Handheld surgical device having a rotating portion

Abstract

A device may include a shaft configured to be rotated about a central axis by a motor. The shaft may include a working portion including a center of mass that is shifted away from the central axis and at least one cutting edge portion extending towards an outer circumference of the shaft.

Description

[0001] HANDHELD SURGICAL DEVICE HAVING A ROTATING PORTION

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims priority to U.S. Provisional patent application Serial No.: 63 / 538,959, filed on September 18, 2023; which is herein incorporated by reference in its entirety.

[0004] FIELD

[0005] This disclosure relates generally to a handheld surgical device configured for performing one or more surgical procedure(s).

[0006] BACKGROUND

[0007] Surgical tools are used in the healthcare field to, for example, affect (e.g., cut, remove, cauterize, etc.) an anatomical part during a surgical procedure. Generally, each surgical tool is configured to perform a specific function. Accordingly, it can be necessary for a professional to use multiple surgical tools during a surgical procedure when different functions are needed to complete the surgical procedure.

[0008] SUMMARY

[0009] When a healthcare professional uses multiple surgical tools, manual actions of switching between the two surgical tools can be very time consuming and can lead to an increase in associated costs and complications.

[0010] The disclosure herein provides improved handheld surgical devices and methods related to handheld surgical devices. Some of the embodiments of the handheld surgical devices described herein are configured with a working portion that is contained (when not in operation), and then exposed (when in operation). The term “contained” is used herein can mean that an element is located or positioned to be protected or covered by another structure, at least partially or entirely. Accordingly, a working portion that is contained can mean that, at least a part of or all of, the working portion is protected or covered by another structure (e g., a concave-shaped portion, a hooded cover, or a partially enclosed scoop).

[0011] According to some embodiments, for example, the working portion can be contained in a concave-shaped portion when the working portion is not in operation. When the working portion is activated, at least a part of the working portion becomes exposed from the concave-shaped portion so that at certain times, the working portion is not covered by the concave-shaped portion.

[0012] According to some embodiments, for example, a working portion is formed on or otherwise located at or near an end of a shaft such that when the shaft rotates, the working portion also rotates. The working portion has a center of mass that is shifted away or offset from a central axis of the shaft. Due to the offset center of mass, the working portion rotates around a different axis than the central axis around which the rest of the shaft rotates. The working portion has one or more cutting edges or cutting edge portions extending towards an outer circumference of the shaft. According to some embodiments, the cutting edge portion(s) can extend beyond the circumference. The cutting edge portion(s) is configured to rotate when activated (e.g., powered, turned on, etc.). When not activated, the working portion is contained in a concave-shaped portion such that the cutting edge portion(s) of the working portion is covered by the concave-shaped portion. When activated, the shaft and the working portion rotate, and the rotation of the working portion causes the cutting edge portion(s) of the working portion to become exposed from the concave-shaped portion so that the rotating cutting edge portion(s) can cut materials without being hindered by the concave-shaped portion. The concave-shaped portion separates tissue that is intended to be cut with the working portion from surrounding tissue. The concave-shaped portion thus helps prevent the harm or unintentional cutting of tissue when the device is activated.

[0013] Further, when the working portion is contained, the part (e.g., concave-shaped portion) that covers the working portion can include another working portion that is configured for performing a different procedure. Thus, some of the embodiments of the handheld surgical devices can be used to perform two or more specific functions. Advantageously, the embodiments of the handheld surgical devices described herein can reduce or eliminate the need for switching between surgical devices during performance of a surgical procedure. Thus, there can be savings in time, related costs, or both. The handheld surgical device has a distal portion and a proximal portion. The terms “proximal” and “distal” are used herein to indicate portions of the handheld surgical device with respect to an operator's hand. In other words, when in use, the proximal portion is closer to the operator's hand than the distal portion of the handheld surgical device. The proximal portion includes a handle configured for being held by an operator's hand.

[0014] In some embodiments, a switch is disposed at the proximal portion (e.g., handle), and the switch is configured to operate a motor to rotate a shaft in the distal portion such that the working portion connected to the shaft rotates. In other embodiments, the switch may be disposed at a different position, such as for example, at the distal portion.

[0015] In some embodiments, the handheld surgical device is activated by a remote switch, such as for example, a foot pedal switch (wired or wireless) configured to activate the motor of the handheld surgical device when the foot pedal switch is activated by a foot, or a similar device. Accordingly, in some embodiments, a switch is not disposed at the proximal portion of the handheld surgical device.

[0016] In some embodiments, a switch is disposed at the proximal portion (e.g., handle) and a remote switch (e.g., foot pedal switch, etc.) are both included in the handheld surgical device. The concave-shaped portion is configured to protect nearby anatomical part(s) when the working portion is activated. When the switch turns off the motor, the motor is configured to ensure that the working portion is contained in the concave-shaped portion (e.g., the cutting edge(s) or edge portion(s) of the working portion is contained in the concave-shaped portion when the motor is not activated to rotate the shaft).

