaft has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. has a drive portion in a proximal region of the drive shaft for engaging a rotatable drive chuck of the surgical handpiece assembly. The high speed surgical burr assembly also includes a cutting tool coupled to a distal region of the drive shaft on an opposite side of the drive portion. The cutting tool is configured to rotate relative to the nose tube together with the drive shaft in response to rotation of the rotatable drive chuck of the surgical handpiece assembly.

[0006] Another exemplary configuration provides a high speed surgical burr assembly configured to cut tissue and coupled to a surgical handpiece assembly. The high speed surgical burr assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube. The nose tube has a proximal portion configured to be coupled to the surgical handpiece assembly. The proximal portion of the nose tube includes a protrusion configured to inhibit the radial orientation of the nose tube relative to the surgical handpiece assembly. The high speed surgical burr assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. The drive shaft has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis has a drive portion extending along the axis There is a proximal region of the bar. The proximal region of the drive shaft rotates the surgical handpiece assembly and includes a drive portion for engaging a possible drive chuck in the drive direction. The drive shaft also includes an alignment portion proximal to the drive portion of the drive shaft. The alignment portion has an outer surface that tapers towards the axis as the alignment portion extends from the drive portion to the proximal end of the drive shaft. The alignment portion engages with a rotatable drive chuck and is configured to align the drive portion in the drive direction so that the drive portion of the drive shaft engages with the rotatable drive chuck. The alignment portion defines a notch that extends distally from the proximal end of the drive shaft to reduce contact between the alignment portion of the drive shaft and the rotatable drive chuck while the alignment portion engages with the rotatable drive chuck. The high-speed surgical bar assembly also includes a cutting tool coupled to the distal region of the drive shaft on the opposite side of the proximal region of the drive shaft. The cutting tool is configured to rotate with the drive shaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical handpiece assembly and the rotatable drive chuck. The high-speed surgical bar assembly also includes a cutting tool coupled to the distal region of the drive shaft on the opposite side of the proximal region of the drive shaft. The cutting tool is configured to rotate with the drive shaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical handpiece assembly and the rotatable drive chuck. The high-speed surgical bar assembly also includes a cutting tool coupled to the distal region of the drive shaft on the opposite side of the proximal region of the drive shaft. The cutting tool is configured to rotate with the drive shaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical handpiece assembly and the rotatable drive chuck. The high-speed surgical bar assembly also includes a cutting tool coupled to the distal region of the drive shaft on the opposite side of the proximal region of the drive shaft. The cutting tool is configured to rotate with the drive shaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical handpiece assembly

[0007] Yet another exemplary configuration provides a high-speed surgical bar assembly for connection to a surgical handpiece assembly. The high-speed surgical bar assembly includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly and includes a drive shaft having a proximal end and a distal end. The high-speed surgical bar assembly also includes a nose tube having a first region that defines a lumen for at least partially receiving the drive shaft between the proximal end and the distal end. The high-speed surgical bar assembly also includes a second region that extends monolithically from the first region for coupling the drive shaft to the surgical handpiece assembly at the proximal end. The second region radially aligns the nose tube with the surgical handpiece assembly It includes an alignment function configured to align. The second region also includes a holding function configured to axially hold the nose tube in the surgical handpiece assembly. The high-speed surgical bar assembly also includes a cutting tool coupled to the drive shaft at the distal end of the drive shaft.

[0008] Another exemplary configuration provides a surgical handpiece assembly configured to be coupled to a high-speed surgical bar assembly having a nose tube and a drive shaft rotatably coupled to the nose tube. The surgical handpiece assembly includes a hub having a bore that defines a cavity for receiving a proximal portion of the nose tube. The surgical handpiece assembly also includes a biasing member disposed within the cavity of the hub. The biasing member is configured to engage the nose tube to restrain the depth of the nose tube within the cavity of the hub relative to the hub. The surgical handpiece assembly also includes a radial alignment member disposed within the cavity of the hub proximal to the biasing member. The radial alignment member defines a notch for receiving a protrusion of the nose tube to restrain the radial orientation of the nose tube relative to the hub. The radial alignment member engages the protrusion of the nose tube such that the notch can receive the protrusion of the nose tube and has an alignment wall that extends distally from the notch to radially align the nose tube.

[0009] The advantages of the present disclosure will be more readily appreciated when considered in connection with the accompanying drawings and will become better understood with reference to the following detailed description.

Brief Description of the Drawings

[0010] ​​​​​​​​​​​​​​

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DETAILED DESCRIPTION OF THE INVENTION

[0011] FIG. 1 shows a perspective view of a surgical handpiece system 10. The surgical handpiece system 10 includes a motor 12, a hub 14, and a nose tube assembly 16. The motor 12 is connected to the hub 14, and the nose tube assembly 16 is connected to the motor 12 via the hub 14. The nose tube assembly 16 includes a nose tube 17, a drive shaft 24 (see FIG. 2), and a cutting tool 18 coupled to the drive shaft 24. The motor 12 is configured to provide torque to the nose tube assembly 16 via the hub 14. Specifically, the motor 12 rotates the cutting tool 18 of the nose tube assembly 16 disposed at the distal end 21 of the nose tube assembly 16 via the hub 14. The motor 12 transmits torque to the drive shaft 24 of the nose tube assembly 16 that rotates the cutting tool 18 of the nose tube assembly 16. The motor 12 is configured to transmit torque to the cutting tool 18 via the hub 14 and the nose tube assembly 16. In some configurations, the motor 12 is configured to rotate the cutting tool 18 at a speed exceeding 50,000 revolutions per minute. The high-speed torque transmission from the motor 12 to the cutting tool 18 enables, for example, the nose tube assembly 16 to accurately and efficiently abrade the nasal cavity. The nose tube assembly 16 can also be adapted for use in the spine, nerves, and endoscopes. The hub 14 can include a variety of different configurations. The hub 14 can be straight or curved depending on the application. For example, in a curved configuration, the hub 14 can define a seamless curve of 20 degrees away from the horizontal axis 20 of the hub 14, or the hub 14 can define a straight length along the horizontal axis 20. Further, the nose tube assembly 16 can also be curved or straight depending on the application of the nose tube assembly 16.

[0012] The hub 14 can include a variety of different configurations. The hub 14 can be straight or curved depending on the application. For example, in a curved configuration, the hub 14 can define a seamless curve of 20 degrees away from the horizontal axis 20 of the hub 14, or the hub 14 can define a straight length along the horizontal axis 20. Further, the nose tube assembly 16 can also be curved or straight depending on the application of the nose tube assembly 16. can define a seamless curve of 20 degrees away from the horizontal axis 20 of the hub 14, or the hub 14 can define a straight length along the horizontal axis 20. Further, the nose tube assembly 16 can also be curved or straight depending on the application of the nose tube assembly 16. More specifically, the nose tube 17 may be curved or straight. For example, the nose tube assembly 16 may include a bend at the proximal end 22 or may include a bend at the distal end 21 of the nose tube assembly 16. The nasal application of the nose tube assembly 16 can use the bend at the distal end 21, and the spinal application of the nose tube assembly 16 can use the bend at the proximal end 22 of the nose tube assembly 16. A bushing (not shown) aligns the drive shaft 24 within the lumen 26 (see FIG. 2) of the nose tube 17 so that the drive shaft 24 does not contact the inner surface of the nose tube 17. This allows the drive shaft 24 to rotate independently of the nose tube 17 when the motor 12 transmits torque through the drive shaft 24. Shown in FIG. 1 is a curved hub 14. The curved hub 14 is different from a straight hub based on the desired surgical use of the surgical handpiece system 10. As described above, the degree to which the hub 14 and / or the nose tube assembly 16 can be bent may be affected by the surgical application. It is conceivable that the hub 14 and / or the nose tube assembly 16 are straight and no bends can be used. Specifically, the curved hub 14 may include a plurality of ball bearings (not shown) or other torque transmission mechanisms used to support rotatable components that allow the curved hub 14 to transmit torque to the nose tube assembly 16. The bearings may align shafts (not shown) interconnected by a gear set (not shown). When the motor 12 transmits torque through the drive shaft 24, the drive shaft 24 can rotate independently of the nose tube 17.

[0013] Shown in FIG. 1 is a curved hub 14. The curved hub 14 is different from a straight hub based on the desired surgical use of the surgical handpiece system 10. As described above, the degree to which the hub 14 and / or the nose tube assembly 16 can be bent may be affected by the surgical application. It is conceivable that the hub 14 and / or the nose tube assembly 16 are straight and no bends can be used. Specifically, the curved hub 14 may include a plurality of ball bearings (not shown) or other torque transmission mechanisms used to support rotatable components that allow the curved hub 14 to transmit torque to the nose tube assembly 16. The bearings may align shafts (not shown) interconnected by a gear set (not shown). The degree to which the hub 14 and / or the nose tube assembly 16 can be bent may be affected by the surgical application. It is conceivable that the hub 14 and / or the nose tube assembly 16 are straight and no bends can be used. Specifically, the curved hub 14 may include a plurality of ball bearings (not shown) or other torque transmission mechanisms used to support rotatable components that allow the curved hub 14 to transmit torque to the nose tube assembly 16. Specifically, the curved hub 14 may include a plurality of ball bearings (not shown) or other torque transmission mechanisms used to support rotatable components that enable the curved hub 14 to transmit torque to the nose tube assembly 16. The bearings may align shafts (not shown) interconnected by a gear set (not shown). rings may include a plurality of ball bearings (not shown) or other torque transmission mechanisms used to support rotatable components that allow the curved hub 14 to transmit torque to the nose tube assembly 16. The bearings may align shafts (not shown) interconnected by a gear set (not shown). Provided and torque is transmitted from the motor 12 through the hub 14 to the nose tube assembly 16 to do so.

[0014] As described above, the hub 14 is attached to the motor 12. The hub 14 may include a function that helps align and lock the hub 14 with the motor 12 of the surgical handpiece system 10. For example, the hub 14 may include a dot (not shown) corresponding to another dot (not shown) on the motor 12 such that alignment between the dots enables the hub 14 to be coupled to the motor 12 . The hub 14 may further include a visual indicator of any kind. Additionally, the hub 14 may include an anti-rotation pin (not shown) at its proximal end 22 to enable a specific orientation between the hub 14 and the motor 12 . External c-clips (not shown) and O-rings (not shown) can further assist in establishing a secure connection between the hub 14 and the motor 12 so that the motor 12 transmits torque to the nose tube assembly 16 through the hub 14. The hub 14 may also include a knurled portion (not shown). The knurled portion corresponds to a position on the hub 14 where an operator can place a finger to hold the surgical handpiece stem 10.

[0015] Figure 2 shows a cross-sectional view of the surgical handpiece system 10 taken along line 2-2 of Figure 1 . Specifically, Figure 2 shows a cross-section of the nose tube assembly 16 and the hub 14. The motor 12 is not shown in Figure 2. The nose tube assembly 16 is shown to have a drive shaft 24 that extends through a lumen 26 defined by the nose tube 17. The drive shaft 24 extends into the hub 14, and the hub 14 transmits torque to the motor ​​configured to transmit from 12 to drive shaft 24. The drive shaft 24 is the nose tip between and extending beyond the proximal and distal ends 22, 21 of the nose tube assembly 16 shown as such.

