Torque wrench and surgical device kit

Abstract

A torque wrench for connecting a first element to a second element includes a shaft extending between a first end and a second end. The torque wrench includes a first tightening sleeve at a first end. The first tightening sleeve includes a first wrench recess configured to receive the first element to tighten the first element onto the second element when the torque wrench is rotated in a tightening direction. The first tightening sleeve is connected to the first end of the shaft by a first weakened section configured to yield at a predetermined peak torque. The torque wrench includes an unscrewing sleeve separate from the first tightening sleeve. The unscrewing sleeve includes an unscrewing wrench recess configured to receive the first element to unscrew the first element from the second element when the torque wrench is rotated in the unscrewing direction. A surgical device kit is also provided.

Description

Technical Field

[0001] The subject matter herein relates generally to torque wrenches and surgical device kits. Background Art

[0002] Torque wrenches are known to be useful in many different applications, including in the assembly of surgical devices. For example, torque wrenches can be used to connect surgical attachments (such as various working tips) to handpieces (such as ultrasonic handpieces used to remove patient tissue during surgery). Known torque wrenches for medical use utilize clutch mechanisms, spring loading, or interacting parts that are movable relative to one another. However, such torque wrenches can be complex and expensive to manufacture, increasing the overall cost of surgical tools for medical providers. Furthermore, surgery requires sterilization of components used in the operating room. Due to the complexity of the components used in torque wrenches, sterilization of some known torque wrenches is difficult. Furthermore, disassembling a torque wrench for sterilization is time-consuming. Some known torque wrenches are designed to be disposable, making them inexpensive to manufacture. However, the torque parameters provided by such torque wrenches are inconsistent, resulting in over-tightening or under-tightening of components, which can lead to poor performance of surgical devices. Furthermore, some known disposable torque wrenches are designed to break when peak torque is reached, causing wrench material fragments to be deposited on surgical instruments or the surgical site, increasing risks to patients and users.

[0003] There remains a need for a torque wrench that is compact, simple in construction, inexpensive, biocompatible, sterilizable, reliable, and disposable. There remains a need for a torque wrench that is easy to use and provides repeatable and consistent application of torque for assembling different components. Summary of the Invention

[0004] The subject matter described below solves the above-mentioned problems. Advantageous embodiments of the invention are the subject matter described below.

[0005] In one embodiment, a torque wrench for connecting a first element to a second element is provided. The first element may be a surgical attachment, such as a working element used during surgery, particularly a surgical tip configured for use in conjunction with an ultrasonic surgical device. For example, the surgical attachment may be used to remove soft and / or fibrous and / or hard tissue from a patient during surgery. The second element may be a handpiece, such as a surgical handpiece, particularly an ultrasonic handpiece configured to generate ultrasonic motion in the surgical attachment. The handpiece may be part of an ultrasonic surgical device. Ultrasonic surgical devices are used in various surgical procedures, such as dissection, aspiration, coagulation, and cutting of biological tissue. Typically, ultrasonic surgical devices use a piezoelectric transducer to operate as a half-wavelength resonator by generating high-frequency wave oscillations, which cause various surgical tools to vibrate at a resonant frequency. The vibrations may be longitudinal, radial, flexural, torsional, or a combination of these. Compared to traditional surgical tools and techniques, ultrasonic surgical devices provide more precise cutting and better tissue coagulation than electrosurgical instruments, thereby reducing bleeding and damage to surrounding tissue. Additionally, ultrasonic vibrations provide less thermal damage (such as charring) and less desiccation than cryogenic or electrosurgical instruments.

[0006] A torque wrench includes a shaft extending between a first end and a second end. The shaft forms the main body of the torque wrench and can be grasped by a user. The shaft is a generally rigid body that can be grasped by the user. The shaft is sized and shaped to fit in the user's hand. The shaft may include ergonomic gripping features to facilitate gripping of the torque wrench. The shaft positions the other components of the torque wrench relative to one another. The torque wrench includes a first tightening sleeve at a first end. The first tightening sleeve defines a space for receiving a first element and for gripping the first element for tightening the first element onto a second element. The tightening sleeve is open-ended to receive the first element. The first tightening sleeve includes a first wrench recess configured to receive the first element for tightening the first element onto the second element when the torque wrench is rotated in a tightening direction. The wrench recess defines a space for receiving the first element. The wrench recess is sized and shaped to interface with the first element. The wrench recess is open to receive the first element, such as through one side of the first tightening sleeve. Tightening refers to applying a force to a first element in the direction that connects it to a second element. During tightening, the force applied to the first element increases as the torque wrench rotates until the torque wrench reaches its maximum torque and fails or yields. A first tightening sleeve is connected to the first end of a shaft via a first weakened section that is configured to yield at a predetermined torque. In the context of this application, yield can be used synonymously with failure; for example, the first tightening sleeve may be connected to the first end of a shaft via a first weakened section that is configured to fail at a predetermined torque. The first tightening sleeve can have a large cross-sectional area, thereby allowing for a high percentage error in geometry while still maintaining accurate applied torque. This enables achieving the predetermined torque within a wide range of bending deformations, i.e., achieving the predetermined torque with arm deflection angles ranging from approximately 8° to approximately 170°. The torque wrench includes a loosening sleeve separate from the tightening sleeve. The loosening sleeve includes a loosening wrench recess configured to receive the first element to loosen the first element from the second element when the torque wrench is rotated in a loosening direction. Loosening refers to applying a force to the first element in a direction that disconnects the first element from the second element.

[0007] In a preferred embodiment, the torque wrench further includes a second tightening sleeve at the second end, the second tightening sleeve including a second wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at a predetermined peak torque. This enables the user to make two tightening attempts, thereby allowing the user to make more than one attempt to correctly install, for example, an ultrasonic tip on an ultrasonic handpiece, while minimizing potential errors and consumed resources.

[0008] In a preferred embodiment, the first tightening sleeve and the second tightening sleeve are identical and face in opposite directions on opposite first and second ends of the shaft. In addition to a user-friendly design and simple construction, this ensures a reproducible tightening process.

[0009] In a preferred embodiment, the torque wrench is a disposable torque wrench, wherein the first tightening sleeve is a disposable torque sleeve that cannot be used after the first weakened section yields. In another preferred embodiment, the torque wrench is a disposable torque wrench, wherein the second tightening sleeve is a disposable torque sleeve that cannot be used after the second weakened section yields. In another preferred embodiment, the torque wrench is a disposable torque wrench, wherein the first tightening sleeve and the second tightening sleeve are disposable torque sleeves that cannot be used after the first weakened section and the second weakened section yield. Rendering the disposable tightening sleeves unusable after the weakened section yields allows for more accurate and consistent torque application and improves reliability while reducing manufacturing costs.

[0010] In a preferred embodiment, the unscrewing sleeve is reusable. This is advantageous because the user can always unscrew the first element from the second element when the torque wrench is rotated in the unscrewing direction. However, the unscrewing sleeve can also be disposable.

[0011] In a preferred embodiment, the first weakened section deforms at a predetermined peak torque. This ensures more accurate and consistent torque application and improves reliability.

[0012] In a preferred embodiment, the first weakened section deforms by bending backwards towards the axial direction. This ensures more accurate and consistent torque application and improves reliability.

[0013] In a preferred embodiment, the first weakened section is configured to deform within a range of approximately 0° to approximately 180°, with the applied torque stabilizing at a predetermined peak torque within this deformation range. This ensures more accurate and consistent torque application over a wider range and improves reliability.

[0014] In a preferred embodiment, the first weakened section includes a first neck portion having a reduced cross-sectional area compared to the shaft. In another preferred embodiment, the second weakened section includes a second neck portion having a reduced cross-sectional area compared to the shaft. In another preferred embodiment, the first weakened section includes a first neck portion having a reduced cross-sectional area compared to the shaft, and the second weakened section includes a second neck portion having a reduced cross-sectional area compared to the shaft. Having a weakened section with a neck portion having a reduced cross-sectional area compared to the shaft ensures that when a predetermined force is applied, the weakened section, rather than the shaft, will yield.

[0015] In a preferred embodiment, the first weakened section extends between the first end of the shaft and the first tightening sleeve. This ensures that when the torque wrench is rotated in the tightening direction, the technical feature is responsible for tightening the first element to the second element. That is, when a predetermined force is applied, the tightening sleeve does not yield, but the first weakened section, which is spaced apart from the tightening device, ensures that the first element is tightened more securely to the second element.

[0016] In a preferred embodiment, the first weakened section does not directly abut the first element, thereby ensuring that the first element is more securely screwed to the second element. In other words, the first weakened section is spaced apart from the first element, thereby ensuring that the first element is more securely screwed to the second element.

[0017] In a preferred embodiment, the first tightening sleeve includes an upper jaw and a lower jaw located on opposite sides of the first wrench recess, the upper jaw and the lower jaw of the first tightening sleeve having flat abutment surfaces that are configured to engage the flat abutment surfaces of the first element to rotate the first element when the torque wrench is tightened. This enables better engagement between the tightening sleeve and the first element.

[0018] In a preferred embodiment, the lower jaw is shorter than the upper jaw, thereby allowing the first element to be rotated only in the tightening direction, thereby ensuring that the first element is tightened to the second element more securely.

[0019] In a preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation, and the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. This prevents the user from placing the wrench backward onto the first element and prevents misuse of the wrench, thereby ensuring the correct fit of the wrench and the correct application of torque.

[0020] In a preferred embodiment, the loosening sleeve includes a first jaw and a second jaw on opposite sides of the loosening wrench recess, the first jaw and the second jaw having flat abutment surfaces that are configured to engage the flat abutment surfaces of the first element to rotate the first element when the torque wrench is loosened. This enables better engagement between the loosening sleeve and the first element.

[0021] In a preferred embodiment, the first tightening sleeve faces a first direction, and the loosening sleeve faces a second direction perpendicular to the first direction. In another preferred embodiment, the second tightening sleeve faces the first direction, and the loosening sleeve faces the second direction perpendicular to the first direction. In another preferred embodiment, the first tightening sleeve faces the first direction, the second tightening sleeve faces a second direction parallel to the first direction, and the loosening sleeve faces a third direction perpendicular to the first and second directions. These sleeves face different directions to allow them to be positioned in different areas of the torque wrench, such as at different ends or sides of the torque wrench. For manufacturability, the sleeves face different directions. These sleeves face different directions to achieve a compact design.

[0022] In a preferred embodiment, the first tightening sleeve and the loosening sleeve are integral with the shaft to define a one-piece torque wrench. In another preferred embodiment, the second tightening sleeve and the loosening sleeve are integral with the shaft to define a one-piece torque wrench. In another preferred embodiment, the first tightening sleeve, the second tightening sleeve, and the loosening sleeve are integral with the shaft to define a one-piece torque wrench, thereby ensuring low manufacturing costs for the torque wrench.

[0023] In a preferred embodiment, the shaft is made of a sterilizable metal material. In another preferred embodiment, the shaft is made of a biocompatible metal material. In another preferred embodiment, the shaft is made of a disposable metal material. In another preferred embodiment, the shaft is made of a sterilizable, biocompatible, and / or disposable metal material. In another preferred embodiment, any combination of these features is achievable.