[0017] In some embodiments, the shaft and working portion are balanced (e.g., with a ground portion or counterweight).

[0018] BRIEF DESCRIPTION OF THE DRAWINGS

[0019] References are made to the accompanying drawings that form a part of this disclosure, and which illustrates the embodiments in which the devices and methods described herein can be practiced.

[0020] FIG. 1 depicts a schematic illustration according to some embodiments of the handheld surgical device. FIG. 2 depicts a schematic view of a portion of a distal portion of the handheld surgical device according to some embodiments.

[0021] FIGS. 3A and 3B depict schematic side views according to some embodiments of the handheld surgical device.

[0022] FIGS. 4A and 4B depict side views of portions of the shaft and working portion of the handheld surgical device shown in FIGS. 3A and 3B.

[0023] FIG. 5 depicts an end view of a portion of the working portion of the handheld surgical device shown in FIGS. 3A and 3B.

[0024] FIG. 6 depicts an end view of a portion of the working portion of the handheld surgical device according to some embodiments.

[0025] FIG. 7 depicts an end view of a portion of the working portion of the handheld surgical device according to some embodiments.

[0026] FIG. 8 depicts a perspective view of a portion of the working portion of the handheld surgical device according to some embodiments.

[0027] FIG. 9 depicts an end view of a portion of the working portion of the handheld surgical device according to some embodiments.

[0028] FIG. 10 depicts a perspective view of a portion of the working portion of the handheld surgical device according to some embodiments.

[0029] FIG. 11 depicts a schematic view of a portion of a distal portion of the handheld surgical device according to some embodiments.

[0030] DETAILED DESCRIPTION

[0031] Generally, a working portion of a handheld surgical device is configured for performing a specific function during a medical procedure that is performed by a healthcare professional. During the medical procedure, it can be necessary for the healthcare professional to switch between different handheld surgical devices at the same or near an anatomical location. According to some embodiments, for example, a device for cutting and removing soft tissue may be used, and then, when that device nears a bone, a different device may be needed to cut away the bone. Switching between different handheld surgical devices repeatedly within the wound to complete an operation can increase the operation time and associated costs. Further, switching between different surgical devices may require the healthcare professional to take her eyes off of the anatomical region (e.g., wound) and also may require additional mental concentration in order to acquire the correct tool for the needed function in the anatomical region. Accordingly, alternating between several tools can be tedious and may increase the fatigue of the healthcare professional, risk of contamination, infection, and / or damage to the patient. The contamination, infection, and / or unintended damage can cause or exacerbate problems for a patient and a treatment plan. Thus, there is a clear advantage for a handheld surgical device which can reduce and / or eliminate the tedious alternation between different tools.

[0032] The handheld surgical devices described herein can provide multiple tools and / or functions in a single device. Thus, the handheld surgical devices described herein can reduce and / or eliminate the tedious alternation between different tools.

[0033] An embodiment of a handheld surgical device described herein includes a concave-shaped portion with a cutting edge disposed on a distal portion, wherein the concave-shaped portion can contain a working portion with one or more cutting edges or cutting edge portions. When the working portion is activated (e.g., powered on) via a switch connected to a control unit, motor, and a power supply, the motor rotates a shaft, which in turn rotates the working portion. The shaft rotates about a central axis of the shaft. The working portion has a center of mass that is shifted away or offset from the central axis of the shaft. When the working portion rotates, the working portion rotates about a different axis than the central axis of the shaft. The rotation of the working portion exposes one or more cutting edge portion(s) of the working portion from the concaveshaped portion (i.e., the cutting edge portion(s) become not contained as the working portion is activated). The shaft and the working portion are rotationally balanced (e.g., with a ground portion or counterweight disposed on the shaft).

[0034] FIG. 1 depicts a schematic illustration of a handheld surgical device 100 according to some embodiments. The handheld surgical device 100 includes a proximal portion 102 and a distal portion 104. The proximal portion 102 includes a handle 106 configured for an operator's hand to hold, preferably comfortably, while the handheld surgical device 100 is being used. The distal portion 104 includes a working portion 108. At least a part of the working portion 108 is configured for being inserted into a wound or an anatomical area to perform a function (e.g., cut bone, cut tissue, etc.) during a surgical procedure.

[0035] In some embodiments, the distal portion 104 can be attached to or detached from the proximal portion 102 at an attachment region 110. According to some embodiments, for example, the distal portion 104 can be detached from the proximal portion 102 at the attachment region 110 after use in a surgical procedure, and then a new (i.e., unused) distal portion 104 can be attached to the proximal portion 102 at the attachment region 110 before being used in another surgical procedure. Alternatively, the distal portion 104 can be removed and cleaned / sanitized before being reattached to the proximal portion 102 for future use. That is, the distal portions 104 can be disposed of after use, or be sanitized after use for reuse.