[0016] As shown in FIGS. 2 and 3, the drive shaft 24 is at least partially disposed within the lumen 26 . The drive shaft 24 also includes an alignment portion 28. The alignment portion 28 aligns the drive portion 30 of the drive shaft 24 in a direction to engage with a rotatable drive chuck 34 disposed within the hub 14 . The rotatable drive chuck 34 is disposed for alignment of the drive shaft 24 and the hub 14 of the nose tube assembly 16 and transmits torque from the motor 12 via the drive shaft 24. As will be described in more detail below, the alignment portion 28 of the drive shaft 24 is disposed at the proximal end 22 of the nose tube assembly 16 . To align the drive shaft 24 with the hub 14, the rotatable drive chuck 34 engages the leading edge 36 of the alignment portion 28 of the drive shaft 24 when the nose tube assembly 16 is pressed against the hub 14 . Specifically, the alignment portion 28 defines one or a plurality of leading edges 36 that engage one or a plurality of inclined surfaces 38 of the rotatable drive chuck 34 to align the drive portion 30 of the drive shaft 24 within the rotatable drive chuck 34 . As will be described in further detail below, the configuration of the inclined surface 38 of the rotatable drive chuck 34 and the leading edge 36 of the alignment portion 28 enables the drive shaft 24 to self-align . In other words, when the nose tube assembly 16 is pressed against the hub 14, the leading edge 36 of the alignment portion 28 engages the inclined surface of the rotatable drive chuck 30 to drive . . . shaft 24. . . As will be described in even more detail below, the configuration of the inclined surface 38 of the rotatable drive chuck 34 and the leading edge 36 of the alignment portion 28 allows the drive shaft 24 to self-align . . That is, when the nose tube assembly 16 is pressed against the hub 14, the leading edge 36 of the alignment portion 28 engages the inclined surface of the rotatable drive chuck 30 to drive . Rotate the shaft 24. This engagement and the continuous pressing of the nose tube assembly 16 against the hub 14 causes the drive portion 30 of the drive shaft 24 to engage with a drive chuck 34 that is rotatable by the drive part 30 and rotate the drive shaft 24 in a direction that enables torque transmission between the drive shaft 24 and the rotatable drive chuck 34. Regardless of the initial radial orientation of the alignment portion 28 , the configuration of the inclined surface 38 of the rotatable drive chuck 34 and the leading edge 36 of the alignment portion 28 is such that when the nose tube assembly 16 is pressed against the hub 14 , the drive portion 30 of the drive shaft 24 is ensured to be in a direction that engages with the rotatable drive chuck 34 . The self - aligning function is beneficial in certain embodiments because the drive shaft 24 is not visible when the nose tube assembly 16 is coupled to the hub 14 , and the drive shaft 24 cannot move axially within the nose tube assembly 16. Thus , the user grips the outer surface of the nose tube 17 and presses it against the hub 14 . By axial movement only, the engagement between the alignment portion 28 of the drive shaft 24 and the rotatable drive chuck 34 results in rotation of the drive shaft 24 without the user having to rotate the cutting tool 18 of the nose tube assembly 16 to obtain an appropriate orientation of the drive portion 30 of the drive shaft 24 with respect to the rotatable drive chuck 34 .

[0017] Proper alignment between the hub 14 and the drive shaft 24 can be indicated by tactile feedback . More specifically, when the leading edge 36 of the alignment portion 28 engages the inclined surface 38 of the rotatable drive chuck 34 , via the surgical handpiece system 10, for example, between the leading edge 36 and It is possible to feel tactile feedback such as vibrations from contact with the inclined surface 38. Touch sensory feedback may indicate proper alignment among the nose tube assembly 16, the hub 14, and the motor 12.

[0018] As shown in FIG. 3, when aligned in the proper orientation, the drive portion 30 of the drive shaft 24 mates with a flat surface 40 within the drive chamber 42 of the rotatable drive chuck 34. Thereby, torque can be transmitted from the motor 12 through the hub 14 to the drive shaft 24. In other words, when the drive portion 30 aligns with the flat surface 40 within the drive chamber 42 of the rotatable drive chuck 34, the motor 12 transmits torque through the hub 14 and the rotatable drive chuck 34 rotates independently of the hub 14. The bearing 44 disposed within the hub 14 assists in aligning the drive shaft 24 and the rotatable drive chuck 34 along the horizontal axis 20 of the surgical handpiece system 10. Thus, the bearing 44 enables efficient torque transmission along the horizontal axis 20 by aligning the rotatable drive chuck 34 and the drive shaft 24 within the hub 14, as well as the nose tube assembly 16 respectively.

[0019] FIG. 3 shows a partial cross-sectional view of the drive shaft 24 disposed within the hub 14, taken along line 3-3 shown in FIG. 1. Specifically, FIG. 3 shows the drive portion 30 of the drive shaft 24 aligned within the drive chamber 42 of the rotatable drive chuck 34. The bearing 44 engages with the drive shaft 24 and the rotatable drive chuck 34 to align the drive shaft 24 and the rotatable drive chuck 34 along the horizontal axis 20, and the drive shaft 24 and ​​It is shown that the drivable chuck 34, which can be called and rotated, can rotate independently of the hub 14. Due to the independent rotation of the drive shaft 24 and the drivable chuck 34 relative to the hub 14, the motor 12 can transmit torque to a cutting tool 18 such as a bar via the hub 14.

[0020] Referring to FIG. 3 again, the nose tube 17 of the nose tube assembly 16 defines a recess 48 that is disposed at the proximal end 22 of the nose tube 17 and adjacent to the bearing 44 when the nose tube assembly 16 is coupled to the hub 14. Specifically, the nose tube 17 has an outer surface 56 that defines a recess 48 for receiving a biasing member 46 such as a C-clip to suppress the depth of the nose tube assembly 16 relative to the surgical handpiece system 10. The biasing member 46 is axially held in place using the hub 14. When the nose tube assembly 16 is inserted into the hub 14, the biasing member 46 expands as the nose tube assembly 16 is inserted so that the biasing member 46 seats within the recess 48 when the nose tube assembly 16 is fully inserted into the hub 14.

[0021] The biasing member 46 is disposed within the recess 48 to hold the nose tube assembly 16 in place along the horizontal axis 20 during use of the surgical handpiece system 10. Thus, the recess 48 may also be referred to as a holding function 48, and the biasing member 46 is disposed within the holding function 48 to maintain the axial alignment of the nose tube assembly 16 and the drive shaft 24 relative to the hub 14 during use of the surgical handpiece system 10. ​​​​​​​​​​​​​​​。In other words, when the nose tube assembly 16 is pushed into the hub 14, the biasing member 4 6 is opened and grips the recess 48. The biasing member 46 functions to hold the depth of the nose tube assembly 16 relative to the hub 14 by engaging a retaining function, so the biasing member 46 is sometimes referred to as a retaining element. The biasing member 46 prevents axial movement of the nose tube assembly 16 relative to the hub 14. More specifically, the biasing member 46 prevents the nose tube assembly 16 from inadvertently separating from the hub 14 when the biasing member 46 engages the recess 48. The engagement between the biasing member 46 and the recess 48 can be overcome in response to the user applying sufficient force (e.g., by pulling) to expand the biasing member 46 from the recess 48 to separate the nose tube assembly 16 from the hub 14. As described above, the biasing member 46 helps to restrain the nose tube assembly 16 along the horizontal axis 20 relative to the hub 14. As shown in FIG. 3, the recess 48 defines a chamfered edge 50 that can be disposed adjacent to a protrusion 52 of the nose tube 17 that extends radially away from the lumen 26 of the nose tube 17 such that the biasing member 4 6 is adjacent to the protrusion 52. The chamfered edge 50 of the recess 48 can reduce the force required by the user to remove the nose tube assembly 16 from the hub 14. As shown in FIG. 3, the drive shaft 24 includes a retaining portion 27 disposed distally of the alignment portion 28 and a drive portion 30 of the drive shaft 24. The retaining portion 27 of the drive shaft 24 can be disposed within the lumen 26 of the nose tube 17. Specifically, the retaining portion 2

[0022] As described above, the biasing member 46 helps to restrain the nose tube assembly 16 along the horizontal axis 20 relative to the hub 14. As shown in FIG. 3, the recess 48 defines a chamfered edge 50 that can be disposed adjacent to a protrusion 52 of the nose tube 17 that extends radially away from the lumen 26 of the nose tube 17 such that the biasing member 4 6 is adjacent to the protrusion 52. The chamfered edge 50 of the recess 48 can reduce the force required by the user to remove the nose tube assembly 16 from the hub 14. can define a chamfered edge 50 that is disposed adjacent to a protrusion 52 of the nose tube 17 that extends radially away from the lumen 26 of the nose tube 17 such that the biasing member 4 6 is adjacent to the protrusion 52. The chamfered edge 50 of the recess 48 can reduce the force required by the user to remove the nose tube assembly 16 from the hub 14. can reduce the force required by the user to remove the nose tube assembly 16 from the hub 14.

[0023] As shown in FIG. 3, the drive shaft 24 includes a retaining portion 27 disposed distally of the alignment portion 28 and a drive portion 30 of the drive shaft 24. The retaining portion 27 of the drive shaft 24 is disposed within the lumen 26 of the nose tube 17. Specifically, the retaining portion 2 7 of the drive shaft 24 can be disposed within the lumen 26 of the nose tube 17. Specifically, the retaining portion 2 7 extends partially into the nose tube assembly 16 and defines a lumen 26 to restrain the drive shaft 24 against the nose tube 17 by means of a shelf 33 on the inner surface of the nose tube 17. In some configurations, as shown in FIG. 3, a bearing can be inserted between the shelf 33 and the holding portion 27 of the drive shaft 24. The holding portion 27 defines a diameter 29 that is larger than the diameter 31 of the lumen 26 to enable the holding portion 27 to restrain the drive shaft 24 against the nose tube assembly 16. This configuration prevents the drive shaft 24 from being axially removed distally from the nose tube 17. In one configuration, the relative diameter of the cutting tool 18 with respect to the lumen 26 and / or the distal bushing 35 (see FIG. 2) coupled to the distal end 21 of the nose tube 17 prevents the drive shaft 24 from being axially removed proximally from the nose tube 17.

[0024] Referring to FIGS. 4 - 6, a partial perspective view of the nose tube assembly 16 and the rotatable drive chuck 34 is shown. FIG. 4 shows a partial perspective exploded view of the nose tube assembly 16 and the hub 14 of the surgical handpiece system 10. FIG. 4 is shown as exploded along a horizontal axis 20, with the nose tube assembly 16 and the hub 14 being spaced apart along the horizontal axis 20. Specifically, FIG. 4 shows an exploded perspective view of the nose tube assembly 16 having a protrusion 52 that extends radially from a surface 56. FIG. 5 shows a partial perspective view of the nose tube assembly 16 removed from the hub 14. FIG. 6 shows a recess 48 and a protrusion 52 on the A partial perspective view of the nose tube assembly 16 defining the chuck 34 is shown.

[0025] Referring to FIG. 4, the hub 14 has a proximal end 62 and a distal end 60 opposite the proximal end 62. The hub 14 has an inner surface defining a bore 58 that extends from the distal end 60 to the proximal end 62. The inner surface also defines a channel 54 that communicates with the bore 58 extending from the distal end 60 to the proximal end 62. The protrusion 52 of the nose tube 17 is adapted to radially align the nose tube 17 as the nose tube assembly 16 is inserted into the bore 58 of the hub 14. In this way, the protrusion 52 functions as a radial alignment feature 52 of the nose tube 17. Stated another way, the protrusion 52 functions as a keyed alignment feature 52 and the protrusion 52 mates with the channel 54 defined by the hub 14. The channel 54 is sized to receive the protrusion 52 such that the radial movement of the nose tube 17 when the channel 54 receives the protrusion 52 is reduced. By dampening this radial movement, it becomes possible to accurately couple the nose tube assembly 16 to the hub 14. In this way, the protrusion 52 slides within the channel 54 to radially align the nose tube 17 relative to the hub 14. There can be two channels 54 and two protrusions 52, and the channels 54 and protrusions 52 are diametrically spaced from each other across the longitudinal axis. In another configuration, there can be two channels 54 and one protrusion 52 such that the hub 14 allows the nose tube assembly 16 to be coupled to the hub 14 in two different orientations. Such a configuration can be useful in applications where the hub 14 and / or the nose tube assembly 1 ... ... ... ... ... ... 6 can be advantageous when using the bent part as described above.

[0026] As described, the protrusion 52 extends radially from the nose tube 17. Specifically, the protrusion 52 extends perpendicularly from the surface 56 of the nose tube 17. The surface extending from 56 of the nose tube 17 allows the protrusion 52 to engage with the channel 54 defined by the hub 14 so that the radial movement of the protrusion 52 within the channel 54, for example, prevents the nose tube 17 from rotating relative to the hub 14. The engagement of the protrusion 52 within the channel 54 also helps to roughly align the drive portion 30 of the drive shaft 24 within the drive chamber 42 of the rotatable drive chuck 34. In this way, the protrusion 52 provides efficient and accurate alignment. alignment. alignment. alignment.

[0027] The protrusion 52 extends from the surface 56 of the nose tube 17 to the peak 66. The peak 66 defines the height of the protrusion 52. The height of the protrusion 52 can be based on the dimensions of the hub 14 . The peak 66 of the protrusion 52 can be formed from at least one first inclined surface 72. As will be described in more detail, the protrusion 52 can also be formed from two first and second inclined surfaces 72, 74. The peak 66 can extend from the first inclined surface 72 to the second inclined surface 74 . can.