[0024] In another embodiment, a torque wrench for connecting a first component to a second component is provided. The first component may be a surgical attachment, such as a surgical tip specifically configured for use with an ultrasonic surgical device. The second component may be a handpiece, specifically a surgical handpiece. The handpiece may be part of the ultrasonic surgical device. The torque wrench includes a shaft extending between a first end and a second end. The shaft forms the main body of the torque wrench and is grippable by a user. The shaft is a generally rigid body that can be gripped by a user. The shaft is sized and shaped to fit in the user's hand. The shaft may include ergonomic gripping features to facilitate gripping of the torque wrench. The shaft positions the other components of the torque wrench relative to one another. The torque wrench includes a first tightening sleeve having a first wrench recess configured to receive a first component to tighten the first component onto the second component when the torque wrench is rotated in a tightening direction. The first tightening sleeve defines a space for receiving the first component and for gripping the first component to tighten the first component onto the second component. The first tightening sleeve is open-ended to receive a first element. A sleeve, as used herein, refers to the component with which the wrench is designed to engage and to which torque is applied. A wrench recess defines a space for receiving the first element. The wrench recess is sized and shaped to interface with the first element. The wrench recess is open to receive the first element, such as through one side of the first tightening sleeve. Tightening refers to applying force to the first element in a direction that connects the first element to the second element. During tightening, the force applied to the first element increases as the torque wrench rotates until the torque wrench reaches its maximum torque and fails, or yields. The first tightening sleeve is connected to the first end of the shaft via a first weakened section, which is configured to yield at a predetermined peak torque. In the context of this application, yield can be used synonymously with failure; for example, the first tightening sleeve can be connected to the first end of the shaft via a first weakened section, which is configured to fail at a predetermined torque. The first tightening sleeve can have a large cross-sectional area to allow for a high percentage error in geometry while still maintaining accurate torque application. This enables a predetermined torque to be achieved within a wide range of bending deformation, i.e., a predetermined torque can be achieved with an arm deflection angle of approximately 8° to approximately 170°. The torque wrench includes a second tightening sleeve comprising a second wrench recess configured to receive a first element to tighten the first element onto the second element when the torque wrench is rotated in a tightening direction. Tightening refers to applying a force to the first element in the direction connecting the first element to the second element. When tightening, the force applied to the first element increases as the torque wrench rotates until the torque wrench reaches maximum torque and fails or yields. The second tightening sleeve is connected to the second end of the shaft via a second weakened section, which is configured to yield at peak torque. The second tightening sleeve can have a large cross-sectional area, thereby allowing a high percentage error in geometry while still maintaining accurate applied torque.This enables a predetermined torque to be achieved within a wide bending deformation range, ie, a predetermined torque can be achieved and the arm deflects at a deflection angle of about 8° to about 170°.

[0025] In a preferred embodiment, the first tightening sleeve and the second tightening sleeve are identical and face in opposite directions on opposite first and second ends of the shaft. In addition to a user-friendly design and simple construction, this ensures a reproducible tightening process.

[0026] In a preferred embodiment, the torque wrench is a disposable torque wrench, wherein the first tightening sleeve is a disposable torque sleeve that cannot be used after the first weakened section yields. In another preferred embodiment, the torque wrench is a disposable torque wrench, wherein the second tightening sleeve is a disposable torque sleeve that cannot be used after the second weakened section yields. In another preferred embodiment, the torque wrench is a dual-use disposable torque wrench, wherein the first tightening sleeve is a disposable torque sleeve that cannot be used after the first weakened section yields, and the second tightening sleeve is a disposable torque sleeve that cannot be used after the second weakened section yields. Disabling the disposable tightening sleeve after the weakened section yields allows for more accurate and consistent torque application and improves reliability while reducing manufacturing costs.

[0027] In a preferred embodiment, the unscrewing sleeve is reusable. This is advantageous because the user can always unscrew the first element from the second element when the torque wrench is rotated in the unscrewing direction. However, the unscrewing sleeve can also be disposable.

[0028] In a preferred embodiment, the first tightening sleeve and the second tightening sleeve are used for different tightening operations, so as to tighten the first component onto the second component at different times. This enables the user to make two tightening attempts, thereby allowing the user to have more than one attempt to correctly install, for example, an ultrasound tip on an ultrasound handpiece, while minimizing potential errors and consumed resources.

[0029] In a preferred embodiment, the first weakened section includes a first neck portion having a reduced cross-sectional area compared to the shaft. In another preferred embodiment, the second weakened section includes a second neck portion having a reduced cross-sectional area compared to the shaft. In another preferred embodiment, the first weakened section includes a first neck portion having a reduced cross-sectional area compared to the shaft, and the second weakened section includes a second neck portion having a reduced cross-sectional area compared to the shaft. In a preferred embodiment, the reduced cross-sectional area of ​​the second neck portion is equal to the reduced cross-sectional area of ​​the first neck portion. Having a weakened section with a neck portion having a reduced cross-sectional area compared to the shaft ensures that when a predetermined force is applied, the weakened section, rather than the shaft, will yield.

[0030] In a preferred embodiment, the first tightening sleeve includes upper and lower jaws located on opposite sides of the first wrench recess, the upper and lower jaws of the first tightening sleeve having flat abutment surfaces configured to engage the flat abutment surfaces of the first element to rotate the first element when the torque wrench is tightened. In another preferred embodiment, the second tightening sleeve includes upper and lower jaws located on opposite sides of the second wrench recess, the upper and lower jaws of the second tightening sleeve having flat abutment surfaces configured to engage the flat abutment surfaces of the first element to rotate the first element when the torque wrench is tightened. In another preferred embodiment, the first tightening sleeve includes an upper jaw and a lower jaw located on opposite sides of the first wrench recess, the upper jaw and the lower jaw of the first tightening sleeve having flat abutment surfaces configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is tightened, and the second tightening sleeve includes an upper jaw and a lower jaw located on opposite sides of the second wrench recess, the upper jaw and the lower jaw of the second tightening sleeve having flat abutment surfaces configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is tightened. This enables better engagement between the tightening sleeve and the first element.

[0031] In a preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation, and the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. This prevents the user from placing the wrench backward onto the first element and prevents misuse of the wrench, thereby ensuring the correct fit of the wrench and the correct application of torque.

[0032] In a preferred embodiment, the torque wrench further includes a loosening sleeve along the shaft, the loosening sleeve including a loosening wrench recess configured to receive the first element to loosen the first element from the second element when the torque wrench is rotated in a loosening direction. Loosening refers to applying a force to the first element in a direction that disconnects the first element from the second element. This ensures that the first and second elements can always be separated, thereby maintaining a secure connection between the first and second elements.

[0033] In another embodiment, a surgical device kit is provided, including a surgical attachment extending between a proximal end and a distal end. The surgical attachment may be, for example, a surgical tip specifically configured for use with an ultrasonic surgical device. The proximal end is configured to removably couple to a handpiece, particularly a surgical handpiece. The distal end includes a working element for performing surgery. The working element is configured to interface with a patient. The working element includes features for engaging the patient and performing the surgical procedure. For example, the working element may include a cutting element for cutting patient tissue. The surgical attachment includes a torque wrench interface. The torque wrench interface is a portion of the surgical attachment configured to interface with a torque wrench. For example, the torque wrench interface includes surfaces or features configured to interface with a torque wrench for tightening the surgical attachment to the surgical handpiece. The surgical device kit includes a torque wrench configured to interface with the surgical attachment at the torque wrench interface for tightening the surgical attachment to the handpiece to a predetermined peak torque and for loosening the surgical attachment from the handpiece. Tightening refers to applying a force to a first element in a direction that connects the first element to a second element. When tightening, the force applied to the first element increases as the torque wrench rotates until the torque wrench reaches maximum torque and fails or yields. Loosening refers to applying force to the first element in a direction that disconnects the first element from the second element. A torque wrench includes a shaft extending between a first end and a second end, and a first tightening sleeve at the first end. The shaft forms the main body of the torque wrench and can be grasped by the user. The shaft is a generally rigid body that can be grasped by the user. The shaft is sized and shaped to fit in the user's hand. The shaft may include ergonomic gripping features to facilitate gripping the torque wrench. The shaft positions the other components of the torque wrench relative to each other. The first tightening sleeve defines a space for receiving the first element and for gripping the first element to tighten it onto the second element. The first tightening sleeve is open-ended to receive the first element. A sleeve, as used herein, refers to the component with which the wrench is designed to engage and to which torque is applied. Tightening refers to applying force to the first element in a direction that connects the first element to the second element. When tightening, the force applied to the first element increases as the torque wrench rotates until the torque wrench reaches maximum torque and fails or yields. The first tightening sleeve includes a first wrench recess that is configured to receive a surgical attachment at the torque wrench interface to tighten the surgical attachment to the handpiece as the torque wrench is rotated in a tightening direction. The wrench recess defines a space for receiving the first element. The wrench recess is sized and shaped to interface with the first element. The wrench recess is open to receive the first element, such as through one side of the first tightening sleeve. The first tightening sleeve is connected to the first end of the shaft by a first weakened section that is configured to yield at peak torque. The first tightening sleeve can have a large cross-sectional area, thereby allowing a high percentage error in geometry while still maintaining accurate applied torque.This enables the predetermined torque to be achieved within a wide bending deformation range, i.e., the predetermined torque can be achieved with an arm deflection angle of about 8° to about 170°. The loosening sleeve is separate from the first tightening sleeve. The loosening sleeve includes a loosening wrench recess configured to receive the surgical attachment at the torque wrench interface to loosen the surgical attachment from the handpiece when the torque wrench is rotated in a loosening direction.

[0034] In a preferred embodiment, the torque wrench further includes a second tightening sleeve at the second end, the second tightening sleeve including a second wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at a predetermined peak torque. This enables the user to make two tightening attempts, thereby allowing the user to make more than one attempt to correctly install, for example, an ultrasonic tip on an ultrasonic handpiece, while minimizing potential errors and consumed resources.

[0035] In a preferred embodiment, the surgical device kit further comprises a sleeve configured to surround the surgical attachment, the sleeve being configured to be coupled to the handpiece. Thus, a proper grip is ensured, thereby protecting the user and providing an irrigation route.

[0036] In a preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. In another preferred embodiment, the first tightening sleeve includes a first keying feature that is configured to interface with the first element in only one orientation, and the second tightening sleeve includes a second keying feature that is configured to interface with the first element in only one orientation. This prevents the user from placing the wrench backward onto the first element and prevents misuse of the wrench, thereby ensuring the correct fit of the wrench and the correct application of torque.

[0037] In another embodiment, a method for attaching a first component to a second component is provided. The first component may be a surgical attachment, such as a surgical tip specifically configured for use with an ultrasonic surgical device. The second component may be a handpiece, specifically a surgical handpiece. The handpiece may be part of the ultrasonic surgical device. The method includes providing a torque wrench comprising a shaft extending between a first end and a second end, a first tightening sleeve at the first end, and a loosening sleeve separate from the first tightening sleeve. The shaft forms the main body of the torque wrench and is grippable by a user. The shaft is a generally rigid body that can be gripped by a user. The shaft is sized and shaped to fit in the user's hand. The shaft may include ergonomic gripping features to facilitate gripping of the torque wrench. The shaft positions the other components of the torque wrench relative to one another. The first tightening sleeve defines a space for receiving the first component and for gripping the first component to tighten the first component onto the second component. The first tightening sleeve is open-ended to receive the first component. A sleeve, as used herein, refers to the component with which the wrench is designed to engage and to which torque is applied. The first tightening sleeve includes a first wrench recess configured to receive a first element. The wrench recess defines a space for receiving the first element. The wrench recess is sized and shaped to interface with the first element. The wrench recess is open to receive the first element, such as through one side of the first tightening sleeve. The first tightening sleeve is connected to the first end of the shaft via a first weakened section, which is configured to yield at a predetermined peak torque. In the context of this application, yield can be used synonymously with failure. For example, the first tightening sleeve may be connected to the first end of the shaft via a first weakened section, which is configured to fail at a predetermined torque. The first tightening sleeve can have a large cross-sectional area, thereby allowing for a high percentage tolerance in geometry while still maintaining accurate applied torque. This enables achieving the predetermined torque over a wide range of bending deformations, i.e., achieving the predetermined torque with an arm deflection angle of approximately 8° to approximately 170°. The loosening sleeve includes a loosening wrench recess configured to receive the first element. The method couples the first tightening sleeve to the first element. The method involves rotating a torque wrench in a tightening direction using a first tightening sleeve to tighten a first component onto a second component, wherein a first weakened section of the torque wrench yields when the first component is tightened to a peak torque. Tightening refers to applying a force to the first component in a direction that connects the first component to the second component. During tightening, the force applied to the first component increases as the torque wrench rotates until the torque wrench reaches maximum torque and fails or yields. The method couples a loosening sleeve to the first component. The method rotates the torque wrench in a loosening direction to loosen the first component from the second component using the loosening sleeve. Loosening refers to applying a force to the first component in a direction that disconnects the first component from the second component.