[0036] The distal portion 104 includes a neck portion 112, which extends from the attachment region 110 to the working portion 108. The working portion 108 of the handheld surgical device 100 can be contained with a concaveshaped portion 114 disposed at or near the end of the distal portion 104. The concaveshaped portion 114 can be, for example, bowl-shaped and have a cutting edge 116. In some embodiments, the concave-shaped portion 114 can be a hooded cover, or be a partially enclosed scoop. According to some embodiments, for example, the cutting edge 116 and the concave-shaped portion 114 can be used for cutting and / or scooping soft tissue, without requiring a powered motor. The working portion 108 is connected to a motor and a power supply so that the working portion 108 can be activated for cutting harder tissue than soft tissue (e.g., bone, etc.). In some embodiments, the power supply may include a self-contained battery in the handle 106. In some embodiments, the power may be provided by one or more wires connected to one or more external batteries. In some embodiments, the power may be alternating current power that is provided by one or more external sources (e.g., a power outlet). In other embodiments, the power supply may include a pneumatic power supply or a vacuum driven power supply. In other embodiments, other types of power supplies may be used. The concave-shaped portion 114 separates tissue that is intended to be cut with the working portion 108 from surrounding tissue. Thus, the concave-shaped portion 114 helps prevent the harm or unintentional cutting of tissue that is not being targeted by the healthcare professional. Advantageously, a healthcare professional can use the handheld surgical device 100 for at least two different functions (e.g., for affecting different anatomical regions). Thus, the handheld surgical device 100 can eliminate the need for manually switching between two different surgical tools (e.g., for cutting soft tissue and for cutting bone) during a surgical procedure.

[0037] As described further herein, the working portion 108 can be exposed above a cutting edge 116 of the concave-shaped portion 114 by, for example, being activated to rotate within the concave-shaped portion 114. The proximal portion 102 of the handheld surgical device 100 includes a switch 118 disposed at or near the handle 106. Although not shown, some embodiments may include the switch disposed at a different position, such as for example, at the distal portion. The switch 118 is connected to a control unit in the handle 106 connected to a motor, which in turn is connected to a shaft inside the neck portion 112. The working portion 108 is located at or near a distal end of the shaft or is otherwise connected to a distal end of the shaft. In some embodiments, the working portion 108 is integrally formed with the shaft such that the working portion 108 is a part of the shaft. In some embodiments, the working portion is removably attached to the shaft so that the working portion may be replaced. When the switch 118 is activated, the control unit powers the motor for rotating the shaft and the working portion 108. The handheld surgical device 100 can be of various shapes and sizes.

[0038] FIG. 2 depicts a schematic cutaway side view of a portion of a handheld surgical device 200. The distal portion 202 of the handheld surgical device 200 includes a housing 204 that encases a shaft 206. The housing 204 has a body configured to define an inner chamber 208, inside of which the shaft 206 is located.

[0039] The housing 204 includes or is connected to a concave-shaped portion 210 with a cutting edge 212. The concave-shaped portion 210 includes a concave structure with a bowl-shape. The bowl-shape of the concave-shaped portion 210 can have an enclosed lower surface, rounded sides, and an opening on an upper surface.

[0040] The shaft 206 includes and / or is connected to a working portion 214. The working portion 214 includes one or more cutting edges or cutting edge portions that extend towards an outer circumference of the shaft. Accordingly, when the shaft 206 rotates, the cutting edge portions rotate for cutting (e.g., bone, flesh, etc.). The shaft 206 is configured to rotate about a central axis 220 of the shaft 206 when in operation (e.g., powered on, activates, etc.), as indicated by the arrow and axis in FIG. 2. The working portion 214 has a center of mass that is shifted away or offset from the central axis 220 of the shaft 206. When in operation the shaft 206 rotates the working portion 214. Because the center of mass of the working portion 214 is shifted away from the central axis 220, the working portion 214 and the cutting edge portions of the working portion 214 rotate about a different axis than the central axis 220.

[0041] As the working portion 214 is rotated, the cutting edge portions of the working portion 214 become exposed as they rise above the cutting edge 212 of the concaveshaped portion 210. In other words, during a round of rotation, the cutting edge portions of the working portion 214 become higher than a cutting edge 212 of the concaveshaped portion 210.

[0042] The powered rotation of the cutting edge portions of the working portion 214 can cut tissue, bone, or a combination of tissue and bone, which otherwise would be difficult or impossible to cut with the cutting edge 212. According to some embodiments, for example, the cutting edge portions of the working portion 214 can act to tear, gouge, or chisel tissue, bone, or a combination of tissue and bone. The cutting edge portions of the working portion 214 can be composed of one or a combination of surgical stainless steel, or other materials.

[0043] When the working portion 214 is not in operation (e.g., not in use), the motor connected to the shaft 206 stops to ensure that the cutting edge portions of the working portion 214 are directed away or directed substantially away from the opening of the concave-shaped portion 210, so that the cutting edge portions are contained in the concave-shaped portion 210 (i.e. , the cutting edge portions may be towards the bottom surface of the concave-shaped portion 210). According to some embodiments, for example, the cutting edge portions are positioned so as to be located close to the lower surface of the bowl-shape and away from the opening on the upper surface. In other words, the cutting edge portions of the working portion 214 are substantially surrounded by the concave-shaped portion 210. This allows for the cutting edge 212 of the concaveshaped portion 210 to be used (e.g., for cutting or scooping of soft tissue, or for a combination of cutting and scooping soft tissue) without being hindered by the cutting edge portions of the working portion 214. The shaft 206 can include a ground portion 222 (i.e. , where material is removed from the shaft 206) or a counterweight portion disposed on the shaft 206 to rotationally balance the working portion 214.