[0028] The first inclined surface 72 can extend from the chamfered edge 50 of the recess 48 to the peak 66 of the protrusion 52. The second inclined surface 74 can be arranged along the alignment portion 28 of the drive shaft 24 and can extend to the peak 66 of the protrusion 52. The first and second inclined surfaces 72, 74 can also reach a peak at the peak 66 of the protrusion 52 where the first and second inclined surfaces 72, 74 reach a peak at the peak 66 of the protrusion 52 As such, the opposite slopes can be defined. The slopes of the first and second inclined surfaces 72, 74 The angles forming the slopes vary or can be equal based on the optimal extension and operation of the protrusion 52 when it slides within the channel 54. In other words, the peak 66 extends between the first and second inclined surfaces 72, 74 and can interconnect the first and second surfaces 72, 74 that define the height of the protrusion 52. The first and second inclined surfaces 72 , 74 also help enable the protrusion 52 to slide into the channel 54 of the hub 14. The first and second inclined surfaces 72, 74 facilitate assembly by reducing the frictional force during the sliding of the protrusion 52 through the channel 54. Further, the peak 66 can define a radius between the first and second inclined surfaces 72, 74. For example, the peak 66 can be rounded between the first inclined surface 72 and the second inclined surface 74. The radius of the peak 66 can be determined based on the optimal sliding parameters of the protrusion 52 within the channel 54 . Thus, the radius of the peak 66 can be formed to fit within the channel 54 defined by the hub 14 . Other shapes of the protrusion 52 are also conceivable.

[0029] As described above, the protrusion 52 is disposed adjacent to the recess 48. Specifically, in a particular configuration, the first inclined surface 72 is formed near the chamfered edge 50 of the recess 48. The holding (shown as a recess) of the nose tube assembly 16 and the radial alignment function (shown as a protrusion) 48, 52 can both be arranged adjacent to each other . Since the protrusion 52 is disposed adjacent to the recess 48, the nose tube assembly 16 When coupled to the hub 14, the biasing member 46 abuts against the protrusion 52 on the nose tube 17. To maintain alignment during insertion, the protrusion 52 defines the height of the peak 66 relative to the horizontal axis 20, and the recess 48 is defined such that the distance to the horizontal axis 20 is less than the height of the peak 66. Since the height of the peak 66 is greater than the distance from the biasing member 46 to the horizontal axis 20, the protrusion 52 can properly engage and slide within the channel 54 formed in the hub 14. In another configuration, if the recess 48 is defined such that the distance from the horizontal axis 20 is greater than the height of the peak 66, the peak 66 will not engage the channel 54, and rotational misalignment between the nose tube 17 and the hub 14 can be introduced during use of the surgical handpiece system 10. Thus, with the distance from the recess 48 to the horizontal axis 20 being less than the height of the peak 66, the protrusion 52 allows the retention feature 48 to maintain axial alignment between the function of the hub 14 and the nose tube assembly 16, and thus the drive shaft 24, while allowing rotational alignment between the nose tube 17 and the hub 14 during use of the surgical handpiece system 10.

[0030] It may be useful to understand the nose tube 17 from the perspective of a first region 84 and a second region 86 (see FIGS. 2 and 3). The first region 84 can represent a majority of the length of the nose tube 17, while the second region 86 can be the portion of the nose tube 17 that interacts with the hub 14. In a particular configuration, both the first region 84 and the second region 86 can be formed from a metallic material such as stainless steel. The second region 86 is single Thus, with the distance from the recess 48 to the horizontal axis 20 being less than the height of the peak 66, the protrusion 52 allows the retention feature 48 to maintain axial alignment between the function of the hub 14 and the nose tube assembly 16, and thus the drive shaft 24, while allowing rotational alignment between the nose tube 17 and the hub 14 during use of the surgical handpiece system 10.

[0031] It may be useful to understand the nose tube 17 from the perspective of a first region 84 and a second region 86 (see FIGS. 2 and 3). The first region 84 can represent a majority of the length of the nose tube 17, while the second region 86 can be the portion of the nose tube 17 that interacts with the hub 14. In a particular configuration, both the first region 84 and the second region 86 can be formed from a metallic material such as stainless steel. The second region 86 is single It can extend monolithically from the first region 84 of a piece of metal stock. In other words, the nose tube 17, which includes both the first region 84 and the second region 86, can be formed from a single piece of metal stock. The second region 86 can include a radial alignment function 52 and an axial retention function 48 for axially retaining the nose tube assembly 16 in the surgical handpiece system 10. The alignment and retention functions 52, 48 can be formed from the metal material forming the first and second regions 84, 86, and thus the alignment function 52 and the retention function 48 can be machined from the same piece of metal stock used to machine the first region 84 of the nose tube 17.

[0032] Referring to FIGS. 7 and 8, the proximal portion of the drive shaft 24 is shown. FIG. 7 shows a perspective view of the alignment portion 28 including the front edge 36, the retaining portion 27, and the drive portion 30. FIG. 8 shows a front view of the proximal portion of the drive shaft 24. Specifically, FIG. 8 shows a front view of the alignment portion 28 of the drive shaft 24.

[0033] In one exemplary configuration of the assembly, the user grasps the nose tube 17 of the nose tube assembly 16. The user partially inserts the nose tube assembly 16 into the bore 58 of the hub 14. Next, the user aligns the protrusion 52 of the nose tube 17 with the channel 54 of the hub 14 and continues to press the nose tube assembly 16 toward the hub 14. The engagement between the protrusion 52 and the channel 54 radially aligns the nose tube 17 with the hub 14. When the proximal end of the nose tube 17 abuts the biasing member 46, the biasing member ​​​​​​​​The material 46 expands to accommodate the nose tube 17. The nose tube assembly 1 When the nose tube assembly 16 is continuously pressed toward the hub 14, the biasing member 46 is received by the recess 4 8 of the nose tube 17. When the recess 48 receives the biasing member 46, the nose tube 17 and the remaining portion of the nose tube assembly 16 are axially held relative to the hub 14 .

[0034] Before the recess 48 receives the biasing member 46, the leading edge 3 6 of the alignment portion 28 of the drive shaft 24 is adjacent to the inclined surface 38 of the rotatable drive chuck 34, and thus the drive portion 30 of the drive shaft 24 is cammed in the direction of engagement with the rotatable drive chuck 34 . When the recess 48 receives the biasing member 46, the drive shaft 24 is received in the drive chamber 4 2 of the rotatable drive chuck 34 with the drive portion 30 of the drive shaft 24 adjacent to the plane 40 of the rotatable drive chuck 34, and is cammed in the direction of rotation together with receiving torque from the rotatable drive chuck 34 . When the nose tube assembly 16 is first introduced into the hub 14 (i.e., before camming), depending on the initial radial orientation of the drive shaft 24, the leading edge 3 6 of the alignment portion 28 can first contact the inclined surface 38 of the rotatable drive chuck 34 at different axial positions of the nose tube 17 relative to the hub 14. If the initial radial orientation of the drive shaft 24 is already in the orientation required for the drive portion 30 of the drive shaft 24 to be received in the drive chamber 42 and engage with the rotatable drive chuck 34, the leading edge 36 of the alignment portion 28 will not contact the inclined surface 38 of the rotatable drive chuck 34 .

[0035] ​​​​​​ The axial position of the drive shaft 24 relative to the rotatable drive chuck 34 is maintained by the biasing member 46 and the axial retention of the nose tube 17 to the hub 14 via the recess 48. That is, the drive shaft 24 is axially retained relative to the nose tube 17, so the axial position of the drive shaft 24 relative to the hub 14 and the rotatable drive chuck 34 is tied to the axial position of the nose tube 17 relative to the hub 14 and the rotatable drive chuck 34. The nose tube 17 is held by the biasing member 46 until the user pulls the nose tube assembly 16 relative to the hub 14 with sufficient force to overcome the biasing member 46 by expanding the biasing member 46. As described above, the alignment portion 28 of the drive shaft 24 defines a leading edge 36 that helps align the drive portion 30 of the drive shaft 24 within the drive chamber 42 of the rotatable drive chuck 34. When the nose tube assembly 16 is inserted into the bore 58 of the hub 14, the leading edge 36 engages the inclined surface 38 of the drive chamber 42 within the rotatable drive chuck 34 to align the drive portion 30 of the drive shaft 24 within the drive chamber 42 of the rotatable drive chuck 34. The leading edge 36 engages the inclined surface 38 to convert the insertion force into a rotational force and provide alignment between the drive portion 30 of the drive shaft 24 and the rotatable drive chuck 34. Although described as a single leading edge 36, the alignment portion 28 of the drive shaft 24 may include one or more leading edges 36.

[0036] As described above, the alignment portion 28 of the drive shaft 24 defines a leading edge 36 that helps align the drive portion 30 of the drive shaft 24 within the drive chamber 42 of the rotatable drive chuck 34. When the nose tube assembly 16 is inserted into the bore 58 of the hub 14, the leading edge 36 engages the inclined surface 38 of the drive chamber 42 within the rotatable drive chuck 34 to align the drive portion 30 of the drive shaft 24 within the drive chamber 42 of the rotatable drive chuck 34. The leading edge 36 engages the inclined surface 38 to convert the insertion force into a rotational force and provide alignment between the drive portion 30 of the drive shaft 24 and the rotatable drive chuck 34. Although described as a single leading edge 36, the alignment portion 28 of the drive shaft 24 may include one or more leading edges 36. engages the inclined surface 38 to convert the insertion force into a rotational force and provide alignment between the drive portion 30 of the drive shaft 24 and the rotatable drive chuck 34. Although described as a single leading edge 36, the alignment portion 28 of the drive shaft 24 may include one or more leading edges 36.

[0037] FIG. 6 shows a leading edge 36 defined between at least two curved surfaces 80 defined on the alignment portion 28 of the drive shaft 24. The curved surfaces 80 that interconnect to define the leading edge 36 ​​​​​​The leading edge can be asymmetric across the horizontal axis 20. The curved surface 80 connects to form the tip 82 of the alignment portion 28 As shown in FIGS. 7 and 8, the tip 82 resembles a parallelogram. As described above, the rotatable drive chuck 34 rotates independently of the hub 14. When the protrusion 5 2 is inserted into the channel 54, the alignment portion 28 engages with the inclined surface 38 of the rotatable drive chuck 34 to align the drive portion 30 in the drive chamber 42. Specifically, the leading edge 36 contacts the inclined surface 38, causing a cam rotation of the drive shaft 24 and ensuring proper alignment of the drive portion 30 in the drive chamber 42. Thus, the leading edge 36 further assists in aligning the drive portion 30 of the drive shaft 24 with the flat surface 40 in the drive chamber 42, and accurately transmits torque to the cutting tool 18 disposed at the distal end 21 of the nose tube assembly 16 from the motor 12.

[0038] Referring to FIGS. 9-25, another configuration of the surgical handpiece system 100 is shown. It should be understood that the configuration of the surgical handpiece system 10 described above may include elements similar to those of the surgical handpiece system 100 described below, and vice versa.

[0039] As shown in FIG. 9, the surgical handpiece system 100 includes a high-speed surgical bur assembly 102 (FIG. 10) and a surgical handpiece assembly 104 (FIG. 14). Similar to the configuration of the surgical handpiece system 10 shown in FIGS. 1-8, the surgical handpiece system 100 may also include a motor (not shown) configured to be coupled to the surgical handpiece assembly 104 to provide torque to the surgical handpiece system 100.

[0040] Referring to FIG. 11, a cross-section of one configuration of the high-speed surgical bar assembly 102 is shown. The high-speed surgical bar assembly 102 includes a nose tube 106. The nose tube 106 defines a lumen extending between the proximal and distal ends of the nose tube 106. At least the proximal portion 108 of the nose tube 106 extends along the axis AX. The nose tube 106 does not extend axially along the entire length of the nose tube 106 and may include bends such as the distal bend of the nose tube 106 shown in FIG. 1 1. The bend can assist the user in positioning the distal end of the nose tube 106 at a specific advantageous position during surgery.