[0038] In a preferred embodiment, coupling the first tightening sleeve to the first component includes aligning the first keyed interface of the first tightening sleeve with the keyed interface of the first component. This prevents the user from placing the wrench backward onto the first component and misusing the wrench, thereby ensuring the correct fit of the wrench and the correct application of torque.

[0039] In a preferred embodiment, the first tightening sleeve includes upper and lower jaws on opposite sides of the first wrench recess, the upper and lower jaws of the first tightening sleeve having flat abutment surfaces, and coupling the first tightening sleeve to the first component includes engaging the flat abutment surfaces of the upper and lower jaws with the flat abutment surfaces of the first component to rotate the first component when tightening the torque wrench. This enables better engagement between the tightening sleeve and the first component.

[0040] In a preferred embodiment, a torque wrench is provided that includes a second tightening sleeve at the second end of the shaft, the second tightening sleeve including a second wrench recess configured to receive the first element to tighten the first element onto the second element, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at a predetermined peak torque, wherein the second tightening sleeve allows a second tightening operation to be performed with the torque wrench before disposing of the torque wrench. This enables the user to make two tightening attempts, thereby allowing the user to make more than one attempt to correctly install, for example, an ultrasound tip onto an ultrasound handpiece, while minimizing potential errors and consumed resources.

[0041] In a preferred embodiment, the method further comprises coupling a second tightening sleeve to the first component; and rotating the torque wrench in a tightening direction using the second tightening sleeve to tighten the first component onto the second component, wherein the second weakened section of the torque wrench yields when the first component is tightened to a predetermined peak torque. This enables the user to make two tightening attempts, thereby allowing the user to make more than one attempt to correctly install, for example, an ultrasound tip onto an ultrasound handpiece, while minimizing potential errors and consumed resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A torque wrench for tightening and loosening a first component relative to a second component is illustrated according to an exemplary embodiment.

[0043] Figure 2 is an enlarged view of a torque wrench coupled to a first component for tightening the first component to a second component according to an exemplary embodiment.

[0044] Figure 3 A torque wrench is illustrated coupled to a first component, the torque wrench unscrewing the first component from a second component, according to an exemplary embodiment.

[0045] Figure 4 is an exploded view of a surgical device that may be assembled using a first component and a second component according to an exemplary embodiment.

[0046] Figure 5 A first component is shown ready to be coupled to a second component according to an exemplary embodiment.

[0047] Figure 6 A torque wrench according to an exemplary embodiment is illustrated.

[0048] Figure 7 A torque wrench according to an exemplary embodiment is illustrated.

[0049] Figure 8 A torque wrench according to an exemplary embodiment is illustrated.

[0050] Figure 9 A torque wrench according to an exemplary embodiment is illustrated.

[0051] Figure 10 A torque wrench according to an exemplary embodiment is illustrated.

[0052] Figure 11 A torque wrench according to an exemplary embodiment is illustrated.

[0053] Figure 12 A torque wrench according to an exemplary embodiment is illustrated.

[0054] Figure 13 is a top perspective view of a portion of a torque wrench showing a first tightening sleeve according to an exemplary embodiment.

[0055] Figure 14 is a bottom perspective view of a portion of a torque wrench showing a first tightening sleeve according to an exemplary embodiment.

[0056] Figure 15 is a bottom perspective view of a portion of a torque wrench showing a second tightening sleeve according to an exemplary embodiment.

[0057] Figure 16 is a top perspective view of a portion of a torque wrench showing a second tightening sleeve according to an exemplary embodiment.

[0058] Figure 17 is a front perspective view of a portion of a torque wrench 100 from the left side showing a loosening socket according to an exemplary embodiment.

[0059] Figure 18 is a front perspective view of a portion of a torque wrench from the right side showing a loosening socket according to an exemplary embodiment.

[0060] Figure 19 A torque wrench according to an exemplary embodiment is illustrated, wherein a first tightening sleeve is coupled to a first element and is configured to be tightened by rotating the torque wrench in a tightening direction.

[0061] Figure 20 A torque wrench is illustrated according to an exemplary embodiment wherein a first tightening sleeve is incorrectly aligned with a first component and cannot be coupled to the first component.

[0062] Figure 21 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0063] Figure 22 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0064] Figure 23 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0065] Figure 24 is a top view of a torque wrench according to an exemplary embodiment.

[0066] Figure 25 is a front view of a torque wrench according to an exemplary embodiment.

[0067] Figure 26 is a rear view of a torque wrench according to an exemplary embodiment.

[0068] Figure 27 is a bottom view of a torque wrench according to an exemplary embodiment.

[0069] Figure 28 is a right side view of a torque wrench according to an exemplary embodiment.

[0070] Figure 29 is a left side view of a torque wrench according to an exemplary embodiment.

[0071] Figure 30 A first component is shown ready to be loaded onto a second component according to an exemplary embodiment.

[0072] Figure 31 A torque wrench is illustrated according to an exemplary embodiment being used to tighten a first component onto a second component.

[0073] Figure 32 A torque wrench is illustrated according to an exemplary embodiment being used to unscrew a first component from a second component.

[0074] Figure 33 A first element is shown removed from a second element according to an exemplary embodiment.

[0075] Figure 34A torque wrench according to an exemplary embodiment is illustrated.

[0076] Figure 35 A torque wrench according to an exemplary embodiment is illustrated.

[0077] Figure 36 A torque wrench according to an exemplary embodiment is illustrated.

[0078] Figure 37 A torque wrench according to an exemplary embodiment is illustrated.

[0079] Figure 38 A torque wrench according to an exemplary embodiment is illustrated.

[0080] Figure 39 A torque wrench according to an exemplary embodiment is illustrated.

[0081] Figure 40 is a top perspective view of a portion of a torque wrench showing a first tightening sleeve according to an exemplary embodiment.

[0082] Figure 41 is a bottom perspective view of a portion of a torque wrench showing a first tightening sleeve according to an exemplary embodiment.

[0083] Figure 42 is a bottom perspective view of a portion of a torque wrench showing a second tightening sleeve according to an exemplary embodiment.

[0084] Figure 43 is a top perspective view of a portion of a torque wrench showing a second tightening sleeve according to an exemplary embodiment.

[0085] Figure 44 is a front perspective view of a portion of a torque wrench from the right side showing a loosening socket according to an exemplary embodiment.

[0086] Figure 45 is a front perspective view of a portion of a torque wrench from the left side showing a loosening socket according to an exemplary embodiment.

[0087] Figure 46 is a front perspective view of a portion of a torque wrench showing a loosening socket according to an exemplary embodiment.

[0088] Figure 47 is a rear perspective view of a portion of a torque wrench showing a loosening socket according to an exemplary embodiment.

[0089] Figure 48 A torque wrench according to an exemplary embodiment is illustrated, wherein a first tightening sleeve is coupled to a first element and is configured to be tightened by rotating the torque wrench in a tightening direction.

[0090] Figure 49 A torque wrench is illustrated according to an exemplary embodiment wherein a first tightening sleeve is incorrectly aligned with a first component and cannot be coupled to the first component.

[0091] Figure 50 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0092] Figure 51 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0093] Figure 52 A torque wrench is illustrated in a failed state according to an exemplary embodiment.

[0094] Figure 53 is a top view of a torque wrench according to an exemplary embodiment.

[0095] Figure 54 is a front view of a torque wrench according to an exemplary embodiment.

[0096] Figure 55 is a rear view of a torque wrench according to an exemplary embodiment.

[0097] Figure 56 is a bottom view of a torque wrench according to an exemplary embodiment.

[0098] Figure 57 is a right side view of a torque wrench according to an exemplary embodiment.

[0099] Figure 58 is a left side view of a torque wrench according to an exemplary embodiment.

[0100] Figure 59 is a perspective view of a surgical device kit according to an exemplary embodiment.

[0101] Figure 60 is a top view of a surgical device kit according to an exemplary embodiment. DETAILED DESCRIPTION

[0102] Figure 1 A torque wrench 100 is illustrated according to an exemplary embodiment, the torque wrench being used to tighten and loosen a first component 40 relative to a second component 60 . Figure 2 is an enlarged view of a torque wrench 100 coupled to the first element 40 for tightening the first element 40 onto the second element 60 . Figure 3A torque wrench 100 is shown coupled to a first element 40 for loosening the first element 40 from a second element 60. Tightening refers to applying a force to the first element 40 in a direction that connects the first element 40 to the second element 60. When tightening, the force applied to the first element 40 increases as the torque wrench 100 is rotated until the torque wrench 100 reaches maximum torque and fails or yields. Loosening refers to applying a force to the first element 40 in a direction that disconnects the first element 40 from the second element 60. Tightening refers to connecting the first element 40 to the second element 60. Loosening refers to reducing the force applied to the first element that is transferred to the second element as the torque wrench is rotated, and loosening refers to disconnecting the first element from the second element. In various embodiments, tightening refers to clockwise rotation and loosening refers to counterclockwise rotation, or vice versa.

[0103] In an exemplary embodiment, the torque wrench 100 is a disposable component. For example, the torque wrench 100 is configured to fail or yield at peak torque during tightening of the first element 40 onto the second element 60, ensuring that the first element 40 is properly installed on the second element 60 at a predetermined torque. In an exemplary embodiment, the torque wrench 100 is configured to deform at a predetermined torque, ensuring that the first element 40 is not overtightened when installed on the second element 60. This ensures that the rotational orientation of the first element 40 relative to the second element 60 is achieved with high accuracy and repeatability. The torque wrench 100 plastically deforms (e.g., yields) upon failure to prevent component breakage of the torque wrench 100, thereby eliminating the risk of foreign matter or component loss during assembly. In an exemplary embodiment, the torque wrench 100 is made of a metal material, such as aluminum, particularly aluminum 6061-T6, which is ductile, allowing the torque wrench 100 to plastically deform during use. In an exemplary embodiment, the torque wrench 100 is made of a sterilizable material. In an exemplary embodiment, the torque wrench 100 is made of a biocompatible material. In an exemplary embodiment, the torque wrench 100 is made of a disposable material. In an exemplary embodiment, the torque wrench 100 is made of a reliable material. The torque wrench 100 can be used with medical or surgical instruments, such as in an operating room. In an exemplary embodiment, the torque wrench 100 is a one-piece design with a unitary, monolithic structure. For example, the components used to tighten and loosen the first element 40 are part of a single, monolithic structure. In alternative embodiments, the torque wrench 100 can be made of multiple parts, such as having two wrench elements at opposite ends that can be joined together or using a handle (such as a plastic handle).

[0104] In the exemplary embodiment, the torque wrench 100 includes a shaft 110, which forms the main body of the torque wrench 100. The torque wrench 100 includes one or more tightening sleeves for tightening the first element 40 onto the second element 60. For example, in the illustrated embodiment, the torque wrench 100 includes a first tightening sleeve 200 and a second tightening sleeve 300 located at opposite ends of the shaft 110. Providing multiple tightening sleeves 200, 300 allows the first element 40 to be tightened on multiple occasions. For example, providing two tightening sleeves 200, 300 allows the torque wrench 100 to be a dual-use, disposable torque wrench. This allows the same torque wrench 100 to be used during subsequent tightening operations if the first element 40 is incorrectly installed the first time and needs to be re-torqued or replaced with a different element. For example, if the first element 40 needs to be removed to clear a blockage or if the initial installation is malfunctioning for some reason, the torque wrench 100 can be used during subsequent tightening operations. However, in alternative embodiments, the torque wrench 100 may include a single tightening sleeve 200, thereby defining a disposable torque wrench. In an exemplary embodiment, the torque wrench 100 includes a loosening sleeve 400 for loosening the first element 40 from the second element 60. The loosening sleeve 400 is reusable, allowing for loosening the first element 40 on multiple occasions. The tightening sleeves 200, 300 are configured to interface with the first element 40 to tighten the first element 40 only onto the second element 60 and prevent the first element 40 from rotating in a loosening direction. For example, the tightening sleeves 200, 300 may include a feature configured to interface with the first element 40 to rotate the first element 40 only in a tightening direction, such that the feature may slip off the first element 40 if the torque wrench 100 is rotated in the loosening direction. In contrast, the loosening sleeve 400 is configured to engage with the first element 40 to only loosen the first element 40 from the second element 60 and cannot rotate the first element 40 in the tightening direction. For example, the loosening sleeve 400 may include a feature configured to engage with the first element 40 to only rotate the first element 40 in the loosening direction, and if the torque wrench 100 is rotated in the tightening direction, such a feature may slip off the first element 40. Figure 1 and Figure 2 The first tightening sleeve 200 is shown, which is coupled to the first element 40 to perform a tightening operation by rotating the torque wrench 100 in a tightening direction (e.g., counterclockwise). The first tightening sleeve 200 is configured to interface with the first element 40 to only tighten the first element 40 onto the second element 60 and prevent the first element 40 from being rotated in a loosening direction. Figure 3 Illustrated is a loosening sleeve 400 that is coupled to the first element 40 to perform a loosening operation by rotating the torque wrench 100 in a loosening direction (eg, clockwise). Figure 3The first tightening sleeve 200 is shown deformed and in a failed or yielded state. Figure 3 The second tightening sleeve 300 is illustrated in a normal, ie correctly functioning and effective, state, which allows a second tightening operation to be performed by the torque wrench 100 before the torque wrench 100 is disposed of.