[0044] FIGS. 3A and 3B depict schematic side views of a handheld surgical device 300, according to some embodiments. The handheld surgical device 300 includes a proximal portion 302, a distal portion 304, a handle 306, a working portion 308, an attachment region 310, a neck portion 312, a concave-shaped portion 314, a cutting edge 316, and a switch 318, wherein these elements are similar to the like features shown and described with respect to FIG. 1.

[0045] The proximal portion 302 includes a control mechanism 320 that is connected to the switch 318 and to a motor 322. The motor 322 and the control mechanism 320 are connected to a power supply 324 (e.g., a battery) for supplying power to the motor 322. When the switch 318 is activated, the control mechanism 320 allows powering of the motor 322, which rotates a shaft 326 connected to the motor 322 and the working portion 308.

[0046] Rotating the working portion 308 rotates one or more cutting edge portions of the working portion 308. FIG. 3A shows the cutting edge portion(s) of the working portion 308 exposed out of the concave-shaped portion 314 (e.g., the motor is activated). FIG. 3B shows a state of the motor having been powered down (i.e., the shaft 326 is not rotating), and in this state, one or more of the control mechanism 320 and the motor 322 ensures that the cutting edge portion(s) of the working portion 308 is contained in the concave-shaped portion 314, so that the cutting edge portion(s) is not in the way of the cutting edge 316.

[0047] The shaft 326 can include a ground portion 330 (i.e., where material is removed from the shaft 326) or a counterweight portion disposed on the shaft 326 to rotationally balance the working portion 308.

[0048] FIGS. 4A and 4B show side views of portions of the shaft and working portion of the embodiment of the handheld surgical device 300 shown in FIGS. 3A and 3B. FIG. 5 shows an end view of a portion of the working portion of the handheld surgical device 300. The shaft 326 includes the working portion 308 and the ground portion 330. The working portion 308 includes a first surface 404 and a second surface 406 that is located on an opposite side of the working portion 308 from the first surface 404. The working portion 308 includes a first cutting edge portion 408 and a second cutting edge portion 410 that is located on an opposite side of the working portion 308 from the first cutting edge portion 408. The first cutting edge portion 408 and the second cutting edge portion 410 extend towards an outer circumference of the shaft 326. According to some embodiments, the first cutting edge portion 408 and / or the second cutting edge portion 410 can extend beyond the circumference.

[0049] The first cutting edge portion 408 is formed between the first surface 404 and the second surface 406 such that the first cutting edge portion 408 connects the first surface 404 and the second surface 406. The second cutting edge portion 410 is formed between the first surface 404 and the second surface 406 such that the second cutting edge portion 410 connects the first surface 404 and the second surface 406. The first surface 404 has a curved or concave shape that extends along a length of the working portion 308. The second surface 406 has a curved or concave shape that extends along the length of the working portion 308. In some embodiments, the first cutting edge portion 408 and the second cutting edge portion 410 are substantially parallel.

[0050] The working portion 308 has a center of mass that is shifted away or offset from the central axis 400 of the shaft 326. When in operation the shaft 326 rotates the working portion 308. Because the center of mass of the working portion 308 is shifted away from the central axis 400, the working portion 308 (including the first cutting edge portion 408 and the second cutting edge portion 410) rotates about an axis 402 that is different from and / or offset from and / or shifted away from the central axis 400 of the shaft 326.

[0051] In some embodiments, the first surface 404 and / or the second surface 406 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 408 and / or the second cutting edge portion 410. According to some embodiments, for example, as the working portion 308 rotates and the first cutting edge portion 408 and the second cutting edge portion 410 cut material (e.g., bone or tissue), the curved or concave shape of the first surface 404 and / or the second surface 406 scoop or otherwise collect the cut material. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first surface 404 and / or the second surface 406 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 408 and / or the second cutting edge portion 410. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first cutting edge portion 408 and / or the second cutting edge portion 410 are configured or shaped to perform the function of scooping or otherwise collecting material (e.g., bone or tissue) that is cut by the first cutting edge portion 408 and / or the second cutting edge portion 410.

[0052] FIG. 6 shows an end view of another embodiment of a portion of the working portion of the handheld surgical device. The working portion 500 includes a first surface 502 and a second surface 504. The working portion 500 includes a first cutting edge portion 506 that extends towards an outer circumference of the shaft. According to some embodiments, the first cutting edge portion 506 can extend beyond the circumference. The first cutting edge portion 506 is located between the first surface 502 and the second surface 504. In some embodiments, the first surface 502 and / or the second surface 504 are curved, convex, or angled in whole or in part.