[0041] The high-speed surgical bar assembly 102 further includes a drive shaft 110 disposed at least partially within the lumen of the nose tube 106. The drive shaft 110 is configured to rotate relative to the nose tube 106. The proximal region 112 of the drive shaft 110 is configured to engage with a surgical handpiece assembly 104, as will be described in more detail below. The high-speed surgical bar assembly 102 further includes a cutting tool 114 coupled to the distal region of the drive shaft 110. The cutting tool 114 is configured to rotate with the drive shaft 110 relative to the nose tube 10 6. In one configuration, the cutting tool 114 is a bar. In other configurations, the cutting tool 114 includes another rotating tool configured to abrade tissue.

[0042] The high-speed surgical bar assembly 102 can include bushings 116, 118, 120 to facilitate relative rotation between the drive shaft 110 and the nose tube 106. The proximal bushing 116 is coupled to the nose tube 106. The distal bushing 114 may be disposed at least partially within the lumen of the distal bushing 114 and around the drive shaft 110. The nut 118 is coupled to the nose tube 106 and is disposed within and around the lumen of the nose tube 106. The center bushing 120 may be disposed at least partially around the drive shaft 110. is disposed within the lumen between the proximal bushing 116, 120 and the distal bushing 116, 120. 10, the drive shaft 110 within the lumen of the nose tube 106 and the nose tube 106 In one configuration, the center bushing 120 can be In another configuration, the proximal and distal bushings 116, 118 are , holds a central bushing 120 within the lumen of the nose tube 106. The central bushing 120 is disposed at the bend of the nose tube 106 and the central bushing 120. The proximal and distal braces are held within the lumen of the nose tube 106 by corresponding bends. The bushings 116, 118 also couple the drive shaft 110 to the nose tube 106. In one configuration, the proximal region 112 of the drive shaft 110 may , including a retaining portion 122 proximal to the proximal bushing 116. The retaining portion 122 of the region 112 retains the distal drive shaft relative to the nose tube 106. The outer diameter of the proximal bushing 116 is greater than the inner diameter of the proximal bushing 116 to prevent movement of the proximal bushing 110. The cutting tool 114 rotates the drive shaft 110 in a proximal direction relative to the nose tube 106. To prevent this, the distal bushing 118 may have an outer diameter that is larger than its inner diameter. In this configuration, the drive shaft 110 is otherwise coupled to the nose tube 106 to provide the drive. Enable relative rotation between the drive shaft 110 and the nose tube 106, and the drive shaft 1 Prevent axial movement between 10 and the nose tube 106.

[0043] Referring to FIG. 12, the proximal portion 108 of the nose tube 106 has an outer surface. The outer surface is , engage with the surgical handpiece assembly 104 to define a recess 124 for suppressing the depth of the nose tube 106 relative to the surgical handpiece assembly 10 4. The outer surface of the proximal portion 108 of the nose tube 106 defines a proximal shoulder 126 that defines the proximal end of the recess 124 and a distal shoulder 128 that defines the distal end of the recess 124. The proximal shoulder and either or both of the distal shoulders 126, 128 can be tapered. The nose tube 106 can include a protrusion 130 disposed proximal to the recess 124. The protrusion 130 is configured to suppress the radial orientation of the nose tube 106 relative to the surgical handpiece assembly 104. The protrusion 130 can extend proximally substantially parallel to the axis AX. The proximal end of the protrusion 130 can include a rounded surface 132. The protrusion 130 of the proximal portion 108 of the nose tube 106 can include a flat surface 344 that is parallel to the axis AX of the proximal portion 108 of the nose tube 106. The rounded flat surfaces 132, 134 of the protrusion 130 can assist in the engagement between the nose tube 106 and the surgical handpiece assembly 104. The engagement between the nose tube 106 and the surgical handpiece assembly 104 will be described in more detail below. In the configuration shown in FIG. 12, the nose tube 106 includes two protrusions 130, and the surgical handpiece assembly 10 4. bly 104 will be described in more detail below. The configuration shown in FIG. 12 shows that the nose tube 106 includes two protrusions 130, and the surgical handpiece assembly 10 4. Suppress the radial orientation of the nose tube 106 relative to the burr 104. Instead, a single protrusion 130 can be used to suppress the radial orientation of the nose tube 106 relative to the surgical handpiece assembly 104. It is contemplated that more than two protrusions 130 can be used to suppress the radial orientation of the nose tube 106 relative to the surgical handpiece assembly 104.

[0044] Referring to FIG. 13, the proximal region 112 of the drive shaft 110 is rotatable about the axis AX of the proximal portion 108 of the nose tube 106. The proximal region 11 2 of the drive shaft 110 includes a drive portion 136 proximal to the retaining portion 1 22 for engaging the surgical handpiece assembly 104 in the driving direction. The drive portion 136 can include two or more drive surfaces 138 for engaging the surgical handpiece assembly 104. The drive surfaces 138 can be flat and parallel to the axis AX.

[0045] The proximal region 112 of the drive shaft 110 can also include an alignment portion 140 proximal to the drive portion 136 of the drive shaft 110. The alignment portion 140 has an outer surface that tapers towards the axis AX since the alignment portion 140 extends from the drive portion 136 of the drive shaft 110 to the proximal end. The alignment portion 140 is configured to engage the surgical handpiece assembly 104 to align the drive portion 1 36 in the driving direction. In the configuration shown in FIG. 13, the alignment portion 14 0 includes a proximal edge 142 adjacent to the proximal end of the proximal region 112 of the drive shaft 110 for engaging the surgical handpiece assembly 104. In other configurations, the alignment portion 140 is configured to engage the surgical handpiece assembly 104 to align the drive portion 1 36 in the driving direction. In the configuration shown in FIG. 13, the alignment portion 14 0 includes a proximal edge 142 adjacent to the proximal end of the proximal region 112 of the drive shaft 110 for engaging the surgical handpiece assembly 104. In other configurations, the alignment portion 140 , may include a flat or rounded surface instead of the proximal edge 142. The alignment portion 140 is configured to reduce contact between the alignment portion 140 of the drive shaft 110 during engagement and the surgical handpiece assembly 104 by defining a notch 14 4 that extends distally from the proximal end of the drive shaft 110. By reducing the amount of contact during engagement, potential jamming during engagement due to multiple contact points can be reduced. In other configurations, the alignment portion 140 may not define a notch 144.

[0046] In the configuration shown in FIG. 13, the proximal region 112 of the drive shaft 110 is disposed outside the lumen of the nose tube 106 and proximal to the proximal portion 108 of the nose tube 106. In other configurations, the proximal region 112 of the drive shaft 110 may be at least partially within the lumen of the nose tube 106 or distal to the proximal portion 108 of the nose tube 106. The engagement between the proximal region 112 of the drive shaft 110 and the surgical handpiece assembly 10 4 will be described in more detail below.

[0047] In another configuration shown in FIGS. 27-28, the alignment portion 140 of the drive shaft 110 may include a proximal surface 194 disposed proximal to the proximal edge 142, such that after the drive portion 136 is aligned in the drive direction, the proximal edge 142 is prevented from engaging the rotatable drive chuck 172 of the surgical handpiece assembly 104. The proximal surface 194 may include a plane perpendicular to the axis AX. In other configurations the proximal surface 194 may include a rounded surface.

[0048] Referring to FIGS. 15 and 16, the surgical handpiece assembly 104 includes a hub 146 comprises. The hub 146 has a bore 148 that defines a cavity 150 for receiving at least a portion of the high-speed surgical bar assembly 102. Specifically, the cavity 150 is configured to receive at least the proximal portion 108 of the nose tube 106 of the high-speed surgical bar assembly 102 and the proximal region 112 of the drive shaft 110. The proximal portion of the hub 146 can be configured to be coupled to a motor housing (not shown) that includes a motor, similar to the motor 12 that is coupled to the hub 14 in the configuration shown in FIG. 1. The surgical handpiece assembly 104 further comprises a biasing member 152 disposed within the cavity 150 of the hub 146. The biasing member 152 can be a C-clip. The bore 148 of the hub 146 can define a recess 154 that communicates with the cavity 150. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. and at least the proximal portion 108 of the nose tube 106 of the high-speed surgical bar assembly 102 and the proximal region 112 of the drive shaft 110. The proximal portion of the hub 146 can be configured to be coupled to a motor housing (not shown) that includes a motor, similar to the motor 12 that is coupled to the hub 14 in the configuration shown in FIG. 1. The proximal portion of the hub 146 can be configured to be coupled to a motor housing (not shown) that includes a motor, similar to the motor 12 that is coupled to the hub 14 in the configuration shown in FIG. 1. The proximal portion of the hub 146 can be configured to be coupled to a motor housing (not shown) that includes a motor, similar to the motor 12 that is coupled to the hub 14 in the configuration shown in FIG. 1. The proximal portion of the hub 146 can be configured to be coupled to a motor housing (not shown) that includes a motor, similar to the motor 12 that is coupled to the hub 14 in the configuration shown in FIG. 1.

[0049] The surgical handpiece assembly 104 further comprises a biasing member 152 disposed within the cavity 150 of the hub 146. The biasing member 152 can be a C-clip. The bore 148 of the hub 146 can define a recess 154 that communicates with the cavity 150. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The surgical handpiece assembly 104 further comprises a biasing member 152 disposed within the cavity 150 of the hub 146. The biasing member 152 can be a C-clip. The bore 148 of the hub 146 can define a recess 154 that communicates with the cavity 150. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The surgical handpiece assembly 104 further comprises a biasing member 152 disposed within the cavity 150 of the hub 146. The biasing member 152 can be a C-clip. The bore 148 of the hub 146 can define a recess 154 that communicates with the cavity 150. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The recess 154 defined by the bore 148 of the hub 146 is configured to receive the biasing member 152. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The bore 148 of the hub 146 can have a distal shoulder 156 that defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The distal shoulder 156 prevents the biasing member 152 from exiting the recess 154 of the hub 146 in the distal direction. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. When the high-speed surgical bar assembly 102 is received by the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The biasing member 152 is received by the recess 124 of the nose tube 106. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. The biasing member 152 is configured to engage one or both of the proximal and distal shoulders 126, 128 of the recess 124 of the nose tube 106 to suppress the depth of the nose tube 106 of the high-speed surgical bar assembly 102 within the cavity 150 of the hub 146 with respect to the hub 146. It can be. The biasing member 152 has tapered surfaces 158, 160 at its proximal or distal end, and the engagement between the biasing member 152 and the nose tube 106 can be assisted.

[0050] Refer to FIGS. 18 - 20. The surgical handpiece assembly 104 may also include a radial alignment member 162 disposed within a cavity 150 of a hub 146 proximal to the biasing member 15 2. The radial alignment member 162 can be press - fit into the cavity 150 of the hub 146 so that relative movement between the hub 146 and the radial alignment member 162 does not occur. As long as relative movement between the radial alignment member 16 2 and the hub 146 is not allowed, it is conceivable that the radial alignment member 16 2 and the hub 146 can be coupled to each other in another way.

[0051] The radial alignment member 162 defines a notch 16 4 for receiving a protrusion 130 of the nose tube 106 to suppress the radial orientation of the nose tube 106 with respect to the hub 146. In the configuration shown in FIGS. 18 - 20, the radial alignment member 162 defines four notches 164 that are circumferentially spaced apart at equal angles from each other such that each notch 164 is 90 degrees away from an adjacent notch 164. It is conceivable that three or fewer notches 164 can be used to receive the protrusion 130 of the nose tube 106 to suppress the radial orientation of the nose tube 106 with respect to the hub 146. It is also conceivable that five or more notches 164 can be used to receive the protrusion 130 of the nose tube 106 to suppress the radial orientation of the nose tube 106 with respect to the hub 14 6. Further, the spacing between the notches 164 is non - uniform and arranged circumferentially 6. It is also conceivable that five or more notches 164 can be used to receive the protrusion 130 of the nose tube 106 to suppress the radial orientation of the nose tube 106 with respect to the hub 14 6. Further, the spacing between the notches 164 is non - uniform and arranged circumferentially It is conceivable that it can be arranged at any position. The number of notches 164 can determine the number of possible radial orientations of the nose tube 106 with respect to the hub 146. Furthermore, it is understood that the spacing between the notches 164 can determine how far apart the radial orientations are. Allowing for multiple orientations can be particularly advantageous when the nose tube 106 uses a bend. The bend can be differently oriented with respect to the surgical handpiece assembly 104 based on the notches 164 of the radial alignment member 162 receiving the protrusions 130 of the nose tube 106. Furthermore, the spacing between the notches 164 can determine how far apart the radial orientations are. Allowing for multiple orientations can be particularly advantageous when the nose tube 106 uses a bend. The bend can be differently oriented with respect to the surgical handpiece assembly 104 based on the notches 164 of the radial alignment member 162 receiving the protrusions 130 of the nose tube 106. 4. 4 can be differently oriented.