[0105] Additional references Figure 4 and Figure 5 , an exemplary embodiment of the first element 40 and the second element 60 is shown. Figure 4 is an exploded view of surgical device 30 that may be assembled using first component 40 and second component 60 . Figure 5 The first element 40 is shown ready to be coupled to the second element 60. In the illustrated embodiment, the first element 40 is a surgical attachment 42, and the second element 60 is a handpiece 62. In the exemplary embodiment, the handpiece 62 is an ultrasonic handpiece configured to generate ultrasonic motions of the surgical attachment 42. The surgical attachment 42 is a working element that can be used during a surgical procedure. For example, the surgical attachment 42 can be used to remove soft tissue, fibrous tissue, and / or hard tissue from a patient during a surgical procedure.

[0106] In various embodiments, the first element 40 is cylindrical (e.g., having a circular cross-section) and / or includes multiple cylindrical portions along the length of the first element 40. Portions of the first element 40 can be stepped, having different diameters. Portions of the first element 40 can be tapered. In alternative embodiments, the first element 40 can have other shapes, such as a rectangular cross-section.

[0107] The first element 40 extends between a proximal end 44 and a distal end 46. The proximal end 44 is configured to be coupled to the second element 60. For example, the proximal end 44 can be threadedly coupled to the second element 60. The proximal end 44 can include a threaded hole or a threaded post for threadedly coupling to the second element 60. The torque wrench 100 is used to threadably couple the proximal end 44 of the first element 40 to the second element 60. In an exemplary embodiment, the first element 40 includes a working element 48 at the distal end 46. The working element 48 is configured to perform an action, such as interfacing with patient tissue during a surgical procedure. The working element 48 can include a cutting blade, cutting teeth, a suction port, an irrigation port, and / or other surgical elements for performing a surgical procedure.

[0108] In the exemplary embodiment, the first element 40 includes a torque wrench interface 50 along an exterior of the first element 40. The torque wrench 100 is configured to engage the first element 40 at the torque wrench interface 50. In the exemplary embodiment, the first element 40 includes one or more drive elements 52 at the torque wrench interface 50. The torque wrench 100 engages the drive elements 52 to rotate the first element 40 during a tightening or loosening operation. In the exemplary embodiment, the drive elements 52 include one or more flat surfaces 54 along an exterior of the first element 40. The torque wrench 100 is configured to engage the first element 40 at the flat surfaces 54 to rotate the first element 40. In various embodiments, the flat surfaces 54 may be disposed on opposite sides of the first element 40 (e.g., along the top and bottom of the first element 40). In other various embodiments, the first element 40 may be hexagonally shaped at the torque wrench interface 50, with six flat surfaces 54 disposed on six sides of the first element 40.

[0109] The second element 60 extends between a proximal end 64 and a distal end 66. The first element 40 is configured to be coupled to the distal end 66. For example, the first element 40 can be rotatably coupled to the distal end 66. The distal end 66 can include a threaded post or a threaded hole configured to be threadedly coupled to the first element 40. In the illustrated embodiment, the second element 60 includes a threaded adapter 68 at the distal end 66. The first element 40 is configured to be threadedly coupled to the threaded adapter 68. The torque wrench 100 is used to tighten the first element 40 onto the threaded adapter 68 and to loosen the first element 40 from the threaded adapter 68. The torque wrench 100 is configured to tighten the first element 40 to a predetermined torque to ensure proper attachment of the first element 40 to the second element 60.

[0110] In the exemplary embodiment, the second element 60 includes a housing 70 that houses an ultrasonic transducer 72 that generates ultrasonic motion of the first element 40 attached to the end of the second element 60. In the exemplary embodiment, the ultrasonic transducer 72 generates torsional motion of the first element 40 along the central axis of the first element 40. The ultrasonic transducer 72 may additionally or alternatively generate longitudinal motion of the first element 40 along the central axis of the first element 40. In the exemplary embodiment, the second element 60 includes a suction port and / or an irrigation port to provide suction and / or irrigation to the surgical site.

[0111] Figures 6 to 12 A torque wrench 100 is illustrated according to an exemplary embodiment. Figure 6 It is a top right front perspective view of the torque wrench 100 . Figure 7 It is a bottom right front perspective view of the torque wrench 100 . Figure 8 It is a left front perspective view of the torque wrench 100 as viewed from above. Figure 9 It is a bottom left front perspective view of the torque wrench 100 . Figure 10 It is a right rear perspective view of the torque wrench 100 as viewed from above. Figure 11 It is a bottom right rear perspective view of the torque wrench 100 . Figure 12 It is a perspective view of the torque wrench 100 as seen from the bottom and front.

[0112] The torque wrench 100 includes a shaft 110, a first tightening sleeve 200, a second tightening sleeve 300, and a loosening sleeve 400. In alternative embodiments, the torque wrench 100 may not include the second tightening sleeve 300 and / or the loosening sleeve 400. In an exemplary embodiment, the torque wrench 100 is formed using a subtractive manufacturing process, such as using a CNC machine, manual machining, milling, cutting, or other machining methods. In various embodiments, the torque wrench 100 is stamped and formed from sheet metal (such as aluminum). In other various embodiments, the torque wrench 100 may be die-cast from a metal material. In other various embodiments, the torque wrench 100 may be extruded. In other embodiments, the torque wrench 100 may be additively manufactured. The torque wrench 100 may be lightweight and easy to hold. For example, the torque wrench 100 may have ergonomic features that allow an operator to easily manipulate the torque wrench 100 to tighten and loosen the first element 40 .

[0113] The shaft 110 extends between a first end 112 on the right side and a second end 114 on the left side. The shaft 110 includes a front portion 116 and a rear portion 118. The shaft 110 includes a top portion 120 and a bottom portion 122. In the exemplary embodiment, the first tightening sleeve 200 is disposed at the first end 112, and the second tightening sleeve 300 is disposed at the second end 114. In alternative embodiments, other positions are possible. In the exemplary embodiment, the loosening sleeve 400 is disposed at the bottom 122. In the illustrated embodiment, the loosening sleeve 400 is approximately centered between the first end 112 and the second end 114. In alternative embodiments, other positions are possible. In the exemplary embodiment, the front portion 116 and / or the rear portion 118 are planar. The front portion 116 may be parallel to the rear portion 118.

[0114] In an exemplary embodiment, the shaft 110 includes a handle 124 for gripping the torque wrench 100 during tightening and / or loosening operations. The handle 124 can be defined by gripping features 126 along the shaft 110. For example, the gripping features 126 can be defined by curved surfaces along the top 120 and / or bottom 122, thereby providing an area for an operator's fingers to ergonomically and securely grip the shaft 110 during tightening and / or loosening operations.

[0115] The first tightening sleeve 200 includes a first wrench recess 210 configured to receive the first element 40 for tightening when the torque wrench 100 is rotated in a tightening direction. In the illustrated embodiment, the first wrench recess 210 is open-ended to facilitate receiving and releasing the first element 40. However, in alternative embodiments, the first wrench recess 210 may be closed (e.g., enclosed or circumferentially surrounding the recess). The first tightening sleeve 200 is connected to the first end 112 of the shaft 110 via a first weakened section 250 configured to yield at a predetermined torque. The first weakened section 250 is located between the first wrench recess 210 and the first end 112 of the shaft 110.

[0116] The second tightening sleeve 300 includes a second wrench recess 310 configured to receive the first element 40 for tightening when the torque wrench 100 is rotated in a tightening direction. In the illustrated embodiment, the second wrench recess 310 is open-ended to facilitate receiving and releasing the first element 40. However, in alternative embodiments, the second wrench recess 310 may be closed (e.g., enclosed or circumferentially surrounding the recess). The second tightening sleeve 300 is connected to the second end 114 of the shaft 110 via a second weakened section 350 configured to yield at a predetermined torque. The second weakened section 350 is located between the second wrench recess 310 and the second end 114 of the shaft 110.

[0117] The loosening sleeve 400 is separated and detached from the first tightening sleeve 200 and the second tightening sleeve 300. For example, the loosening sleeve 400 is away from the first tightening sleeve 200 and the second tightening sleeve 300. The loosening sleeve 400 is configured to receive the first element 40 during the loosening operation. The loosening sleeve 400 includes a loosening wrench recess 410 that is configured to receive the first element 40 to loosen the first element 40 from the second element 60 when the torque wrench 100 is rotated in the loosening direction.

[0118] Figure 13 is a top perspective view of a portion of a torque wrench 100 illustrating a first tightening sleeve 200 according to an exemplary embodiment. Figure 14 is a bottom perspective view of a portion of the torque wrench 100 according to an exemplary embodiment, illustrating the first tightening sleeve 200. The first tightening sleeve 200 includes a first wrench recess 210 and a first weakened section 250 connecting the first wrench recess 210 to the first end 112 of the shaft 110.

[0119] In the exemplary embodiment, the first tightening sleeve 200 includes a first head portion 212 that forms a first wrench recess 210. The first head portion 212 includes an upper jaw 214, a lower jaw 216, and a wrench wall 218 between the upper jaw 214 and the lower jaw 216. The first wrench recess 210 is defined by the upper jaw 214, the lower jaw 216, and the wrench wall 218. In the exemplary embodiment, the first wrench recess 210 is open between the upper jaw 214 and the lower jaw 216, opposite the wrench wall 218, to receive the first element 40. For example, the first element 40 can be side-loaded into the first wrench recess 210 between the upper jaw 214 and the lower jaw 216. In the illustrated embodiment, the lower jaw 216 extends parallel to the upper jaw 214. In the illustrated embodiment, the wrench wall 218 extends perpendicular to the upper jaw 214 and / or the lower jaw 216. In alternative embodiments, the first head 212 may have other shapes.

[0120] In various embodiments, the upper jaw 214 is longer than the lower jaw 216 (the lower jaw 216 is shorter than the upper jaw 214), which provides a feature that ensures that the first tightening sleeve 200 only tightens the first component 40 in a single direction. For example, if the torque wrench 100 is rotated in the wrong direction (e.g., in a loosening direction), the short lower jaw 216 causes the first tightening sleeve 200 to immediately separate from the first component 40 instead of rotating the first component 40 in the loosening direction.

[0121] In the exemplary embodiment, the wrench wall 218 meets the upper jaw 214 at an upper corner 220, and the wrench wall 218 meets the lower jaw 216 at a lower corner 222. The corners 220 and 222 may be substantially 90° corners. Alternatively, the corners 220 and 222 may be curved. In the exemplary embodiment, the upper jaw 214, the lower jaw 216, and the wrench wall 218 each include abutment surfaces 224, 226, and 228 on their inner surfaces forming a receiving recess 230 for receiving the first element 40. In the exemplary embodiment, the abutment surfaces 224, 226, and 228 include flat surfaces that are configured to abut against the first element 40 to rotate the first element 40 in a tightening direction.