[0053] In some embodiments, the first surface 502 and / or the second surface 504 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 506. According to some embodiments, for example, as the working portion 500 rotates and the first cutting edge portion 506 cuts material (e.g., bone or tissue), the first surface 502 and / or the second surface 504 may scoop or otherwise collect the cut material. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first surface 502 and / or the second surface 504 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 506. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first cutting edge portion 506 are configured or shaped to perform the function of scooping or otherwise collecting material (e.g., bone or tissue) that is cut by the first cutting edge portion 506.

[0054] FIG. 7 shows an end view of another embodiment of a portion of the working portion of the handheld surgical device. The working portion 600 includes a first surface 602 and a second surface 604. The working portion 600 includes first cutting edge portion 606 and second cutting edge portion 608 that extend towards an outer circumference of the shaft. According to some embodiments, the first cutting edge portion 606 and / or the second cutting edge portion 608 can extend beyond the circumference. In some embodiments, the first surface 602 and the second surface 604 are positioned such that an angle between 90 degrees and 180 degrees is formed between the first surface 602 and the second surface 604. In some embodiments, the first surface 602 and / or the second surface 604 are curved, convex, or angled in whole or in part.

[0055] A collecting portion 614 may be formed such that at least a portion of the collecting portion 614 may be located on an opposite side of the working portion 600 from a least a portion of the first surface 602 and / or the second surface 604. The collecting portion 614 is formed by a third surface 610 and a fourth surface 612. The third surface 610 may be located on an opposite side of the working portion 600 from the first surface 602, and the fourth surface 612 may be located on an opposite side of the working portion 600 from the second surface 604. In some embodiments, the collecting portion 614 is generally or substantially V-shaped.

[0056] In some embodiments, the first surface 602 and / or the second surface 604 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 606 and / or the second cutting edge portion 608. According to some embodiments, for example, as the working portion 600 rotates and the first cutting edge portion 606 and the second cutting edge portion 608 cut material (e.g., bone or tissue), the first surface 602 and / or the second surface 604 may scoop or otherwise collect the cut material. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first surface 602 and / or the second surface 604 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 606 and / or the second cutting edge portion 608. According to some embodiments, for example, the collecting portion 614 may be configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 606 and / or the second cutting edge portion 608. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first cutting edge portion 606 and / or the second cutting edge portion 608 are configured or shaped to perform the function of scooping or otherwise collecting material (e.g., bone or tissue) that is cut by the first cutting edge portion 606 and / or the second cutting edge portion 608.

[0057] FIG. 8 shows a perspective view of another embodiment of a portion of the working portion of the handheld surgical device. The working portion 700 includes a first surface 702 and a second surface 704. The working portion 700 includes a first cutting edge portion 706 and a second cutting edge portion 708 that extend towards an outer circumference of the shaft. According to some embodiments, the first cutting edge portion 706 and / or the second cutting edge portion 708 can extend beyond the circumference. In some embodiments, the first surface 702 and the second surface 704 are positioned such that an angle between 90 degrees and 180 degrees is formed between the first surface 702 and the second surface 704. In some embodiments, the first surface 702 and / or the second surface 704 are curved, convex, or angled in whole or in part.

[0058] A collecting portion 714 may be formed such that at least a portion of the collecting portion 714 may be located on an opposite side of the working portion 700 from at least a portion of the first surface 702 and / or the second surface 704. The collecting portion 714 is formed by a third surface 710 and a fourth surface 712. The third surface 710 may be located on an opposite side of the working portion 700 from the first surface 702, and the fourth surface 712 may be located on an opposite side of the working portion 700 from the second surface 704. In some embodiments, the collecting portion 714 is generally or substantially V-shaped. The first cutting edge portion 706 extends along an end of the first surface 702. The second cutting edge portion 708 extends along the second surface 704, which extends from a distal end of the first surface 702 towards and / or in the direction of an outer circumference of the shaft.

[0059] In some embodiments, the first surface 702 and / or the second surface 704 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 706 and / or the second cutting edge portion 708. According to some embodiments, for example, as the working portion 700 rotates and the first cutting edge portion 706 and the second cutting edge portion 708 cut material (e.g., bone or tissue), the first surface 702 and / or the second surface 704 may scoop or otherwise collect the cut material. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first surface 702 and / or the second surface 704 are configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 706 and / or the second cutting edge portion 708. According to some embodiments, for example, collecting portion 714 may be configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 706 and / or the second cutting edge portion 708. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first cutting edge portion 706 and / or the second cutting edge portion 708 are configured or shaped to perform the function of scooping or otherwise collecting material (e.g., bone or tissue) that is cut by the first cutting edge portion 706 and / or the second cutting edge portion 708.