[0052] The radial alignment member 162 can have an alignment wall 166 that extends distally from the notch 164 to engage with the protrusion 130 of the nose tube 106. The alignment wall 166 can radially position the nose tube 106 during engagement to allow the notch 164 to receive the protrusion 130 of the nose tube 106 when the protrusion 130 is not yet radially aligned with the notch 164 of the radial alignment member 162. Two alignment walls 166 can be used for each notch 164 of the radial alignment member 162. One on each side. Each of the two alignment walls 166 can taper inwardly towards the notch 164 such that contact between the alignment wall 166 of the radial alignment member 162 and the protrusion 130 of the nose tube 106 when the nose tube 106 is axially pushed into the hub 146 causes the protrusion 130 to be oriented into the notch 164 rather than relative rotation between the nose tube 106 and the hub 146. In a configuration where the radial alignment member 162 includes multiple alignment walls 166, the consecutive alignment walls 166 between the notches 164 can taper in opposite directions. The consecutive alignment walls 166 can also have an alignment wall 166 that extends distally from the notch 164 to engage with the protrusion 130 of the nose tube 106. The alignment wall 166 can radially position the nose tube 106 during engagement to allow the notch 164 to receive the protrusion 130 of the nose tube 106 when the protrusion 130 is not yet radially aligned with the notch 164 of the radial alignment member 162. The alignment wall 166 can radially position the nose tube 106 during engagement to allow the notch 164 to receive the protrusion 130 of the nose tube 106 when the protrusion 130 is not yet radially aligned with the notch 164 of the radial alignment member 162. Two alignment walls 166 can be used for each notch 164 of the radial alignment member 162. One on each side. Each of the two alignment walls 166 can taper inwardly towards the notch 164 such that contact between the alignment wall 166 of the radial alignment member 162 and the protrusion 130 of the nose tube 106 when the nose tube 106 is axially pushed into the hub 146 causes the protrusion 130 to be oriented into the notch 164 rather than relative rotation between the nose tube 106 and the hub 146. In a configuration where the radial alignment member 162 includes multiple alignment walls 166, the consecutive alignment walls 166 between the notches 164 can taper in opposite directions. The consecutive alignment walls 166 can also taper inwardly towards the notch 164 such that contact between the alignment wall 166 of the radial alignment member 162 and the protrusion 130 of the nose tube 106 when the nose tube 106 is axially pushed into the hub 146 causes the protrusion 130 to be oriented into the notch 164 rather than relative rotation between the nose tube 106 and the hub 146. In a configuration where the radial alignment member 162 includes multiple alignment walls 166, the consecutive alignment walls 166 between the notches 164 can taper in opposite directions. In a configuration where the radial alignment member 162 includes multiple alignment walls 166, the consecutive alignment walls 166 between the notches 164 can taper in opposite directions. The consecutive alignment walls 166 can also Instead of arranging the protrusion 130 of the nose tube 106 in the notch 164 of the radial alignment member 162 in the radial direction, the edges 168 can be collectively formed to reduce the possibility that the protrusion 130 gets stuck in the radial alignment member 162. The configuration in which the protrusion 130 has a rounded surface 132 further helps to reduce jamming with the radial alignment member 162.

[0053] As shown in FIG. 18, the radial alignment member 162 can also include one or more flat surfaces 170 to further define each notch 164. The flat surface 170 of the radial alignment member 162 can engage with the flat surface 134 of the protrusion 130 of the nose tube 106 to prevent relative rotation between the nose tube 106 and the hub 146 when the protrusion 130 is received in the notch 164. When relative rotation between the nose tube 106 and the hub 146 is prevented, axial movement between the nose tube 106 and the hub 146 due to relative rotation is also prevented.

[0054] In the configuration shown in FIG. 20, the radial alignment member 162 helps the distal shoulder 156 of the recess 154 of the hub 146 to hold the biasing member 152 in the recess 154 of the hub 146. As described above, the distal shoulder 156 prevents the biasing member 152 from exiting the recess in the distal direction. With the radial alignment member 162 disposed immediately proximal to the biasing member 152, the radial alignment member 162 forms a proximal shoulder of the recess 154 to prevent the biasing member 152 from exiting the recess 154 in the proximal direction. In other configurations, the bore 148 of the hub 146 can include a proximal shoulder (not shown) to define the proximal end of the recess 154, and the radial alignment member 162 can be disposed proximal to the proximal shoulder. ​​​​​​​​​​​​​​​​

[0055] In some configurations, the biasing member 152 is configured to bias the nose tube 106 toward the cavity 1 of the hub 146. 50 so that the protrusions of the nose tube 106 fit into the notches 164 of the radial alignment members 162. When pushing the riser 130 in, the distal shoulder 156 of the hub 146 and the nose tube 1 06. The protrusion 130 is configured to engage the proximal shoulder 126 of the notch 164. Thus, when already partially received, the biasing member 152 and the shoulder 126, 56 continues to engage until engagement is stopped or until protrusion 130 contacts the proximal surface of notch 164. 2. Slide the protrusion 130 into the notch 164 until it is adjacent and fully received by the notch 164. can be pushed deeper.

[0056] As shown in FIG. 16, the surgical handpiece assembly 104 also includes a rotatable drive. The rotatable drive chuck 172 is configured to rotate around the hub axis HX. The proximal portion 174 of the rotatable drive chuck 172 is configured to be rotated by a motor. The drive chuck 172 may be directly engaged to the motor or may be rotatable. to transmit torque from the motor to the rotatable drive chuck 172. The rotatable drive may be engaged with a gear assembly or another assembly. The moving chuck 172 is at least partially inserted into the cavity 150 of the hub 146 proximal to the radial alignment member 162. The rotatable drive is at least partially disposed on the hub 146 and configured to rotate relative to the hub 146. The moving chuck 172 has an opening 17 for receiving the proximal region 112 of the drive shaft 110. Provision 6 is hereby provided.

[0057] As shown in FIGS. 23-25, the rotatable drive chuck 172 includes a drive portion 178 proximal to the opening 176. The drive portion 178 is configured to engage a drive portion 136 of the proximal region 112 of the drive shaft 110 to rotate the drive shaft 110 and has at least two drive surfaces 180. The drive surfaces 180 of the drive portion 178 of the rotatable drive chuck 172 engage the drive surfaces 138 of the drive portion 136 of the drive shaft 110 when the drive shaft 110 is in the drive direction and the high-speed surgical bar assembly 102 is coupled to the surgical handpiece assembly 104 (see FIG. 17). When the drive surface 138 of the drive shaft 110 is parallel to the drive surface 180 of the drive portion 178 of the rotatable drive chuck 172, the drive shaft 110 is in the drive direction. In the configuration shown in FIGS. 23-25, the drive portion 1 78 includes eight drive surfaces 180 to accommodate various orientations of the drive portion 136 of the drive shaft 110. If there are more than two drive surfaces 180, multiple drive directions are presumed to exist. For example, in the configuration shown in FIGS. 23-25, there are four different drive directions. In other words, the drive shaft 110 can be rotated by the rotatable drive chuck 172 in four different radial orientations with respect to the rotatable drive chuck 172. The drive portion 178 could alternatively include three to seven drive surfaces 180 and be able to engage the drive portion 136 of the drive shaft 110. Alternatively, the drive portion 178 could be provided with nine or more drive surfaces 180 to engage the drive portion 136 of the drive shaft 110. The rotatable drive chuck 172 also includes a drive portion 17 of the rotatable drive chuck 172

[0058] ​​​​​​​​ It may include an alignment portion 182 disposed between 8 and the opening 176. The alignment portion 182 rotates It may extend distally from the driving portion 178 of the rotatable driving chuck 172 toward the opening of the rotatable driving chuck 172 and may have an alignment edge 184. Since the alignment edge 184 extends distally from the driving portion 178 of the rotatable driving chuck 172, the alignment edge 184 tapers away from the hub axis H X. The alignment edge 184 of the alignment portion 182 is configured to engage with the alignment portion 140 of the drive shaft 110 to rotate the drive shaft 110 in the driving direction.

[0059] The alignment portion 182 of the rotatable driving chuck 172 extends distally from the driving portion 178 of the rotatable driving chuck 172 toward the opening 176 of the rotatable driving chuck 172. It may have a first inclined surface 186. Since the first inclined surface 186 extends distally from the driving portion 178 of the rotatable driving chuck 172, the first inclined surface 186 tapers away from the hub axis HX . The alignment portion 182 of the rotatable driving chuck 172 is separate from the first inclined surface 186 and may have a second inclined surface 188 adjacent to the first inclined surface 186 . The second inclined surface 188 extends distally from the driving portion 178 of the rotatable driving chuck 172 toward the opening 176 of the rotatable driving chuck 172. Since the second inclined surface 188 extends distally from the driving portion 178 of the rotatable driving chuck 172, the second inclined surface 188 tapers away from the hub axis HX. The first and second inclined surfaces 186, 188 collectively define the alignment edge 184 of the rotatable driving chuck 172. In the configuration shown in FIGS. 23-25, the alignment portion 182 includes four alignment edges 184. Each alignment edge 184 has a first ... ... ... ... It is formed by the inclined surface 186 and the second inclined surface 188. In other configurations, the rotatable The alignment portion 182 of the drive chuck 172 includes three or fewer alignment edges 184. In still other configurations the alignment portion 182 includes five or more alignment edges 184. In some configurations, the first and second inclined surfaces 186, 188 are symmetric with respect to the alignment edge 184. In other configurations the first and second inclined surfaces 186, 188 are not symmetric with respect to the alignment edge 184.

[0060] In one exemplary configuration, the coupling between the high-speed surgical bar assembly 102 and the surgical handpiece assembly 104 is described below. The user can grip the nose tube 106 of the high-speed surgical bar assembly 1 02 or another portion of the high-speed surgical bar assembly 102 and axially load (i.e., insert) the proximal portion 108 of the nose tube 106 and the proximal region 112 of the drive shaft 110 into the cavity 150 of the hub 146 of the surgical handpiece assembly 104. After the nose tube 106 and the drive shaft 110 enter the cavity 150 to a specific depth, the nose tube 106 is radially and axially restrained with respect to the hub 146 of the surgical handpiece assembly 104, and the drive shaft 11 0 is radially and axially restrained with respect to the rotatable drive chuck 172 of the surgical handpiece assembly 104. The restraint will be described in more detail below. As described above, the drive shaft 110 is axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further 0 is radially and axially restrained with respect to the rotatable drive chuck 172 of the surgical handpiece assembly 104. The restraint will be described in more detail below. As described above, the drive shaft 110 is axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further more, the rotatable drive chuck 172 is radially and axially restrained to the nose tube 106 by the proximal and distal bushings 116, 118 of the high-speed surgical bar assembly 102. Further It is axially restrained within the cavity 150 of the hub 146 by reference (see FIG. 5). Thus , when the nose tube 106 is axially restrained relative to the hub 146, the drive shaft 110 is axially restrained relative to the rotatable drive chuck 172. Regarding radially restraining the nose tube 106 and the drive shaft 110, the drive shaft 110 is radially restrained relative to the rotatable drive chuck 172 before the nose tube 106 is radially restrained relative to the hub 146. In other configurations, the drive shaft 110 and the nose tube 106 can be radially restrained simultaneously. In still other configurations , the nose tube 106 can be radially restrained before the drive shaft 110. After both the drive shaft 110 and the nose tube 106 are radially restrained, the nose tube 106 is axially restrained. An exemplary configuration for restraining the nose tube 106 and the drive shaft 110 is described below.