[0122] In an exemplary embodiment, the first weakened section 250 is incorporated into the upper jaw 214. For example, the upper jaw 214 is coplanar with the first weakened section 250. The upper jaw 214 can be generally aligned with the top 120 of the shaft 110. For example, the upper jaw 214 can be coplanar with the top 120 of the shaft 110. In alternative embodiments, the upper jaw 214 can be located above the top 120 of the shaft 110. For example, the first weakened section 250 can be incorporated into the wrench wall 218 or the lower jaw 216. In other various embodiments, the upper jaw 214 can be angled laterally relative to the top 120 of the shaft 110. For example, the first head 212 can be angled downward, with the upper jaw 214 and / or the first weakened section 250 oriented at a downward angle relative to the top 120 of the shaft 110. Alternatively, the first head 212 may be angled upward, with the upper jaw 214 and / or the first weakened section 250 oriented at an upward angle relative to the top 120 of the shaft 110 .

[0123] In an exemplary embodiment, the first tightening sleeve 200 includes one or more keying features 232 for keyed engagement with the first element 40. The keyed engagement with the first element 40 ensures that the first tightening sleeve 200 can only engage with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to tighten the first element 40. In an exemplary embodiment, the keying features 232 include an upper keying feature 234 on the upper jaw 214 and a lower keying feature 236 on the lower jaw 216. In alternative embodiments, either the upper keying feature 234 or the lower keying feature 236 may be omitted. In alternative embodiments, the keying features 232 may be provided in other locations. In an exemplary embodiment, the upper keying feature 234 includes a platform 235 that is stepped inwardly relative to the engagement surface 224 of the upper jaw 214. The platform 235 may have a flat surface configured to engage the first element 40 to rotate the first element 40 during the tightening process. In the illustrated embodiment, the platform 235 is positioned toward the rear of the first tightening sleeve 200. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the upper jaw 214. In the illustrated embodiment, the width of the platform 235 is approximately half the width of the upper jaw 214. However, in alternative embodiments, the platform 235 may be wider or narrower. In the exemplary embodiment, the lower keying feature 236 includes a platform 237 that is stepped inward relative to the abutment surface 226 of the lower jaw 216. The platform 237 may have a flat surface configured to abut against the first element 40 to rotate the first element 40 during tightening. In the illustrated embodiment, the platform 237 is positioned toward the rear of the first tightening sleeve 200. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the lower jaw 216. In the illustrated embodiment, the width of the platform 237 is approximately half the width of the lower jaw 216. However, in alternative embodiments, the platform 237 may be wider or narrower. In an exemplary embodiment, keying features 234, 236 are arranged (e.g., both at the rear) to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (e.g., upside down). Keying feature 232 may be an optional element. For example, in an alternative embodiment, the torque wrench 100 may not be provided with keying feature 232.

[0124] The first weakened section 250 extends between the first wrench recess 210 and the first end 112 of the shaft 110. The first weakened section 250 includes a first neck portion 252 located between the shaft 110 and the first head portion 212. The first neck portion 252 is spaced apart from the receiving recess 230 of the first wrench recess 210, allowing the first weakened section 250 to be spaced apart from the first element 40. This allows the engaging elements of the first tightening sleeve 200 to remain intact and not deform during use of the torque wrench 100. Instead, deformation occurs away from the first element 40. In the illustrated embodiment, the first neck portion 252 is planar or flat in its normal state before deformation. However, the first neck portion 252 may be angled or curved downward or upward in its normal state before deformation. In the illustrated embodiment, the neck portion 252 is located at the top of the torque wrench 100. For example, the neck portion 252 may be aligned with the top portion 120 of the shaft 110. The neck portion 252 may also be aligned with the upper jaw 214. In alternative embodiments, the neck 252 may be incorporated into the wrench wall 218 , such as at a location between the upper jaw 214 and the lower jaw 216 .

[0125] The neck portion 252 of the first weakened section 250 has a reduced cross-sectional area compared to the shaft 110. For example, the height of the first weakened section 250 is reduced compared to the height of the shaft 110. Additionally or alternatively, the width of the first weakened section 250 may be reduced compared to the width of the shaft 110. The neck portion 252 is weakened compared to the shaft 110 to define a deformation region when the torque limit of the first tightening sleeve 200 is reached. For example, when a predetermined peak torque is reached during tightening, the first weakened section 250 begins to bend and deform, rather than transmitting the rotation of the shaft 110 to the first element 40. The torque wrench 100 is made of a ductile material, such as aluminum, to allow for plastic deformation when the predetermined torque limit is reached. The first weakened section 250 may be composed of a material that is less rigid than the material of the shaft 110.

[0126] Figure 15 is a bottom perspective view of a portion of the torque wrench 100 illustrating the second tightening sleeve 300 according to an exemplary embodiment. Figure 16FIG1 is a top perspective view of a portion of the torque wrench 100 according to an exemplary embodiment, illustrating a second tightening sleeve 300. The second tightening sleeve 300 includes a second wrench recess 310 and a second weakened section 350 connecting the second wrench recess 310 to the second end 114 of the shaft 110. In various embodiments, the second tightening sleeve 300 can be identical to the first tightening sleeve 300, but positioned at the opposite end of the torque wrench 100. However, in alternative embodiments, the second tightening sleeve 300 can be different, such as for use with components of different sizes or for torqueing to different peak torques. For example, different components (e.g., different surgical attachments) can be configured to attach to a second component (e.g., a handpiece), which may require recesses of different sizes or shapes and / or may require different amounts of torque for proper installation.

[0127] In the exemplary embodiment, the second tightening sleeve 300 includes a second head portion 312 that forms a second wrench recess 310. The second head portion 312 includes an upper jaw 314, a lower jaw 316, and a wrench wall 318 between the upper and lower jaws 314, 316. The second wrench recess 310 is defined by the upper jaw 314, the lower jaw 316, and the wrench wall 318. In the exemplary embodiment, the second wrench recess 310 is open between the upper and lower jaws 314, 316, opposite the wrench wall 318, to receive the first element 40. For example, the first element 40 can be side-loaded into the second wrench recess 310 between the upper and lower jaws 314, 316. In the illustrated embodiment, the lower jaw 316 extends parallel to the upper jaw 314. In the illustrated embodiment, the wrench wall 318 extends perpendicular to the upper jaw 314 and / or the lower jaw 316. In alternative embodiments, the second head 312 may have other shapes.

[0128] In various embodiments, the upper jaw 314 is longer than the lower jaw 316 (the lower jaw 316 is shorter than the upper jaw 314), which provides a feature that ensures that the second tightening sleeve 300 only tightens the first component 40 in a single direction. For example, if the torque wrench 100 is rotated in the wrong direction (e.g., in a loosening direction), the short lower jaw 316 causes the second tightening sleeve 300 to immediately separate from the first component 40, rather than rotating the first component 40 in the loosening direction.

[0129] In the exemplary embodiment, the wrench wall 318 meets the upper jaw 314 at an upper corner 320, and the wrench wall 318 meets the lower jaw 316 at a lower corner 322. Corners 320, 322 may be substantially 90° corners. Alternatively, corners 320, 322 may be curved. In the exemplary embodiment, the upper jaw 314, the lower jaw 316, and the wrench wall 318, respectively, include abutment surfaces 324, 326, 328 on their inner surfaces forming a receiving recess 330 for receiving the first element 40. In the exemplary embodiment, the abutment surfaces 324, 326, 328 include flat surfaces that are configured to abut against the first element 40 to rotate the first element 40 in a tightening direction.

[0130] In an exemplary embodiment, the second weakened section 350 is incorporated into the upper jaw 314. For example, the upper jaw 314 is coplanar with the second weakened section 350. The upper jaw 314 can be generally aligned with the top 120 of the shaft 110. For example, the upper jaw 314 can be coplanar with the top 120 of the shaft 110. In alternative embodiments, the upper jaw 314 can be located above the top 120 of the shaft 110. For example, the second weakened section 350 can be incorporated into the wrench wall 318 or the lower jaw plate 316. In other various embodiments, the upper jaw 314 can be angled laterally relative to the top 120 of the shaft 110. For example, the second head 312 can be angled downward, with the upper jaw 314 and / or the second weakened section 350 oriented at a downward angle relative to the top 120 of the shaft 110. Alternatively, the second head 312 may be angled upward, with the upper jaw 314 and / or the second weakened section 350 oriented at an upward angle relative to the top 120 of the shaft 110 .

[0131] In an exemplary embodiment, the second tightening sleeve 300 includes one or more keying features 332 for keyed engagement with the first element 40. This keyed engagement with the first element 40 ensures that the second tightening sleeve 300 can only engage with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to tighten the first element 40. In an exemplary embodiment, the keying features 332 include an upper keying feature 334 on the upper jaw 314 and a lower keying feature 336 on the lower jaw 316. In alternative embodiments, either the upper keying feature 334 or the lower keying feature 336 may be omitted. In alternative embodiments, the keying features 332 may be provided in other locations. In an exemplary embodiment, the upper keying feature 334 includes a platform 335 that is stepped inwardly relative to the engagement surface 324 of the upper jaw 314. The platform 335 may have a flat surface configured to engage the first element 40 to rotate the first element 40 during tightening. In the illustrated embodiment, the platform 335 is positioned toward the rear of the second tightening sleeve 300. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the upper jaw 314. In the illustrated embodiment, the width of the platform 335 is approximately half the width of the upper jaw 314. However, in alternative embodiments, the platform 335 may be wider or narrower. In the exemplary embodiment, the lower keying feature 336 includes a platform 337 that is stepped inward relative to the abutment surface 326 of the lower jaw 316. The platform 337 may have a flat surface configured to abut against the first element 40 to rotate the first element 40 during tightening. In the illustrated embodiment, the platform 337 is positioned toward the rear of the second tightening sleeve 300. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the lower jaw 316. In the illustrated embodiment, the width of the platform 337 is approximately half the width of the lower jaw 316. However, in alternative embodiments, the platform 337 may be wider or narrower. In an exemplary embodiment, keying features 334, 336 are arranged (e.g., both at the rear) to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (e.g., upside down). Keying feature 332 may be an optional element. For example, in an alternative embodiment, the torque wrench 100 may not be provided with keying feature 232.

[0132] The second weakened section 350 extends between the second wrench recess 310 and the second end 114 of the shaft 110. The second weakened section 350 includes a second neck portion 352 located between the shaft 110 and the second head portion 312. The second neck portion 352 is spaced apart from the receiving recess 330 of the second wrench recess 310, allowing the second weakened section 350 to be spaced apart from the first element 40. This allows the engaging elements of the second tightening sleeve 300 to remain intact and not deform during use of the torque wrench 100. Instead, deformation occurs away from the first element 40. In the illustrated embodiment, the second neck portion 352 is planar or flat in its normal state before deformation. However, the second neck portion 352 may be angled or curved downward or upward in its normal state before deformation. In the illustrated embodiment, the neck portion 352 is located at the top of the torque wrench 100. For example, the neck portion 352 may be aligned with the top 120 of the shaft 110. The neck portion 352 may also be aligned with the upper jaw 314. In alternative embodiments, the neck 352 may be incorporated into the wrench wall 318 , such as at a location between the upper jaw 314 and the lower jaw 316 .

[0133] The neck portion 352 of the second weakened section 350 has a reduced cross-sectional area compared to the shaft 110. For example, the height of the second weakened section 350 may be reduced compared to the height of the shaft 110. Additionally or alternatively, the width of the second weakened section 350 may be reduced compared to the width of the shaft 110. The reduced cross-sectional area of ​​the second weakened section 350 may be the same as the reduced cross-sectional area of ​​the first weakened section 250, thereby causing both weakened sections 350 to fail at the same peak torque. However, if the cross-sectional areas of the weakened sections 250 and 350 differ, the weakened sections 250 and 350 may yield at different peak torques. The neck portion 352 is weakened compared to the shaft 110 to define a deformation zone when the torque limit of the second tightening sleeve 300 is reached. For example, when a predetermined peak torque is reached during tightening, the second weakened section 350 begins to bend and deform, rather than transmitting the rotation of the shaft 110 to the first element 40. The torque wrench 100 is made of a ductile material, such as aluminum, to allow plastic deformation when a predetermined torque limit is reached. The second weakened section 350 may be composed of a material that is less rigid than the material of the shaft 110 .