[0060] FIG. 9 shows an end view of another embodiment of a portion of the working portion of the handheld surgical device. The working portion 800 includes a first surface 802. In some embodiments, the first surface 802 is curved, convex, or angled in whole or in part. The working portion 800 includes a first cutting edge portion 804, a second cutting edge portion 806, and a third cutting edge portion 808 that extend towards an outer circumference of the shaft. According to some embodiments, one or more of the cutting edge portions 804, 806, 808 can extend beyond the circumference. The first cutting edge portion 804 extends along a first end or side of the first surface 802 along the working portion 800. The second cutting edge portion 806 extends along a second end or side of the first surface along the working portion 800. The third cutting edge portion 808 extends along a projection that extends from a distal end of the first surface 802.

[0061] A first collecting portion 814 may be formed such that at least a portion of the first collecting portion 814 may be located on an opposite side of the working portion 800 from at least a portion of the first surface 802. The first collecting portion 814 is formed by a second surface 810 and a third surface 812. In some embodiments, the first collecting portion 814 is generally or substantially V-shaped. The angle formed between the second surface 810 and the third surface 812 is between 0 degrees and 90 degrees. In some embodiments, the angle formed between the second surface 810 and the third surface 812 is between 90 degrees and 180 degrees.

[0062] A second collecting portion 820 may be formed such that at least a portion of the second collecting portion 820 may be located on an opposite side of the working portion 800 from at least a portion of the first surface 802. The second collecting portion 820 is formed by a fourth surface 816 and a fifth surface 818. The second collecting portion 820 is generally or substantially V-shaped. The angle formed between the fourth surface 816 and the fifth surface 818 is between 90 degrees and 180 degrees. In some embodiments, the angle formed between the fourth surface 816 and the fifth surface 818 is between 0 degrees and 90 degrees.

[0063] The third cutting edge portion 808 is located at an end of the third surface 812 and an end of the fourth surface 816. According to some embodiments, for example, the third surface 812 and the fourth surface 816 may form a projection that extends from a distal end of the first surface 802. The projection extends from the distal end of the first surface 802 at an angle between 0 degrees and 90 degrees. In some embodiments, the projection extends from the distal end of the first surface 802 at an angle between 90 degrees and 180 degrees. A top portion of the third cutting edge portion 808 may extend from the third surface 812 and a bottom portion of the third cutting edge portion 808 may extend from the fourth surface 816 such that the third cutting edge portion 808 extends along a length of the working portion 800.

[0064] In some embodiments, the first surface 802 is configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808. According to some embodiments, for example, as the working portion 800 rotates and the first cutting edge portion 804, the second cutting edge portion 806, and the third cutting edge portion 808 cut material (e.g., bone or tissue), the first surface 802 may scoop or otherwise collect the cut material. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first surface 802 is configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808. According to some embodiments, for example, the first collecting portion 814 may be configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808. In addition, or alternatively, the second collecting portion 820 may be configured or shaped to perform the function of scooping or otherwise collecting (e.g., bone or tissue) that is cut by the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808. In some embodiments, one or more surfaces forming, opposing, surrounding, or adjacent to the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808 are configured or shaped to perform the function of scooping or otherwise collecting material (e.g., bone or tissue) that is cut by the first cutting edge portion 804 and / or the second cutting edge portion 806 and / or the third cutting edge portion 808.

[0065] FIG. 10 shows a perspective view of another embodiment of a portion of the working portion of the handheld surgical device. The working portion 900 includes a first surface 902, a cutting edge portion 904, a second cutting edge portion 906, a third cutting edge portion 908, a third surface 910, a fourth surface 912, a first collecting portion 914, a fifth surface 916, a sixth surface 918, and a second collecting portion 920, wherein these elements are similar to the like features shown and described with respect to FIG. 9. The embodiment shown in FIG. 10 differs from the embodiment shown in FIG. 9 in that the projection may extend from a distal end of the first surface 902 in a fluted or curved configuration.

[0066] The third cutting edge portion 908 is located at an end of the fourth surface 912 an end of the fifth surface 916. The fourth surface 912 and / or the fifth surface 916 may be curved or convex. According to some embodiments, for example, the fourth surface 912 and the fifth surface 916 may form a projection that extends from a distal end of the first surface 902. The projection extends from the distal end of the first surface 902 at an angle between 0 degrees and 90 degrees. In some embodiments, the projection extends from the distal end of the first surface 902 at an angle between 90 degrees and 180 degrees. A top portion of the third cutting edge portion 908 may extend from the fourth surface 912 and a bottom portion of the third cutting edge portion 908 may extend from the fifth surface 916 such that the third cutting edge portion 908 extends along a length of the working portion 900 and forms a fluted edge portion.

[0067] FIG. 11 depicts a schematic view of a portion of a handheld surgical device 1000. The distal portion 1002 of the handheld surgical device 1000 includes a housing 1004 that encases a shaft 1006. The shaft 1006 includes and / or is connected to a working portion 1012. The working portion 1012 includes one or more cutting edges or cutting edge portions that extend towards an outer circumference of the shaft. According to some embodiments, one or more cutting edges can extend beyond the circumference as well. Accordingly, when the shaft 1006 rotates, the cutting edge portions rotate for cutting (e.g., bone, flesh, etc.). The shaft 1006 can include a ground portion 1008 (i.e., where material is removed from the shaft 1006) or a counterweight portion disposed on the shaft 1006 to rotationally balance the working portion 1012. The housing 1004 includes a concave portion 1010. These above-described elements are similar to the like features shown and described with respect to FIGS. 1 -3. The embodiment shown in FIG. 11 differs from the embodiments shown in FIGS. 1 -3 in that the concave portion 1010 is flush with (or substantially flush with) the housing 1004. In other words, the concave portion 1010 does not extend above or below the housing 1004.