[0061] When the drive shaft 110 of the high-speed surgical burr assembly 102 enters the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the drive shaft 110 enters through the opening 176 of the rotatable drive chuck 172. After passing through the opening 176 of the rotatable drive chuck 172 , the outer surface of the alignment portion 140 of the drive shaft 110 is adjacent to one of the alignment edges 184 of the alignment portion 182 of the rotatable drive chuck 172. As the drive shaft 110 continues to be axially loaded into the cavity 150 of the hub 146, the engagement between the alignment portion 140 of the drive shaft 110 and the alignment edge 184 of the rotatable drive chuck 172 causes the drive shaft 110 to be axially restrained relative to the rotatable drive chuck 172. Orient the drive portion 136 in the driving direction. In the driving direction, the driving surface 138 of the drive shaft 110 engages with the driving surface 180 of the rotatable drive chuck 172 to radially restrain the drive shaft 11 0 to the rotatable drive chuck 172. When the driving surface 138 engages with the driving surface 180, torque can be transmitted from the rotatable drive chuck 172 to the drive shaft 110 and ultimately to the cutting tool 114.

[0062] In one configuration shown in FIG. 26, the rotatable drive chuck 172 may define a cutout 192 to provide additional clearance between the rotatable drive chuck 172 and the proximal end of the drive shaft 110 when the high-speed surgical bar assembly 102 is coupled to the surgical handpiece assembly 104. The additional clearance provided by the cutout 192 reduces the clearance for engagement between the proximal end of the drive shaft 110 and the surface of the rotatable drive chuck 172 that occurs before the nose tube 106 is axially restrained to the hub 146. In other words, the additional clearance provided by the cutout 192 ensures that the continued insertion of the drive shaft 110 into the rotatable drive chuck 172 does not interfere with the axial coupling of the nose tube 106 to the hub 146 of the hub 146. By engagement between the alignment portion 140 of the drive shaft 110 and the alignment portion 18 2 of the rotatable drive chuck 172, rotation of the drive shaft 110 in the driving direction can be made to be achieved only by the user axially loading the high-speed surgical bar assembly 102 into the cavity 150 of the hub 146 of the surgical handpiece assembly 104. In other words the continued insertion of the drive shaft 110 into the rotatable drive chuck 172 does not interfere with the axial coupling of the nose tube 106 to the hub 146 of the hub 146.

[0063] By engagement between the alignment portion 140 of the drive shaft 110 and the alignment portion 18 2 of the rotatable drive chuck 172, rotation of the drive shaft 110 in the driving direction can be made to be achieved only by the user axially loading the high-speed surgical bar assembly 102 into the cavity 150 of the hub 146 of the surgical handpiece assembly 104. In other words rotation of the drive shaft 110 in the driving direction can be made to be achieved only by the user axially loading the high-speed surgical bar , the drive shaft 110 can be oriented in the drive direction without the user gripping the cutting tool 114 or another part of the drive shaft 110 and operating the drive shaft 110 in the drive direction. In some cases, the drive shaft 110 may be considered to enter the cavity 150 of the hub 146 in the drive direction. In such a case, the alignment portion 140 of the drive shaft 110 should not contact the alignment portion 182 of the rotatable drive chuck 172, and the drive shaft 110 should not engage with anything until the drive portion 136 of the drive shaft 110 engages with the drive portion 178 of the rotatable drive chuck 172. As shown in FIGS. 20 - 22, a nose tube 106 that is axially and radially restrained is shown. The drive shaft 110 in FIGS. 20 - 22 has been removed to better show the engagement between the nose tube 106 and the surgical handpiece assembly 104. Referring to FIG. 20, the surgical handpiece assembly 104 is shown with the hub 146, the radial alignment member 162, and the biasing member 152. The biasing member 152 is shown in a compressed state without bias. When the nose tube 106 enters the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the nose tube 106 engages with the biasing member 152 by adjacent to the distal tapered surface 160 of the biasing member 152. When sufficient axial force is applied to the nose tube 106 to overcome the spring force of the biasing member 152, the biasing member 152 expands to the biased state shown in FIG. 21 to accommodate the proximal portion 108 of the nose tube 106. In many cases, the protrusion 130 of the nose tube 106 may be misaligned and engage with the alignment wall 166 of the radial alignment member 162. In some cases, the drive shaft 110 may be considered to enter the cavity 150 of the hub 146 in the drive direction. In such a case, the alignment portion 140 of the drive shaft 110 should not contact the alignment portion 182 of the rotatable drive chuck 172, and the drive shaft 110 should not engage with anything until the drive portion 136 of the drive shaft 110 engages with the drive portion 178 of the rotatable drive chuck 172. The drive shaft 110 should not engage with anything until the drive portion 136 of the drive shaft 110 engages with the drive portion 178 of the rotatable drive chuck 172.

[0064] As shown in FIGS. 20 - 22, a nose tube 106 that is axially and radially restrained is shown. The drive shaft 110 in FIGS. 20 - 22 has been removed to better show the engagement between the nose tube 106 and the surgical handpiece assembly 104. Referring to FIG. 20, the surgical handpiece assembly 104 is shown with the hub 146, the radial alignment member 162, and the biasing member 152. The biasing member 152 is shown in a compressed state without bias. When the nose tube 106 enters the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the nose tube 106 engages with the biasing member 152 by adjacent to the distal tapered surface 160 of the biasing member 152. When sufficient axial force is applied to the nose tube 106 to overcome the spring force of the biasing member 152, the biasing member 152 expands to the biased state shown in FIG. 21 to accommodate the proximal portion 108 of the nose tube 106. In many cases, the protrusion 130 of the nose tube 106 may be misaligned and engage with the alignment wall 166 of the radial alignment member 162. ​​​​ Because of the possibility, the continuous axial force applied to the nose tube 106 causes the protrusion 130 to be aligned with the notch 164 until relative rotation between the nose tube 106 and the hub 146 can be brought about. In other words, the nose tube 106 allows the user to hold the nose tube 106 without radially operating the nose tube 106, and the protrusion 130 of the nose tube 106 can be oriented to be received by the notch 164 of the radial alignment member 162.

[0065] In some configurations, as shown in FIG. 22, the biasing member 152 can be received in the recess 124 of the nose tube 106 when the nose tube 106 is at a specific depth within the cavity 150 of the hub 146, and the proximal tapered surface 158 of the biasing member 152 can be adjacent to the proximal shoulder 126 of the recess of the nose tube 106. When the proximal tapered surface 158 of the biasing member 152 is adjacent to the proximal shoulder 126 of the recess 124 of the nose tube 106 and the distal end of the biasing member 152 is adjacent to the distal shoulder 156 of the recess 154 of the hub 146, the spring force of the biasing member 152 can be sufficient to engage the nose tube 106 and push the protrusion 130 of the nose tube 106 deeper into the notch 164 of the radial alignment member 162. If the biasing member 152 has not returned to its un-biased compressed state and the protrusion 130 of the nose tube is fully received by the notch 164 of the radial alignment member 162, such that axial movement of the nose tube 106 in the proximal direction relative to the hub 146 is prevented, the biasing member 152 continues to engage the nose tube 106 and against the hub 146 ​The hub 146, the biasing member 152, the radial alignment member 162, and the nose tube 106. The axial fit can eliminate gaps that might otherwise exist. Such gaps can form due to wear, tolerance stack-up, etc. In other configurations, the nose The recess 124 of the tube 106 receives a biasing member 152 that is biased against the hub 14. 6. In such a configuration, the biasing member 15 2 includes a hub 146, a biasing member 152, a radial alignment member 162, and a nose tube 1 06 to maintain a tight axial fit between the nose tube 106 and the Not at all.

[0066] In some cases, the nose tube 106 extends radially into a cavity 150 in the hub 146. Therefore, the protrusion 130 of the nose tube 106 can be moved without rotating the nose tube 106. Instead, it may be received by a notch 164 in the radial alignment member 162. The projection 130 of the nozzle tube 106 does not contact the alignment wall 166 of the radial alignment member 162. The protrusion 130 of the nose tube 106 may be located adjacent to the protrusion 130 of the nose tube 106. 30 does not engage anything until it is received by the notch 164 of the radial alignment member 162. There is a possibility.

[0067] In addition, the words "include", "includes", and "contains The term "including" means "comprise" or "contains" "includes," "commercial use," "publications," "publications of," "publications of It should be understood to have. Further, in this specification, terms such as "first", "second", "third", etc. are used for non-limiting and illustrative purposes of clarity and consistency to distinguish specific structural features and components.

[0068] Several configurations have been described in the foregoing explanation. However, the configurations described in this specification are not intended to be exhaustive or to limit the present invention to a specific form. The terms used are intended to be of a nature of words of explanation rather than limitation. Many modifications and variations are possible in light of the above teachings, and the present invention can be practiced in ways other than specifically described.

[0069] This disclosure is intended to be defined by independent claims with specific features arranged in dependent claims, and the subject matter of claims dependent on a particular independent claim can also be implemented in relation to another independent claim.

[0070] This disclosure also includes the following sections with specific features arranged in dependent sections that can be implemented more specifically as described with reference to the above configurations and drawings. Section

[0071] I. A high-speed surgical bar assembly for connection to a surgical handpiece, a nose tube defining a lumen, the lumen having a proximal portion with a longitudinal axis, and the nose tube having an outer surface defining a recess for receiving a biasing member for suppressing the depth of the nose tube relative to the surgical handpiece, and the nose tube including at least one protrusion distal to the recess, the protrusion for engaging the high-speed surgical bar assembly with the surgical hand A nose tube configured to be aligned radially with a d-piece, and A drive shaft having an alignment portion disposed at least partially within the lumen and configured to align a drive portion of the drive shaft in a direction engaging a rotatable drive chuck in a proximal region of the drive shaft, wherein the drive shaft has a holding portion distal to the alignment portion and the drive portion, and the holding portion has a diameter larger than the diameter of the lumen so that the drive shaft is held within the lumen of the nose tube, and a cutting tool coupled to a distal region of the drive shaft on the opposite side of the alignment portion. II. The projection extends radially to the peak with respect to the longitudinal axis of the proximal portion of the lumen, and the distance between the outer surface of the nose tube defining the recess and the longitudinal axis is smaller than the distance between the surface of the peak and the longitudinal axis. A high-speed surgical burr assembly according to section I. III. A high-speed surgical burr assembly according to any of sections I-II, wherein at least one projection includes an inclined surface, and the peak of the projection enables the high-speed surgical burr assembly to be aligned radially with the surgical handpiece. IV. A high-speed surgical burr assembly according to any of sections I-III, wherein the peak defines a radius distal to the inclined surface. V. A high-speed surgical burr assembly according to any of sections I-IV, wherein the alignment portion of the drive shaft defines a leading edge that engages a rotatable drive chuck and aligns the drive portion of the drive shaft in a direction engaging the rotatable drive chuck. VI. A high-speed surgical burr assembly according to section V, wherein the leading edge is defined between at least two curved surfaces to enable the drive portion to cam in a direction engaging a rotatable drive chuck. VII. A high-speed surgical burr assembly according to section VI, wherein at least two curved surfaces are asymmetric across the longitudinal axis. ​​​​​​​​​​​​ Surgical bar assembly. VIII. A high-speed surgical handpiece assembly, comprising a hub having a proximal end and a distal end opposite the proximal end, the hub having an inner surface defining a bore extending from the distal end to the proximal end, the inner surface defining an alignment channel communicating with the bore extending from the distal end to the proximal end, the hub; a retaining element disposed within the bore proximal to the alignment channel; a rotatable drive chuck disposed within the bore proximal to the retaining element, the rotatable drive chuck having a drive chamber; a nose tube defining a lumen extending between the proximal end and the distal end, the nose tube having an outer surface defining a recess surrounding the nose tube, the recess engaging with the retaining element to inhibit the depth of the nose tube relative to the hub, the nose tube including at least one protrusion configured to be received by the alignment channel to align the nose tube with the hub; a drive shaft at least partially disposed within the lumen of the nose tube and having an alignment portion configured to align the drive portion of the drive shaft in a direction engaging with the drive chamber of the rotatable drive chuck; and a cutting tool coupled to the drive shaft. IX. The high-speed surgical handpiece assembly of section VIII, wherein the alignment portion of the drive shaft defines a leading edge that engages an inclined surface of the rotatable drive chuck to align the drive portion of the drive shaft in a direction engaging with the drive chamber of the rotatable drive chuck. X. The high-speed surgical handpiece assembly according to any one of sections VIII to IX, wherein the retaining function includes a biasing member. XI. High-speed surgical handpiece assembly according to any of Sections VIII-X, wherein the nose tube comprises a monolithic structure. for the department. XII. High-speed surgical handpiece assembly according to Section XI, wherein the recess and the protrusion are formed of a metallic material. assembly. XIII. High-speed surgical handpiece assembly according to Section XII, wherein the monolithic nose tube is formed of the metallic material of the protrusion and the recess. assembly.