[0134] Figure 17 is a front perspective view of a portion of the torque wrench 100 from the left side, illustrating the loosening socket 400 , according to an exemplary embodiment. Figure 18 is a front perspective view of a portion of the torque wrench 100 from the right side, showing the loosening socket 400 , according to an exemplary embodiment. The loosening socket 400 includes a loosening wrench recess 410 at the bottom 122 of the shaft 110 .

[0135] In the exemplary embodiment, the loosening sleeve 400 includes a loosening head 412 that forms a loosening wrench recess 410. The loosening head 412 includes a first jaw 414, a second jaw 416, and a wrench wall 418 between the first jaw 414 and the second jaw 416. The loosening wrench recess 410 is defined by the first jaw 414, the second jaw 416, and the wrench wall 418. In the exemplary embodiment, the loosening wrench recess 410 is open between the first jaw 414 and the second jaw 416, relative to the wrench wall 418, to receive the first element 40. For example, the first element 40 can be loaded into the loosening wrench recess 410 through the bottom between the first jaw 414 and the second jaw 416. In the illustrated embodiment, the second jaw 416 extends parallel to the first jaw 414. In the illustrated embodiment, the wrench wall 418 extends perpendicular to the first jaw 414 and / or the second jaw 416. In alternative embodiments, the unscrewing head 412 may have other shapes.

[0136] In various embodiments, the first jaw 414 is longer than the second jaw 416 (and the second jaw 416 is shorter than the first jaw 414), which provides a feature that ensures that the loosening sleeve 400 can only loosen the first element 40 in a single direction. For example, if the torque wrench 100 is rotated in the wrong direction (e.g., the tightening direction), the short second jaw 416 causes the loosening sleeve 400 to immediately separate from the first element 40, rather than rotating the first element 40 in the tightening direction.

[0137] In the exemplary embodiment, the wrench wall 418 meets the first jaw 414 at a first corner 420, and the wrench wall 418 meets the second jaw 416 at a second corner 422. The corners 420 and 422 may be substantially 90° corners. Alternatively, the corners 420 and 422 may be curved. In the exemplary embodiment, the first jaw 414, the second jaw 416, and the wrench wall 418 each include abutment surfaces 424, 426, and 428 on their inner surfaces forming a receiving recess 430 for receiving the first element 40. In the exemplary embodiment, the abutment surfaces 424, 426, and 428 include flat surfaces configured to abut against the first element 40 to rotate the first element 40 in a loosening direction.

[0138] In an exemplary embodiment, the loosening sleeve 400 includes one or more keying features 432 for keyed engagement with the first element 40. The keyed engagement with the first element 40 ensures that the loosening sleeve 400 can only engage with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to tighten the first element 40. In an exemplary embodiment, the keying features 432 include a first keying feature 434 on the first jaw 414 and a second keying feature 436 on the second jaw 416. In alternative embodiments, the first keying feature 434 or the second keying feature 436 may be omitted. In alternative embodiments, the keying features 432 may be provided in other locations. In an exemplary embodiment, the first keying feature 434 includes a platform 435 that is stepped inwardly relative to the engagement surface 424 of the first jaw 414. The platform 435 may have a flat surface configured to engage the first element 40 to rotate the first element 40 during the tightening process. In the illustrated embodiment, the platform 435 is positioned toward the rear of the loosening sleeve 400. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the first jaw 414. In the illustrated embodiment, the width of the platform 435 is approximately half the width of the first jaw 414. However, in alternative embodiments, the platform 435 may be wider or narrower. In the exemplary embodiment, the second keying feature 436 includes a platform 437 that is stepped inward relative to the abutment surface 426 of the second jaw 416. The platform 437 may have a flat surface configured to abut against the first element 40 to rotate the first element 40 during tightening. In the illustrated embodiment, the platform 437 is positioned toward the rear of the loosening sleeve 400. In alternative embodiments, other locations are possible, such as at the front or approximately centered on the second jaw 416. In the illustrated embodiment, the width of the platform 437 is approximately half the width of the second jaw 416. However, in alternative embodiments, the platform 437 may be wider or narrower. In the exemplary embodiment, the keying features 434 , 436 are arranged (eg, both at the rear) to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (eg, upside down).

[0139] Figure 19 The torque wrench 100 is illustrated wherein a first tightening sleeve 200 is coupled to the first element 40 and is configured to be tightened by rotating the torque wrench 100 in a tightening direction. Figure 20 The torque wrench 100 is illustrated wherein the first tightening sleeve 200 is not properly aligned with the first element 40 and cannot be coupled to the first element 40 . Figure 20The torque wrench 100 is shown inverted 180° (eg, upside down) such that the first tightening sleeve 200 cannot receive the first element 40. For example, the keying feature 232 prevents the first tightening sleeve 200 from being coupled to the first element 40 in an incorrect orientation.

[0140] In the exemplary embodiment, the first element 40 includes a keying feature 56 at the torque wrench interface 50. When the torque wrench 100 is properly oriented relative to the first element 40, the mating surfaces 224, 226 of the upper and lower jaws 214, 216 align with the flat surface 54 at the torque wrench interface 50. The mating surfaces 224, 226 are configured to seat on the flat surface 54 and are used to drive the first element 40 in the tightening direction when the torque wrench 100 is rotated in the tightening direction. The keying features 234, 236 on the upper and lower jaws 214, 216 are configured to interface with the keying feature 56 of the first element 40. In the illustrated embodiment, the keying feature 56 includes notches 58 that are stepped inward to receive the lands 235, 237 that define the keying features 234, 236. In alternative embodiments, the lands and notches may be reversed (e.g., the lands on the first element 40 and the notches on the jaws of the tightening sleeve). In alternative embodiments, other types of keying features may be used, such as slots, grooves, protrusions, projections, etc. When the torque wrench 100 is improperly oriented ( Figure 20 ), the first wrench recess 210 cannot receive the first element 40. The keying features 234, 236 are offset or misaligned relative to the keying feature 56 to prevent the first element 40 from being loaded into the receiving recess 230.

[0141] Figure 21 The torque wrench 100 is illustrated in a failed (or yielded) state according to an exemplary embodiment. Figure 22 The torque wrench 100 is illustrated in a failed state according to an exemplary embodiment. Figure 23 The torque wrench 100 is illustrated in a failed state according to an exemplary embodiment. Figures 21 to 23 The first weakened section 250 is shown deformed. For example, the neck 252 is bent upward and is no longer flat. When the torque limit is reached, the first weakened section 250 deforms during the tightening process.

[0142] Figure 21 The first weakened section 250 is illustrated as being deflected approximately 15°. Figure 22 The first weakened section 250 is illustrated as being deflected by approximately 90°. Figure 23The first weakened section 250 is shown deflected approximately 120°. The amount of deformation depends on the amount of rotation of the torque wrench 100 in the tightening direction after the peak torque is reached. The amount of deformation can range between approximately 0° and 180° while maintaining a consistent torque of no greater than the expected peak torque through the deformation. However, the amount of deformation can depend on the starting orientation of the first tightening sleeve 200 relative to the shaft 110. The amount of deformation can be limited by the shaft 110. For example, the first tightening sleeve 200 can be deformed until the first tightening sleeve 200 bottoms out against the top 120 of the shaft 110. Optionally, the first tightening sleeve 200 can be used multiple times. For example, the first tightening sleeve 200 can be used during a first tightening operation and deformed to Figure 21 The state shown can then be used during the second tightening operation and deformed to Figure 22 The state shown can then be used during the third tightening operation and deformed to Figure 23 For example, the first weakened section 250 has a consistent peak torque regardless of the starting orientation. Figure 21 The status shown is Figure 22 Compared with the state shown in Figure 22 The status shown is Figure 23 Compared to the state shown in FIG, the first weakened section 250 is deformed from the normal state to the Figure 21 The torque wrench 100 has high accuracy and consistent deformation.

[0143] Figure 24 is a top view of a torque wrench 100 according to an exemplary embodiment. Figure 25 is a front view of a torque wrench 100 according to an exemplary embodiment. Figure 26 is a rear view of the torque wrench 100 according to an exemplary embodiment. Figure 27 is a bottom view of a torque wrench 100 according to an exemplary embodiment. Figures 24 to 27 The shaft 110 , the first tightening sleeve 200 , the second tightening sleeve 300 , and the loosening sleeve 400 are illustrated.

[0144] Figure 28 is a right side view of a torque wrench 100 according to an exemplary embodiment. Figure 28 A first tightening sleeve 200 is shown on the right side of the torque wrench 100 .

[0145] Figure 29 is a left side view of the torque wrench 100 according to an exemplary embodiment. Figure 29 A second tightening sleeve 300 is shown on the left side of the torque wrench 100 .

[0146] Figure 30 The first component 40 is shown ready to be loaded onto the second component 60 according to an exemplary embodiment. Figure 31 A torque wrench 100 is illustrated according to an exemplary embodiment being used to tighten a first component 40 onto a second component 60 . Figure 32 A torque wrench 100 is illustrated according to an exemplary embodiment being used to unscrew a first component 40 from a second component 60 . Figure 33 The first element 40 is shown removed from the second element 60 according to an exemplary embodiment.

[0147] In the illustrated embodiment, the proximal end 44 of the first element 40 includes a threaded post that is configured to be threadedly received in a threaded hole at the distal end 66 of the second element 60. The proximal end 44 of the first element 40 includes a drive element 52 in the form of a hexagonal element having six flat surfaces 54 surrounding the exterior of the first element 40. A keying feature 56 of the first element 40 is defined by a channel or groove along the side of the drive element 52. The torque wrench 100 has features configured to interface with the drive element and the keying feature 56 to properly tighten and loosen the first element 40.

[0148] Figures 34 to 39 A torque wrench 100 is illustrated according to an exemplary embodiment. Figure 34 It is a top right front perspective view of the torque wrench 100 . Figure 35 It is a bottom right front perspective view of the torque wrench 100 . Figure 36 It is a right rear perspective view of the torque wrench 100 as viewed from above. Figure 37 It is a bottom right rear perspective view of the torque wrench 100 . Figure 38 It is a perspective view of the torque wrench 100 as seen from below and from behind. Figure 38 1 is a perspective view of the torque wrench 100 viewed from the bottom and the front. The torque wrench 100 includes a shaft 110, a first tightening sleeve 200, a second tightening sleeve 300 and a loosening sleeve 400.

[0149] The shaft 110 extends between a first end 112 on the right side and a second end 114 on the left side. The shaft 110 includes a front portion 116 and a rear portion 118. The shaft 110 includes a top portion 120 and a bottom portion 122. In the exemplary embodiment, the first tightening sleeve 200 is disposed at the first end 112, the second tightening sleeve 300 is disposed at the second end 114, and the loosening sleeve 400 is disposed at the bottom portion 122. In alternative embodiments, other locations are possible.

[0150] The first tightening sleeve 200 includes a first wrench recess 210 configured to receive the first element 40 to tighten the first element 40 when the torque wrench 100 is rotated in a tightening direction. The first tightening sleeve 200 is connected to the first end 112 of the shaft 110 via a first weakened section 250, which is configured to yield at a predetermined torque. The first weakened section 250 is located between the first wrench recess 210 and the first end 112 of the shaft 110.

[0151] The second tightening sleeve 300 includes a second wrench recess 310 configured to receive the first element 40 to tighten the first element 40 when the torque wrench 100 is rotated in a tightening direction. The second tightening sleeve 300 is connected to the second end 114 of the shaft 110 via a second weakened section 350, which is configured to yield at a predetermined torque. The second weakened section 350 is located between the second wrench recess 310 and the second end 114 of the shaft 110.

[0152] The loosening sleeve 400 is separated and detached from the first tightening sleeve 200 and the second tightening sleeve 300. For example, the loosening sleeve 400 is away from the first tightening sleeve 200 and the second tightening sleeve 300. The loosening sleeve 400 is configured to receive the first element 40 during the loosening operation. The loosening sleeve 400 includes a loosening wrench recess 410 that is configured to receive the first element 40 to loosen the first element 40 from the second element 60 when the torque wrench 100 is rotated in the loosening direction.