[0068] The terminology used in this Specification is intended to describe particular embodiments and is not intended to be limiting. The terms “a,” “an,” and “the” include the plural forms as well, unless clearly indicated otherwise.

[0069] Aspects:

[0070] Any of the following aspects can be combined with any one or more of the other aspects.

[0071] Aspect 1. A handheld surgical device, comprising: a shaft configured to be rotated about a central axis by a motor, the shaft including: a working portion including: a center of mass that is shifted away from the central axis; and at least one cutting edge portion extending towards an outer circumference of the shaft.

[0072] Aspect 2. The handheld surgical device of aspect 1 , further comprising a proximal portion and a distal portion, wherein the distal portion includes a housing that at least partially encases the shaft, and wherein the distal portion further includes a concaveshaped portion having a cutting edge.

[0073] Aspect 3. The handheld surgical device of any one or more of aspects 1 -2, wherein the shaft further includes a ground portion configured to rotationally balance the working portion.

[0074] Aspect 4. The handheld surgical device of any one or more of aspects 1 -3, wherein the proximal portion includes a motor, wherein when the motor is not activated by power, the working portion is contained in the concave-shaped portion.

[0075] Aspect 5. The handheld surgical device of any one or more of aspects 1 -4, wherein when the motor is activated by power, the motor rotates the shaft and the working portion so that at least a portion of the working portion becomes exposed out from the concaveshaped portion as the working portion rotates.

[0076] Aspect 6. The handheld surgical device of any one or more of aspects 1 -5, wherein the proximal portion further includes a control mechanism and a power supply.

[0077] Aspect 7. The handheld surgical device of any one or more of aspects 1 -6, wherein the control mechanism, the power supply, and the motor are connected together.

[0078] Aspect 8. The handheld surgical device of any one or more of aspects 1 -7, wherein the power supply is a battery.

[0079] Aspect 9. The handheld surgical device of any one or more of aspects 1 -8, wherein the control mechanism controls power supplied to or not supplied from the power supply to the motor.

[0080] Aspect 10. The handheld surgical device of any one or more of aspects 1 -9, wherein the at least one cutting edge portion is formed between two surfaces, wherein a first surface of the two surfaces has a curved shape that extends along a length of the working portion, and a second surface of the two surfaces has a curved shape that extends along the length of the working portion.

[0081] Aspect 11. The handheld surgical device of any one or more of aspects 1 -10, wherein the at least one cutting edge portion includes a first cutting edge portion and a second cutting edge portion.

[0082] Aspect 12. The handheld surgical device of any one or more of aspects 1 -11 , wherein the at least one cutting edge portion includes a first cutting edge portion, a second cutting edge portion, and a third cutting edge portion.

[0083] Aspect 13. The handheld surgical device of any one or more of aspects 1 -12, wherein the first cutting edge portion and the second cutting edge portion are substantially parallel.

[0084] Aspect 14. The handheld surgical device of any one or more of aspects 1 -13, wherein the working portion further includes a first surface and a second surface, wherein the first cutting edge portion is located on an opposite side of the working portion from the second cutting edge portion, wherein the first cutting edge portion is located between the first surface and the second surface, and wherein the second cutting edge portion is located between the first surface and the second surface.

[0085] Aspect 15. The handheld surgical device of any one or more of aspects 1 -14, wherein the working portion further includes a first surface and a second surface adjacent to the first surface, wherein the first surface and the second surface are positioned such that an angle between 90 degrees and 180 degrees is formed between the first surface and the second surface.

[0086] Aspect 16. The handheld surgical device of any one or more of aspects 1 -15, wherein the working portion further includes a first curved surface, wherein the first cutting edge portion extends along an end of the first curved surface, wherein the second cutting edge portion extends along a projection that extends from a distal end of the first curved surface towards the outer circumference of the shaft.

[0087] Aspect 17. The handheld surgical device of any one or more of aspects 1 -16, wherein at least one of the first cutting edge portion, the second cutting edge portion, and the third cutting edge portion includes a fluted edge portion.

[0088] Aspect 18. The handheld surgical device of any one or more of aspects 1 -17, wherein the working portion further includes a first curved surface, wherein the first cutting edge portion and the second cutting edge portion extend along opposite ends of the first curved surface, wherein the third cutting edge portion extends along a projection that extends from a distal end of the first curved surface towards the outer circumference of the shaft.

[0089] Aspect 19. The handheld surgical device of any one or more of aspects 1 -18, wherein the projection extends from the distal end of the first curved surface in a fluted configuration.