Claims

1. 1. A surgical handpiece system comprising:

1. A high speed surgical burr assembly comprising: The nose tube defines a lumen extending between a proximal end and a distal end, the lumen extending along an axis. a proximal portion extending along a distal end of said proximal portion having an outer surface defining a nose tube recess; a nose tube including a protrusion disposed proximal to the nose tube recess; A nose tube is disposed at least partially within the lumen of the nose tube. a drive shaft configured to rotate relative to the drive shaft; a cutting tool coupled to a distal region of the drive shaft and attached to the nose tube; a cutting tool configured to rotate with the drive shaft relative to the cutting tool; a high speed surgical burr assembly including:

1. A surgical handpiece assembly comprising: a proximal portion of the nose tube of the high speed surgical burr assembly; a hub having a bore defining a cavity for the bearing; a biasing member disposed within the cavity of the hub to bias the hub against the hub; to restrict the depth of the nose tube of the high speed surgical burr assembly within the cavity of the configured to be received by the nose tube recess of the nose tube for a biasing member; a radial alignment member disposed within the cavity of the hub proximal to the biasing member; a notch for receiving the protrusion, said nose tube being attached to said hub; a radial alignment member for inhibiting radial orientation of the a surgical handpiece assembly including:

1. A surgical handpiece system comprising:

2. the projection of the proximal portion of the nose tube extends proximally and generally parallel to the axis; 10. The surgical handpiece system of claim 1.

3. a proximal end of the protrusion of the proximal portion of the nose tube includes a rounded surface.

3. The surgical handpiece system according to claim 1 or 2.

4. The protrusion on the proximal portion of the nose tube a flat surface parallel to the axis of the nose tube relative to the hub, the flat surface being a surface of the radial alignment member defining the notch for constraining the radial orientation The surgical hand according to any one of claims 1 to 3, Peace system.

5. The exterior surface of the proximal portion of the nose tube has a proximal sleeve defining a proximal end of the recess.

5. The method of claim 1, further comprising: Item 5. A surgical handpiece system as described in item 4.

6. The bore of the hub defines a hub recess in communication with the cavity, the bore defining the a distal shoulder for defining a distal end of a hub recess, the biasing member being the distal shoulder and the proximal shoulder of the nose tube engage the nose The protrusion of the nozzle tube is pushed toward the notch of the radial alignment member.

6. The surgical handpiece system of claim 5,

7. a proximal bushing disposed at least partially within the lumen of the nose tube. Thus, the proximal bushing further comprises a proximal bushing surrounding a portion of the drive shaft. The surgical handpiece system of claim 1 , further comprising:

8. The drive shaft further comprises a proximal region, the proximal region of the drive shaft comprising: a retaining portion proximal to the proximal bushing, the retaining portion being disposed within the proximal bushing; the drive shaft having an outer diameter greater than the outer diameter of the nose tube and extending distally relative to the nose tube; The surgical handpiece system of claim 7 , further comprising:

9. a distal bushing coupled to a distal region of the nose tube, the distal bushing 2. The method of claim 1, wherein the drive shaft further comprises a distal bushing surrounding a portion of the drive shaft.

9. A surgical handpiece system according to any one of claims 8 to 9.

10. The cutting tool is adapted to move the drive shaft proximally relative to the nose tube.

10. The distal bushing of claim 9, further comprising an outer diameter greater than an inner diameter of the distal bushing to prevent Surgical handpiece system.

11. The surgical handpiece of claim 1 , wherein the cutting tool comprises a burr. system.

12. The proximal region of the drive shaft is disposed outside the lumen of the nose tube.

12. The surgical handpiece system according to claim 8, wherein

13. A high speed surgical handpiece configured to cut tissue and couple to a surgical handpiece assembly.

1. A bar assembly comprising: a nose tube defining a lumen extending between a proximal end and a distal end, the nose tube extending along the axis; a proximal portion extending from the surgical handpiece assembly, the proximal portion receiving a biasing member of the surgical handpiece assembly; a surgical handpiece assembly having an outer surface defining a recess for receiving the surgical handpiece assembly; a protrusion that limits a depth of the nose tube and is disposed proximal to the recess; inhibits radial orientation of the nose tube relative to the surgical handpiece assembly. a nose tube configured to control a nose tube having a lumen at least partially disposed within the lumen of the nose tube; a drive shaft configured to rotate relative to the surgical handpiece assembly; a drive shaft proximal region for engaging a rotatable drive chuck of the assembly; a drive shaft having a portion; a cutting tool coupled to a distal region of the drive shaft opposite the drive portion, in response to rotation of the rotatable drive chuck of the surgical handpiece assembly, a cutting tool configured to rotate with the drive shaft relative to the nose tube; 1. A high speed surgical burr assembly comprising:

14. the projection of the proximal portion of the nose tube extends proximally and generally parallel to the axis; 14. The high speed surgical burr assembly of claim 13.

15. a proximal end of the protrusion of the proximal portion of the nose tube includes a rounded surface.

15. The high speed surgical burr assembly of claim 13 or 14.

16. The protrusion on the proximal portion of the nose tube a flat surface parallel to the axis of the surgical hand, the flat surface being disposed between the nose tube and the surgical hand; to prevent relative rotation between the surgical handpiece assembly and the surgical handpiece assembly.

16. The high speed sensor according to claim 13, wherein the high speed sensor is configured to be adjacent to a surface of the sensor. Surgical burr assembly.

17. The drive shaft further includes an alignment portion proximal to the drive portion of the drive shaft. The alignment portion aligns the drive portion of the drive shaft with the surgical handpiece assembly. and aligning the drive portion of the drive shaft with the rotatable drive chuck of the 17. The method of claim 13, further comprising the steps of:

13. The high speed surgical burr assembly of any one of claims 1 to 12.

18. The alignment portion extends from the drive portion to a proximal end of the drive shaft. The alignment portion has an outer surface that tapers toward the axis as the alignment portion is moved toward the surgical hand. a drive chuck of a drive piece assembly for engaging said rotatable drive chuck of said drive shaft; Aligning the drive portion in a drive direction so that the drive portion engages the rotatable drive chuck.

20. The high speed surgical burr assembly of claim 17, configured to:

19. The alignment portion engages the rotatable drive chuck while the alignment portion engages the drive chuck. to reduce contact between the alignment portion of the shaft and the rotatable drive chuck; 17 or 1, defining a notch extending distally from the proximal end of the drive shaft.

9. The high speed surgical burr assembly as recited in claim 8.

20. The alignment portion is adapted to align the drive portion of the drive shaft with the rotatable drive chuck. To align the drive portion in a drive direction to mate with the surgical handpiece assembly, 17-14. The method of claim 15, further comprising:

10. The high speed surgical burr assembly of claim 9.

21. The alignment portion is adapted to align the proximal edge with the surgical instrument after the drive portion is aligned in the drive direction. to prevent further engagement with the rotatable drive chuck of the handpiece assembly.

21. The high speed surgical burr of claim 20, including a proximal surface disposed proximally of the proximal edge. Senburi.

22. The high speed surgical bar assembly of claim 21, wherein the proximal face includes a plane perpendicular to the axis. Yellowtail.

23. The exterior surface of the proximal portion of the nose tube has a proximal sleeve defining a proximal end of the recess. a proximal shoulder, the proximal shoulder being tapered, a biasing member of a surgical handpiece assembly to bias the nose tube toward the outer 23. The method of claim 13, further comprising the steps of:

2. The high speed surgical burr assembly of claim 1.

24. a proximal bushing disposed at least partially within the lumen of the nose tube. Thus, the proximal bushing further comprises a proximal bushing surrounding a portion of the drive shaft.

24. The high speed surgical burr assembly of any one of claims 13 to 23, further comprising:

25. The drive shaft is distal to the drive portion and proximal to the proximal bushing. a retaining portion having an outer diameter greater than an inner diameter of the proximal bushing. and preventing movement of the drive shaft in a distal direction relative to the nose tube.

25. The high speed surgical burr assembly of claim 24.

26. a distal bushing coupled to a distal region of the nose tube, the distal bushing 14. The method of claim 13, wherein the drive shaft further comprises a distal bushing surrounding a portion of the drive shaft.

26. The high speed surgical burr assembly of claim 25.

27. The cutting tool is adapted to move the drive shaft proximally relative to the nose tube.

27. The method of claim 26, wherein the distal bushing has an outer diameter greater than an inner diameter of the distal bushing to prevent 1. A high speed surgical burr assembly.

28. 28. The high speed surgical burr of any one of claims 13 to 27, wherein the cutting tool comprises a bur. -Assembly.

29. The proximal region of the drive shaft is disposed outside the lumen of the nose tube.

29. The high speed surgical burr assembly of any one of claims 13 to 28,

30. A high speed surgical handpiece configured to cut tissue and couple to a surgical handpiece assembly.

1. A bar assembly comprising: a nose tube defining a lumen extending between a proximal end and a distal end, a proximal portion configured to be coupled to a front endpiece assembly, Constraining the radial orientation of the nose tube relative to the surgical handpiece assembly. a nose tube including a protrusion configured to a nose tube having a lumen at least partially disposed within the lumen of the nose tube; a drive shaft configured to rotate relative to the drive shaft and having a proximal region extending along the axis; and the proximal region comprises: Engaging a rotatable drive chuck of the surgical handpiece assembly in a driving direction a drive part for driving the an alignment portion proximal to the drive portion of the drive shaft, the alignment portion being in front As it extends from the drive portion to the proximal end of the drive shaft, it tapers toward the axis. a drive shaft having an outer surface adapted to engage the rotatable drive chuck and move the drive portion to the drive shaft; the drive portion of the chuck is aligned in the drive direction for engaging the rotatable drive chuck. and wherein the drive chuck is adapted to rotate the alignment portion during engagement of the alignment portion with the rotatable drive chuck. to reduce contact between the alignment portion of the shaft and the rotatable drive chuck; an alignment portion defining a notch extending distally from the proximal end of the drive shaft; a drive shaft including coupled to a distal region of the drive shaft opposite the proximal region of the drive shaft 11. A cutting tool, comprising: a rotatable drive chuck of the surgical handpiece assembly; configured to rotate with the drive shaft relative to the nose tube in response to rotation A cutting tool, 1. A high speed surgical burr assembly comprising:

31. The alignment portion is adapted to align the drive portion of the drive shaft with the rotatable drive chuck. the surgical handpiece assembly to align the drive portion in a drive direction so as to mate with the 31. The method of claim 30, further comprising: High speed surgical burr assembly.

32. The alignment portion is adapted to align the proximal edge with the surgical instrument after the drive portion is aligned in the drive direction. to prevent further engagement with the rotatable drive chuck of the handpiece assembly.

32. The high speed surgical burr of claim 31 , including a proximal surface disposed proximally of the proximal edge. Senburi.

33. The high speed surgical burr assembly of claim 32, wherein the proximal face includes a plane perpendicular to the axis. Yellowtail.

34. the projection of the proximal portion of the nose tube extends proximally and generally parallel to the axis; 34. The high speed surgical burr assembly of any one of claims 30 to 33.

35. a proximal end of the protrusion of the proximal portion of the nose tube includes a rounded surface.

35. The high speed surgical burr assembly of any one of claims 30 to 34.

36. The protrusion on the proximal portion of the nose tube a flat surface parallel to the axis of the surgical hand, the flat surface being disposed between the nose tube and the surgical hand; to prevent relative rotation between the surgical handpiece assembly and the surgical handpiece assembly.

36. The high speed sensor according to claim 30, configured to be adjacent to a surface of the sensor. Surgical burr assembly.

37. The proximal portion of the nose tube is forwardly proximal to the surgical handpiece assembly. a biasing portion of the surgical handpiece assembly for restricting the depth of the nose tube; 37. Any one of claims 30 to 36, having an outer surface defining a recess for receiving the material.

2. A high speed surgical burr assembly as described in claim 1.

38. The exterior surface of the proximal portion of the nose tube has a proximal sleeve defining a proximal end of the recess. a proximal shoulder, the proximal shoulder being tapered, the proximal shoulder being The handpiece assembly includes a biasing member that biases the nose tube toward the surgical handpiece assembly.

38. The high speed surgical burr of claim 37, configured to be pressed into a endpiece assembly. assembly.

39. a proximal bushing disposed at least partially within the lumen of the nose tube. Thus, the proximal bushing further comprises a proximal bushing surrounding a portion of the drive shaft.