[0153] Figure 40 is a top perspective view of a portion of a torque wrench 100 illustrating a first tightening sleeve 200 according to an exemplary embodiment. Figure 41 is a bottom perspective view of a portion of the torque wrench 100 according to an exemplary embodiment, illustrating the first tightening sleeve 200. The first tightening sleeve 200 includes a first wrench recess 210 and a first weakened section 250 connecting the first wrench recess 210 to the first end 112 of the shaft 110.

[0154] The first tightening sleeve 200 includes a first head portion 212 that forms a first wrench recess 210. The first head portion 212 includes an upper jaw 214, a lower jaw 216, and a wrench wall 218 between the upper jaw 214 and the lower jaw 216. The wrench wall 218 meets the upper jaw 214 at an upper corner 220, and the wrench wall 218 meets the lower jaw 216 at a lower corner 222. The upper jaw 214, the lower jaw 216, and the wrench wall 218 each include abutment surfaces 224, 226, 228 on their inner surfaces that form a receiving recess 230 for receiving the first element 40. In an exemplary embodiment, the abutment surfaces 224, 226, 228 include flat surfaces that are configured to abut against the first element 40 to rotate the first element 40 in a tightening direction.

[0155] In an exemplary embodiment, the first tightening sleeve 200 includes a keying feature 238 located at a rear portion for keyed engagement with the first element 40. The keying feature 238 is in the form of a protrusion or projection that projects into the receiving recess 230. In an exemplary embodiment, the keying feature 238 comprises a semicircular opening or cutout configured to receive a portion of the first element 40, such as a cylindrical outer surface of the first element 40. The keying feature 238 may include rounded corners 220 and 222. The keying feature 238 may extend along the upper jaw 214 and / or the lower jaw 216 and / or the wrench wall 218. The keyed engagement with the first element 40 ensures that the first tightening sleeve 200 only engages with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to tighten the first element 40. In alternative embodiments, the keying feature 232 may be provided in other locations. In the exemplary embodiment, the keying feature 238 is arranged to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (eg, upside down).

[0156] The first weakened section 250 extends between the first wrench recess 210 and the first end 112 of the shaft 110. The first weakened section 250 includes a first neck portion 252 located between the shaft 110 and the first head portion 212. The first neck portion 252 is spaced apart from the receiving recess 230 of the first wrench recess 210, allowing the first weakened section 250 to be spaced apart from the first element 40. The neck portion 252 of the first weakened section 250 has a reduced cross-sectional area compared to the shaft 110. The neck portion 252 is weakened compared to the shaft 110 to define a deformation region when the torque limit of the first tightening sleeve 200 is reached. For example, when a predetermined peak torque is reached during tightening, the first weakened section 250 begins to bend and deform, rather than transmitting the rotation of the shaft 110 to the first element 40. The torque wrench 100 is made of a ductile material, such as aluminum, to allow for plastic deformation when the predetermined torque limit is reached. The first weakened section 250 may be composed of a material that is less rigid than the material of the shaft 110 .

[0157] Figure 42 is a bottom perspective view of a portion of the torque wrench 100 illustrating the second tightening sleeve 300 according to an exemplary embodiment. Figure 43 is a top perspective view of a portion of the torque wrench 100 according to an exemplary embodiment, illustrating the second tightening sleeve 300. The second tightening sleeve 300 includes a second wrench recess 310 and a second weakened section 350 connecting the second wrench recess 310 to the second end 114 of the shaft 110.

[0158] The second tightening sleeve 300 includes a second head portion 312 that forms a second wrench recess 310. The second head portion 312 includes an upper jaw 314, a lower jaw 316, and a wrench wall 318 between the upper jaw 314 and the lower jaw 316. The wrench wall 318 meets the upper jaw 314 at an upper corner 320, and the wrench wall 318 meets the lower jaw 316 at a lower corner 322. The upper jaw 314, the lower jaw 316, and the wrench wall 318 each include abutment surfaces 324, 326, and 328 on their inner surfaces that form a receiving recess 330 for receiving the first element 40. In an exemplary embodiment, the abutment surfaces 324, 326, and 328 include flat surfaces that are configured to abut against the first element 40 to rotate the first element 40 in a tightening direction.

[0159] In an exemplary embodiment, the second tightening sleeve 300 includes a keying feature 338 located at a rear portion for keyed engagement with the first element 40. The keying feature 338 is in the form of a protrusion or projection that projects into the receiving recess 330. In an exemplary embodiment, the keying feature 338 comprises a semicircular opening or cutout configured to receive a portion of the first element 40, such as a cylindrical outer surface of the first element 40. The keying feature 338 may include rounded corners 320, 322. The keying feature 338 may extend along the upper jaw 314 and / or the lower jaw 316 and / or the wrench wall 318. The keyed engagement with the first element 40 ensures that the second tightening sleeve 300 only engages with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to tighten the first element 40. In alternative embodiments, the keying feature 338 may be provided in other locations. In the exemplary embodiment, the keying feature 338 is arranged to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (eg, upside down).

[0160] The second weakened section 350 extends between the second wrench recess 310 and the second end 114 of the shaft 110. The second weakened section 350 includes a second neck portion 352 located between the shaft 110 and the second head portion 312. The second neck portion 352 is spaced apart from the receiving recess 330 of the second wrench recess 310, allowing the second weakened section 350 to be spaced apart from the first element 40. The neck portion 352 of the second weakened section 350 has a reduced cross-sectional area compared to the shaft 110. The neck portion 352 is weakened compared to the shaft 110 to define a deformation region when the torque limit of the second tightening sleeve 300 is reached. For example, when a predetermined peak torque is reached during tightening, the second weakened section 350 begins to bend and deform, rather than transmitting the rotation of the shaft 110 to the first element 40. The torque wrench 100 is made of a ductile material, such as aluminum, to allow for plastic deformation when the predetermined torque limit is reached. The second weakened section 350 may be composed of a material that is less rigid than the material of the shaft 110 .

[0161] Figure 44 is a front perspective view of a portion of the torque wrench 100 from the right side, illustrating the loosening socket 400 , according to an exemplary embodiment. Figure 45 is a front perspective view of a portion of the torque wrench 100 from the left side, illustrating the loosening socket 400 , according to an exemplary embodiment. Figure 46 is a front perspective view of a portion of a torque wrench 100 showing a loosening socket 400 according to an exemplary embodiment. Figure 47 is a rear perspective view of a portion of the torque wrench 100 according to an exemplary embodiment, illustrating the loosening socket 400. The loosening socket 400 includes a loosening wrench recess 410 at the bottom 122 of the shaft 110.

[0162] In the exemplary embodiment, the loosening sleeve 400 includes a loosening head 412 that forms a loosening wrench recess 410. The loosening head 412 includes a first jaw 414, a second jaw 416, and a wrench wall 418 between the first jaw 414 and the second jaw 416. The loosening wrench recess 410 is defined by the first jaw 414, the second jaw 416, and the wrench wall 418. In the exemplary embodiment, the wrench wall 418 meets the first jaw 414 at a first corner 420, and the wrench wall 418 meets the second jaw 416 at a second corner 422. The first jaw 414, the second jaw 416, and the wrench wall 418 respectively include abutment surfaces 424, 426, 428 on the inner surface of the receiving recess 430 for receiving the first component 40. In the exemplary embodiment, the engagement surfaces 424 , 426 , 428 include flat surfaces configured to engage the first element 40 to rotate the first element 40 in a loosening direction.

[0163] In an exemplary embodiment, the loosening sleeve 400 includes a keying feature 438 located at a rear portion for keyed engagement with the first element 40. The keying feature 438 is in the form of a protrusion or projection that projects into the receiving recess 430. In an exemplary embodiment, the keying feature 438 comprises a semicircular opening or cutout configured to receive a portion of the first element 40, such as a cylindrical outer surface of the first element 40. The keying feature 438 may include rounded corners 420, 422. The keying feature 438 may extend along the first jaw 414 and / or the second jaw 416 and / or the wrench wall 418. The keyed engagement with the first element 40 ensures that the loosening sleeve 400 only engages with the first element 40 in one orientation, ensuring that the first element 40 rotates in the correct direction when the torque wrench 100 is used to loosen the first element 40. In alternative embodiments, the keying feature 438 may be provided in other locations. In the exemplary embodiment, the keying feature 438 is arranged to prevent the torque wrench 100 from being coupled to the first element 40 in an incorrect orientation (eg, upside down).

[0164] Figure 48 The torque wrench 100 is illustrated wherein a first tightening sleeve 200 is coupled to the first element 40 and is configured to be tightened by rotating the torque wrench 100 in a tightening direction. Figure 49 The torque wrench 100 is illustrated wherein the first tightening sleeve 200 is not properly aligned with the first element 40 and cannot be coupled to the first element 40 . Figure 49 The torque wrench 100 is shown inverted 180° (eg, upside down) such that the first tightening sleeve 200 cannot receive the first element 40. For example, the keying feature 238 prevents the first tightening sleeve 200 from being coupled to the first element 40 in an incorrect orientation.

[0165] In an exemplary embodiment, the first element 40 includes a keying feature 57 at the torque wrench interface 50. When the torque wrench 100 is properly oriented relative to the first element 40, the mating surfaces 224, 226 of the upper jaw 214 and the lower jaw 216 are aligned with the flat surface 54 at the torque wrench interface 50. The mating surfaces 224, 226 are configured to sit on the flat surface 54 and are used to drive the first element 40 in the tightening direction when the torque wrench 100 is rotated in the tightening direction. The keying feature 238 is configured to interface with the keying feature 57 of the first element 40. For example, the wall defining the keying feature 238 is received in a groove or channel at the end of the torque wrench interface 50 that defines the keying feature 57. In alternative embodiments, other types of keying features may be used. When the torque wrench 100 is improperly oriented ( Figure 49 ), the first wrench recess 210 cannot receive the first component 40. The keying feature 238 bottoms out on the flat surface 54, thereby preventing the first component 40 from being loaded into the receiving recess 230.

[0166] Figure 50 The torque wrench 100 is illustrated in a failed (or yielded) state according to an exemplary embodiment. Figure 51 The torque wrench 100 is illustrated in a failed state according to an exemplary embodiment. Figure 52 The torque wrench 100 is illustrated in a failed state according to an exemplary embodiment. Figures 50 to 52 The first weakened section 250 is shown deformed. For example, the neck 252 is bent upward and is no longer flat. When the torque limit is reached, the first weakened section 250 deforms during the tightening process.

[0167] Figure 50 The first weakened section 250 is illustrated as being deflected approximately 15°. Figure 51 The first weakened section 250 is illustrated as being deflected by approximately 90°. Figure 52 The first weakened section 250 is shown deflected approximately 120°. The amount of deformation depends on the amount of rotation of the torque wrench 100 in the tightening direction after the peak torque is reached. The amount of deformation can range between approximately 0° and 180°. However, the amount of deformation can depend on the starting orientation of the first tightening sleeve 200 relative to the shaft 110. The amount of deformation can be limited by the shaft 110. For example, the first tightening sleeve 200 can be deformed until the first tightening sleeve 200 bottoms out against the top 120 of the shaft 110. Optionally, the first tightening sleeve 200 can be used multiple times. For example, the first tightening sleeve 200 can be used during a first tightening operation and deformed to Figure 50 The state shown can then be used during the second tightening operation and deformed to Figure 51 The state shown can then be used during the third tightening operation and deformed to Figure 52 For example, the first weakened section 250 has a consistent peak torque regardless of the starting orientation.

[0168] Figure 53 is a top view of a torque wrench 100 according to an exemplary embodiment. Figure 54 is a front view of a torque wrench 100 according to an exemplary embodiment. Figure 55 is a rear view of the torque wrench 100 according to an exemplary embodiment. Figure 56 is a bottom view of a torque wrench 100 according to an exemplary embodiment. Figures 53 to 56 The shaft 110 , the first tightening sleeve 200 , the second tightening sleeve 300 , and the loosening sleeve 400 are illustrated.

[0169] Figure 57 is a right side view of a torque wrench 100 according to an exemplary embodiment. Figure 57 A first tightening sleeve 200 is shown on the right side of the torque wrench 100 .

[0170] Figure 58 is a left side view of the torque wrench 100 according to an exemplary embodiment. Figure 58 A second tightening sleeve 300 is shown on the left side of the torque wrench 100 .