[0090] Aspect 20. A surgical device comprising: an electric motor; a shaft, wherein the shaft has a first end connected to the electric motor, the shaft being configured to be rotated about a central axis by the electric motor; and a working portion, where in the working portion is connected to the shaft at a second end that is opposite to the first end, the working portion includes: a center of mass being shifted away from the central axis of the shaft along a radial direction of the central axis, and at least one cutting edge portion, and a first curved surface, wherein the at least one cutting edge portion is disposed at an end of the first curved surface such that the at least one cutting edge portion is disposed at outer circumference portion of the working portion.

[0091] With regard to the preceding description, it is to be understood that changes may be made in detail, especially in matters of the construction materials employed and the shape, size, and arrangement of parts without departing from the scope of the present disclosure. The embodiments described are exemplary only. Other and further embodiments may be devised without departing from the basic scope thereof, with the true scope and spirit of the disclosure being indicated by the claims.

Claims

CLAIMSWhat is claimed is:1 . A handheld surgical device comprising: a shaft configured to be rotated about a central axis by a motor, the shaft including: a working portion including: a center of mass that is shifted away from the central axis; and at least one cutting edge portion extending towards an outer circumference of the shaft.

2. The handheld surgical device of claim 1 , further comprising a proximal portion and a distal portion, wherein the distal portion includes a housing that at least partially encases the shaft, and wherein the distal portion further includes a concave-shaped portion having a cutting edge.

3. The handheld surgical device of claims 1 or 2, wherein the shaft further includes a ground portion configured to rotationally balance the working portion.

4. The handheld surgical device of claim 2, wherein the proximal portion includes a motor, wherein when the motor is not activated by power, the working portion is contained in the concave-shaped portion.

5. The handheld surgical device of claim 4, wherein when the motor is activated by power, the motor rotates the shaft and the working portion so that at least a portion of the working portion becomes exposed out from the concave-shaped portion as the working portion rotates.

6. The handheld surgical device of claims 4 or 5, wherein the proximal portion further includes a control mechanism and a power supply.

7. The handheld surgical device of claim 6, wherein the control mechanism, the power supply, and the motor are connected together.

8. The handheld surgical device of claim 6, wherein the power supply is a battery.

9. The handheld surgical device of claim 6, wherein the control mechanism controls power supplied to or not supplied from the power supply to the motor.

10. The handheld surgical device of claims 1 or 2, wherein the at least one cutting edge portion is formed between two surfaces, wherein a first surface of the two surfaces has a curved shape that extends along a length of the working portion, and a second surface of the two surfaces has a curved shape that extends along the length of the working portion.

11. The handheld surgical device of claims 1 or 2, wherein the at least one cutting edge portion includes a first cutting edge portion and a second cutting edge portion.

12. The handheld surgical device of claims 1 or 2, wherein the at least one cutting edge portion includes a first cutting edge portion, a second cutting edge portion, and a third cutting edge portion.

13. The handheld surgical device of claim 11 , wherein the first cutting edge portion and the second cutting edge portion are substantially parallel.

14. The handheld surgical device of claim 11 , wherein the working portion further includes a first surface and a second surface, wherein the first cutting edge portion is located on an opposite side of the working portion from the second cutting edge portion, wherein the first cutting edge portion is located between the first surface and the second surface, and wherein the second cutting edge portion is located between the first surface and the second surface.

15. The handheld surgical device of claim 11 , wherein the working portion further includes a first surface and a second surface that is adjacent to the first surface, whereinthe first surface and the second surface are positioned such that an angle between 90 degrees and 180 degrees is formed between the first surface and the second surface.

16. The handheld surgical device of claim 11 , wherein the working portion further includes a first curved surface, wherein the first cutting edge portion extends along an end of the first curved surface, wherein the second cutting edge portion extends along a projection that extends from a distal end of the first curved surface towards the outer circumference of the shaft.

17. The handheld surgical device of claim 12, wherein at least one of the first cutting edge portion, the second cutting edge portion, and the third cutting edge portion includes a fluted edge portion.

18. The handheld surgical device of claim 12, wherein the working portion further includes a first curved surface, wherein the first cutting edge portion and the second cutting edge portion extend along opposite ends of the first curved surface, wherein the third cutting edge portion extends along a projection that extends from a distal end of the first curved surface towards the outer circumference of the shaft.

19. The handheld surgical device of claim 18, wherein the projection extends from the distal end of the first curved surface in a fluted configuration.

20. A surgical device comprising: an electric motor; a shaft, wherein the shaft has a first end connected to the electric motor, the shaft being configured to be rotated about a central axis by the electric motor; and a working portion, where in the working portion is connected to the shaft at a second end that is opposite to the first end, the working portion includes: a center of mass being shifted away from the central axis of the shaftalong a radial direction of the central axis, and at least one cutting edge portion, and a first curved surface, wherein the at least one cutting edge portion is disposed at an end of the first curved surface such that the at least one cutting edge portion is disposed at outer circumference portion of the working portion.

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