39. The high speed surgical burr assembly of any one of claims 30 to 38, including:

40. The drive shaft is distal to the drive portion and proximal to the proximal bushing. a retaining portion configured to retain the drive member in a distal direction relative to the nose tube; an outer diameter greater than an inner diameter of the proximal bushing to prevent movement of the moving shaft; 40. The high speed surgical burr assembly of claim 39.

41. a distal bushing coupled to a distal region of the nose tube, the distal bushing 31. The drive shaft of claim 30, wherein the drive shaft further comprises a distal bushing that surrounds a portion of the drive shaft.

41. The high speed surgical burr assembly of claim 40.

42. The cutting tool is adapted to move the drive shaft proximally relative to the nose tube.

42. The method of claim 41, wherein the distal bushing has an outer diameter greater than an inner diameter of the distal bushing to prevent 1. A high speed surgical burr assembly.

43. 43. The high speed surgical burr of any one of claims 30 to 42, wherein the cutting tool comprises a bur. -Assembly.

44. The proximal region of the drive shaft is disposed outside the lumen of the nose tube.

44. The high speed surgical burr assembly of any one of claims 30 to 43,

45. A nose tube and a drive shaft rotatably coupled to the nose tube. A surgical handpiece assembly configured to be coupled to a high speed surgical burr assembly Li, a hub having a bore defining a cavity for receiving a proximal portion of the nose tube; 、 a biasing member disposed within the cavity of the hub to bias the hub against the hub; a recess for engaging the nose tube to constrain the depth of the nose tube within the cavity; a biasing member configured to bias the a radial alignment member disposed within the cavity of the hub proximal to the biasing member, The nose tube is adapted to constrain a radial orientation of the nose tube relative to the hub. a notch for receiving a protrusion of a probe and having an alignment wall extending distally from the notch; and the notch is adapted to receive the protrusion of the nose tube. a projection of the nose tube that engages the projection of the nose tube and radially positions the nose tube; An alignment member; 1. A surgical handpiece assembly comprising:

46. a rotatable drive chuck configured to be rotated by the motor about an axis; the rotatable drive chuck is disposed within the cavity of the hub and is adapted to engage with the hub. a drive shaft adapted to rotate about the drive shaft and configured to rotate the drive shaft at least 46. ​​The surgical handpiece of claim 45, further defining an opening for partially receiving the assembly.

47. The rotatable drive chuck includes a drive portion disposed proximate the opening, The moving portion is adapted to drively engage the drive shaft to rotate the drive shaft.

47. The surgical handpiece of claim 46 having at least two configured drive surfaces. Senburi.

48. The rotatable drive chuck is adapted to engage the drive portion of the rotatable drive chuck and the opening. an alignment portion disposed between the mouth of the rotatable drive chuck and the alignment portion an alignment edge extending distally from the drive portion toward the opening in the rotatable drive chuck; wherein the alignment edge extends distally from the drive portion of the rotatable drive chuck.

48. The surgical handpiece of claim 47, wherein the alignment edge tapers away from the shaft. Assembly.

49. The alignment edge of the alignment portion of the rotatable drive chuck aligns the drive shaft with the for engaging said at least two drive surfaces of said drive portion of a rotatable drive chuck and configured to engage the drive shaft so as to orient the drive shaft in the drive direction.

49. The surgical handpiece assembly of claim 48.

50. The alignment portion of the rotatable drive chuck is aligned with the drive of the rotatable drive chuck. a first angled surface extending distally from the moving portion toward the opening in the rotatable drive chuck. the first angled surface extending distally from the drive portion of the rotatable drive chuck; As the first angled surface tapers away from the axis, the rotatable drive channel The alignment portion of the rotatable drive chuck is aligned with the drive portion of the rotatable drive chuck. a first angled surface extending distally toward the opening of the drive chuck; a second inclined surface adjacent to said first inclined surface of said rotatable drive chuck, the second angled surface tapers away from the axis as it extends distally from the drive portion; The first and second angled surfaces collectively engage the alignment edge of the rotatable drive chuck.

50. A surgical handpiece assembly as claimed in claim 48 or 49, wherein

51. The bore defines a recess in communication with the cavity, the bore having a distal end extending from the recess. a distal shoulder for defining a distal end of the nose tube, the distal shoulder being configured to support the nose tube forward; a front end of said surgical handpiece assembly for pushing said radial alignment member toward said 51. The alternative of any one of claims 45 to 50, configured to engage with a biasing member. Dental handpiece assembly.

52. 1. A surgical handpiece system comprising:

1. A high speed surgical burr assembly comprising: a nose tube defining a lumen extending between a proximal end and a distal end; A nose tube is disposed at least partially within the lumen of the nose tube. a drive shaft configured to rotate relative to the drive shaft, the drive shaft extending along a drive shaft axis; a drive shaft having a proximal region extending from the drive shaft; a cutting tool coupled to a distal region of the drive shaft and attached to the nose tube; a cutting tool configured to rotate with the drive shaft relative to the cutting tool; a high speed surgical burr assembly including:

1. A surgical handpiece assembly comprising: The proximal end of the nose tube and the drive shaft of the high speed surgical burr assembly. a hub having a bore defining a cavity for receiving a proximal region of a shaft; a rotatable drive chuck configured to be rotated by a motor about a hub axle; a bearing configured to be disposed within the cavity of the hub and rotate relative to the hub; defining an opening for receiving the proximal region of the drive shaft; a drive portion disposed proximal to the opening for rotating the drive shaft; at least two drive surfaces configured to engage the drive shaft in a drive direction for driving the drive shaft; a drive portion having a an alignment portion disposed between the drive portion of the rotatable drive chuck and the opening; a drive portion of the rotatable drive chuck to drive the rotatable drive chuck; an alignment edge extending distally toward the opening of the rotatable drive chuck, the alignment edge being aligned with the rotatable drive chuck; As the alignment edge extends distally from the drive portion of the chuck, the alignment edge advances away from the hub axle. The thin, aligned part, a rotatable drive chuck including: a surgical handpiece assembly including: Including, The drive shaft is connected to the drive portion of the drive chuck which is rotatable by the drive shaft. of the rotatable drive chuck for engaging the at least two drive surfaces of configured to engage the alignment edge of an alignment portion to orient the drive shaft in the drive direction; A surgical handpiece system.

53. The drive shaft includes a drive portion and an alignment portion proximal to the drive portion. The alignment portion of the drive shaft is adapted to align the drive portion of the drive shaft with the rotatable drive chuck. the rotatable member for engaging the at least two drive surfaces of the drive portion of the chuck. a drive chuck having an alignment portion that engages the alignment edge of the alignment portion of the drive chuck to move the drive shaft in the drive direction; 53. The surgical handpiece system of claim 52, configured to orient the surgical handpiece in a direction parallel to the axis of the surgical instrument.

54. The alignment portion of the drive shaft is such that the alignment portion extends from the drive portion to the drive shaft. an outer surface that tapers toward the drive shaft axis as it extends to the proximal end of the drive shaft; The outer surface of the alignment portion is adapted to align the drive portion of the drive shaft with the rotatable drive channel. the rotatable shaft for engaging the at least two drive surfaces of the drive portion of the lock. Engage the alignment edge of the alignment portion of the drive chuck to move the drive shaft in the drive direction.

54. The surgical handpiece system of claim 53, configured to orient the surgical instrument in a direction parallel to the axis of the surgical instrument.

55. The alignment portion of the drive shaft extends distally from the proximal end of the drive shaft. a drive chuck having a drive shaft defining a notch therein during engagement with the alignment portion of the rotatable drive chuck; Contact between the alignment portion of the shaft and the alignment portion of the rotatable drive chuck is 55. The surgical handpiece system of claim 53 or 54,

56. The alignment portion of the drive shaft is adapted to engage the rotatable shaft of the surgical handpiece assembly. the alignment edge of the alignment portion of the drive chuck and the drive portion of the drive shaft. a drive portion of the rotatable drive chuck such that the drive portion engages the drive portion of the rotatable drive chuck; 56. The high-speed actuator of any one of claims 53 to 55, including a proximal edge for alignment in a drive direction. Fast surgical burr assembly.

57. The alignment portion of the drive shaft is aligned in the driving direction after the drive portion is aligned in the driving direction. The proximal edge further engages the rotatable drive chuck of the surgical handpiece assembly.

57. The method of claim 56, further comprising: providing a proximal surface disposed proximally of the proximal edge to prevent mating. High speed surgical burr assembly.

58. The proximal surface of the alignment portion of the drive shaft defines a plane perpendicular to the drive shaft axis.

58. The high speed surgical burr assembly of claim 57 including

59. a proximal bushing disposed at least partially within the lumen of the nose tube. Thus, the proximal bushing further comprises a proximal bushing surrounding a portion of the drive shaft.

59. The surgical handpiece system of any one of claims 52 to 58, including:

60. The drive shaft is distal to the drive portion and proximal to the proximal bushing. a retaining portion having an outer diameter greater than an inner diameter of the proximal bushing. and preventing movement of the drive shaft in a distal direction relative to the nose tube. Item 60. A surgical handpiece system as described in Item 59.

61. a distal bushing coupled to a distal region of the nose tube, the distal bushing 53. The method of claim 52, wherein the drive shaft further comprises a distal bushing surrounding a portion of the drive shaft.

61. A surgical handpiece system according to any one of claims 1 to 60.

62. The cutting tool is adapted to move the drive shaft proximally relative to the nose tube.

62. The method of claim 61, wherein the distal bushing has an outer diameter greater than an inner diameter of the distal bushing to prevent The surgical handpiece system.

63. 63. The surgical hand of any one of claims 52 to 62, wherein the cutting tool comprises a bur. Peace system.

64. The alignment portion of the rotatable drive chuck is aligned with the drive of the rotatable drive chuck. a first angled surface extending distally from the moving portion toward the opening in the rotatable drive chuck. the first angled surface being distal from the drive portion of the rotatable drive chuck. As it extends, the first angled surface tapers away from the hub axle and the rotatable drive chuck. The alignment portion of the rotatable chuck is aligned with the drive portion of the rotatable drive chuck. a first angled surface extending distally toward the opening of the drive chuck; a second inclined surface adjacent said drive chuck, said second inclined surface being in contact with said drive chuck of said rotatable drive chuck; As it extends distally from the moving portion, the second angled surface tapers away from the hub axle, The first and second inclined surfaces collectively define the alignment edge of the rotatable drive chuck.

64. The surgical handpiece system of any one of claims 52 to 63, further comprising:

65. The proximal region of the drive shaft is disposed outside the lumen of the nose tube.

65. The surgical handpiece system of any one of claims 52 to 64,

66. 1. A high speed surgical burr assembly for connection to a surgical handpiece assembly, comprising: a drive shaft having a proximal end and a distal end; a drive shaft disposed between said proximal end and said distal end and adapted to receive said drive shaft at least partially therebetween; a first region defining a lumen for connecting the drive shaft to the proximal end of the surgical handpiece; and a second region extending monolithically from the first region for coupling to the base. a nose tube, the second region connecting the nose tube to the surgical handpiece; an alignment feature configured to radially align the second region to the base assembly; to axially retain the nose tube in the surgical handpiece assembly. a nose tube including a retention feature configured therewith; a cutting tool coupled to the drive shaft at the distal end of the drive shaft; 1. A high speed surgical burr assembly comprising:

67. The alignment feature engages a hub of the surgical handpiece assembly to align the nose tube.

9. The surgical handpiece assembly of claim 8, further comprising a protrusion for aligning a probe with the surgical handpiece assembly. High speed surgical burr assembly.

68. 68. The method of claim 66 or 67, wherein the first and second regions are formed from a metallic material.

2. A high speed surgical burr assembly as described in claim 1.

69. The alignment and retention features are formed by the metal material forming the first and second regions.

70. The high speed surgical burr assembly of claim 68, formed from a material.

70. The drive shaft includes an alignment portion at the proximal end of the drive shaft and a recess adjacent the alignment portion. and a drive portion that contacts the alignment portion and is adapted to engage a rotatable drive chuck of the surgical handpiece. a leading edge that engages an inclined surface of a chuck to rotate the drive portion of the drive shaft; 70. The method of claim 66, further comprising: aligning the drive chuck in a direction that engages the drive chuck.

1. A high speed surgical burr assembly.

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