[0171] Figure 59 is a perspective view of a surgical device kit 500 according to an exemplary embodiment. Figure 60 FIG is a top view of a surgical device kit 500 according to an exemplary embodiment. The surgical device kit 500 includes a package 502 containing a torque wrench 100. The torque wrench 100 may be housed in a container 504 ( Figure 59 ). The surgical device kit 500 includes a first element, such as a surgical attachment 42 in a package 502. The surgical attachment 42 may be housed within a container 506 ( Figure 59 ). Other components may be packaged in a package 502 along with the torque wrench 100 and the surgical attachment 42, such as a cannula 510 configured to be coupled to a handpiece to cover the surgical attachment 42, and a stylet 520. Other components may be arranged in the package 502. These components may be disposable. These components may be sterilizable.

[0172] It should be understood that the foregoing description is intended to be illustrative and not restrictive. For example, the above-described embodiments (and / or aspects thereof) may be used in combination with each other. Additionally, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from the scope of the present invention. The dimensions, material types, orientations of the various components, and the number and positions of the various components described herein are intended to define parameters of certain embodiments and are by no means limiting and are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of the present invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms "including" and "in which" are used as the plain-English equivalents of the respective terms "comprising" and "wherein." Moreover, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels and are not intended to impose numerical requirements on their objects. Further, the appended claim limitations are not written in means-plus-function format and are not intended to be interpreted under 35 USC § 112(f) unless and until such claim limitations expressly use the phrase "means for..." and are not followed by a further structural recitation of functionality.

[0173] Independently claimable aspects of the invention are presented below as a series of clauses, which may be represented by respective claims.

[0174] Clause 1. A torque wrench for connecting a first component to a second component, the torque wrench comprising:

[0175] a shaft extending between a first end and a second end;

[0176] a first tightening sleeve at the first end, the first tightening sleeve including a first wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the first tightening sleeve connected to the first end of the shaft by a first weakened section, the first weakened section configured to yield at a predetermined peak torque; and

[0177] A loosening sleeve is separate from the first tightening sleeve, the loosening sleeve including a loosening wrench recess configured to receive the first element to loosen the first element from the second element when the torque wrench is rotated in a loosening direction.

[0178] Clause 2. The torque wrench of Clause 1, wherein the first weakened section is spaced apart from the first element.

[0179] Clause 3. A torque wrench for connecting a first component to a second component, the torque wrench comprising:

[0180] a shaft extending between a first end and a second end;

[0181] a first tightening sleeve including a first wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the first tightening sleeve being connected to the first end of the shaft via a first weakened section, the first weakened section being configured to yield at a predetermined peak torque; and

[0182] a second tightening sleeve including a second wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the second tightening sleeve being connected to the second end of the shaft through a second weakened section, the second weakened section being configured to yield at the predetermined peak torque.

[0183] Clause 4. The torque wrench of Clause 3, wherein the first tightening sleeve and the second tightening sleeve are identical and face in opposite directions on opposite first and second ends of the shaft.

[0184] Clause 5. The torque wrench of Clause 3 or 4, wherein the torque wrench is a dual-use disposable torque wrench, wherein the first tightening sleeve is a disposable torque sleeve that cannot be used after the first weakened section yields, and the second tightening sleeve is a disposable torque sleeve that cannot be used after the second weakened section yields.

[0185] Clause 6. The torque wrench according to any one of Clauses 3 to 5, wherein the first tightening sleeve and the second tightening sleeve are used for different tightening operations to tighten the first component onto the second component at different times.

[0186] Clause 7. A torque wrench as described in any of clauses 3 to 6, wherein the first weakened section includes a first neck having a reduced cross-sectional area compared to the shaft, and / or the second weakened section includes a second neck having a reduced cross-sectional area compared to the shaft, wherein preferably, the reduced cross-sectional area of ​​the second neck is equal to the reduced cross-sectional area of ​​the first neck.

[0187] Clause 8. A torque wrench as described in any one of clauses 3 to 7, wherein the first tightening sleeve includes an upper jaw and a lower jaw located on opposite sides of the first wrench recess, the upper jaw and the lower jaw of the first tightening sleeve having flat abutment surfaces, which are configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is tightened, and / or wherein the second tightening sleeve includes an upper jaw and a lower jaw located on opposite sides of the second wrench recess, the upper jaw and the lower jaw of the second tightening sleeve having flat abutment surfaces, which are configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is tightened.

[0188] Clause 9. The torque wrench of any one of clauses 3 to 8, wherein the first tightening sleeve includes a first keying feature configured to interface with the first element in only one orientation, and / or wherein the second tightening sleeve includes a second keying feature configured to interface with the first element in only one orientation.

[0189] Clause 10. The torque wrench of any one of clauses 3 to 9, further comprising a loosening sleeve along the shaft, the loosening sleeve comprising a loosening wrench recess configured to receive the first element to loosen the first element from the second element when the torque wrench is rotated in a loosening direction.

[0190] Clause 11. A method of attaching a first component to a second component, the method comprising:

[0191] A torque wrench is provided, the torque wrench comprising a shaft extending between a first end and a second end, a first tightening sleeve at the first end, and a loosening sleeve separate from the first tightening sleeve, the first tightening sleeve comprising a first wrench recess configured to receive the first element, the first tightening sleeve being connected to the first end of the shaft via a first weakened section, the first weakened section being configured to yield at a predetermined peak torque, the loosening sleeve comprising a loosening wrench recess configured to receive the first element;

[0192] coupling the first tightening sleeve to the first element;

[0193] rotating the torque wrench in a tightening direction using the first tightening sleeve to tighten the first component to the second component, wherein the first weakened section of the torque wrench yields when the first component is tightened to the predetermined peak torque;

[0194] coupling the unscrewing sleeve to the first element; and

[0195] The torque wrench is rotated in a loosening direction to loosen the first component from the second component using the loosening sleeve.

[0196] Clause 12. The method of Clause 11, wherein coupling the first tightening sleeve to the first component comprises aligning a first keyed interface of the first tightening sleeve with a keyed interface of the first component.

[0197] Clause 13. A method as described in clause 10 or 11, wherein the first tightening sleeve includes upper and lower jaws on opposite sides of the first wrench recess, the upper and lower jaws of the first tightening sleeve having flat mating surfaces, and coupling the first tightening sleeve to the first element includes engaging these flat mating surfaces of the upper and lower jaws with the flat mating surfaces of the first element to rotate the first element when tightening the torque wrench.

[0198] Clause 14. The method of any one of clauses 11 to 13, wherein providing the torque wrench comprises providing the torque wrench, the torque wrench comprising a second tightening sleeve at the second end of the shaft, the second tightening sleeve comprising a second wrench recess configured to receive the first element to tighten the first element onto the second element, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at the predetermined peak torque, wherein the second tightening sleeve allows a second tightening operation to be performed by the torque wrench before disposing of the torque wrench.

[0199] Clause 15. The method of clause 14, further comprising:

[0200] coupling the second tightening sleeve to the first element; and

[0201] The torque wrench is rotated in a tightening direction using the second tightening sleeve to tighten the first component to the second component, wherein the second weakened section of the torque wrench yields when the first component is tightened to the predetermined peak torque.

Claims

1. A torque wrench for connecting a first component to a second component, the torque wrench comprising: a shaft extending between a first end and a second end; a first tightening sleeve at the first end, the first tightening sleeve including a first wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the first tightening sleeve connected to the first end of the shaft by a first weakened section, the first weakened section configured to yield at a predetermined peak torque; as well as A loosening sleeve is separate from the first tightening sleeve, the loosening sleeve including a loosening wrench recess configured to receive the first element to loosen the first element from the second element when the torque wrench is rotated in a loosening direction.

2. The torque wrench of claim 1 , further comprising a second tightening sleeve at the second end, the second tightening sleeve comprising a second wrench recess, the second wrench recess configured to receive the first element to tighten the first element to the second element when the torque wrench is rotated in a tightening direction, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at the predetermined peak torque.

3. The torque wrench according to claim 2, wherein: The first tightening sleeve and the second tightening sleeve are identical and face in opposite directions on opposite first and second ends of the shaft.

4. The torque wrench according to any one of claims 1 to 3, wherein: The torque wrench is a disposable torque wrench, wherein the first tightening sleeve and / or the second tightening sleeve are disposable torque sleeves that cannot be used after the first weakened section and / or the second weakened section yield.

5. The torque wrench according to any one of claims 1 to 4, wherein: The first weakened section deforms at the predetermined peak torque and / or deforms by bending rearwardly toward the axial direction.

6. The torque wrench according to claim 5, wherein: The first weakened section is configured to have a deformation range between about 0° and about 180°, and the applied torque is stabilized at the predetermined peak torque within the deformation range.

7. The torque wrench according to any one of claims 1 to 6, wherein: The first weakened section comprises a first neck having a reduced cross-sectional area compared to the shaft and / or the first weakened section extends between the first end of the shaft and the first tightening sleeve.

8. The torque wrench according to any one of claims 1 to 7, wherein: The first tightening sleeve includes upper and lower jaws located on opposite sides of the first wrench recess, the upper and lower jaws of the first tightening sleeve having flat abutment surfaces that are configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is tightened.

9. The torque wrench according to claim 8, wherein: The lower jaw is shorter than the upper jaw, thereby allowing the first element to rotate only in the tightening direction.

10. The torque wrench according to any one of claims 1 to 9, wherein: The first tightening sleeve and / or the second tightening sleeve include a first keying feature and / or a second keying feature configured to interface with the first component in only one orientation.

11. The torque wrench according to any one of claims 1 to 10, wherein: The loosening sleeve includes a first jaw and a second jaw on opposite sides of the loosening wrench recess, the first jaw and the second jaw having flat abutment surfaces that are configured to engage the flat abutment surface of the first element to rotate the first element when the torque wrench is loosened.

12. The torque wrench according to any one of claims 1 to 11, wherein: The first tightening sleeve and / or the second tightening sleeve faces a first direction, and the loosening sleeve faces a second direction perpendicular to the first direction.

13. The torque wrench according to any one of claims 1 to 12, wherein: The first tightening sleeve and / or the second tightening sleeve and the loosening sleeve are integral with the shaft to define a one-piece torque wrench.

14. The torque wrench according to any one of claims 1 to 13, wherein: The shaft is made of a sterilizable, biocompatible and / or disposable metal material.

15. A surgical device kit comprising: a surgical attachment extending between a proximal end configured to be removably coupled to a handpiece and a distal end having a working element for performing a procedure, the surgical attachment including a torque wrench interface; as well as a torque wrench configured to interface with the surgical attachment at the torque wrench interface to tighten the surgical attachment to the handpiece to a predetermined peak torque and to loosen the surgical attachment from the handpiece, the torque wrench comprising: a shaft extending between a first end and a second end and a first tightening sleeve at the first end, the first tightening sleeve comprising a first wrench recess, the first wrench recess configured to receive the surgical attachment at the torque wrench interface to tighten the surgical attachment to the handpiece when the torque wrench is rotated in a tightening direction, the first tightening sleeve connected to the first end of the shaft by a first weakened section, the first weakened section configured to yield at the predetermined peak torque; and a loosening sleeve separate from the first tightening sleeve, the loosening sleeve comprising a loosening wrench recess configured to receive the surgical attachment at the torque wrench interface to loosen the surgical attachment from the handpiece when the torque wrench is rotated in a loosening direction.

16. The surgical device kit of claim 15 , wherein the torque wrench further comprises a second tightening sleeve at the second end, the second tightening sleeve comprising a second wrench recess, the second wrench recess being configured to receive the first element to tighten the first element, the second tightening sleeve being connected to the second end of the shaft via a second weakened section, the second weakened section being configured to yield at a predetermined peak torque.

17. The surgical device kit of claim 15 or 16, further comprising a sleeve configured to surround the surgical attachment, the sleeve configured to couple to the handpiece.

18. The surgical device kit according to any one of claims 15 to 17, wherein: The first tightening sleeve and / or the second tightening sleeve include a keying feature configured to interface with a surgical instrument at the torque wrench interface in only one orientation.

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