Rack for advancing surgical handle assembly

Abstract

The invention relates to a rack for advancing a surgical handle assembly. An example apparatus includes a rack; a movable handle member; a drive jaw configured to engage the rack and advance the rack in a linear distal direction in response to a movable handle member advancing in a proximal direction; and a latch configured to engage the rack and advance the rack in a linear proximal direction in response to advancement of the movable handle member in a distal direction.

Description

[0001] Information about divisional applications

[0002] This case is a divisional application. The parent case of the divisional application is an invention patent application with application date of January 15, 2020, application number 202080009594.6, and invention name “Rack for advancing surgical handle assembly”. Technical Field

[0003] The present disclosure relates generally to surgical handle assemblies, and more particularly to a rack that advances a surgical handle assembly. Background Art

[0004] The surgical handle assembly can be used in several surgical devices. One example includes use as a surgical stapler. A surgical stapler is a fastening device for clamping tissue between relative jaw structures to engage tissue using surgical fasteners. The surgical stapler may include two elongated members for clamping tissue. One of the elongated members may include one or more reloadable cartridges, and the other elongated member may include an anvil that can be used to form nails when driven from the reloadable cartridge. The surgical stapler can receive one or more reloadable cartridges. An example of a reloadable cartridge may include several rows of nails with a linear length. A row of nails may have a linear length of, for example, between 30 mm and 60 mm. The nail can be ejected by actuation of a movable handle member that is part of the surgical handle assembly of the surgical stapler. Summary of the invention

[0005] In one aspect, the present application provides a surgical handle assembly device comprising: a rack; a movable handle member; a drive claw configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction; and a latch configured to engage the rack and advance the rack in a linear proximal direction in response to the movable handle member being advanced in a distal direction.

[0006] In another aspect, the present application provides a surgical handle assembly apparatus comprising: a rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; and a disengagement mechanism configured to disengage the drive pawl from the rack.

[0007] In another aspect, the present application provides a surgical handle assembly device comprising: a rack; a movable handle member; and a drive pawl, wherein the drive pawl is disengaged from the rack when the surgical handle assembly device is in a ready-to-fire position, wherein the drive pawl is configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction, thereby placing the surgical handle assembly device in a firing mode from the ready-to-fire position.

[0008] In another aspect, the present application provides a surgical handle assembly device comprising: a rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; a disengagement mechanism configured to disengage the drive pawl from the rack to transform the surgical handle assembly device to a ready-to-fire position; and a movable handle member connected to the drive pawl, wherein the movable handle member is configured to move between a proximal position and a distal position, and wherein the surgical handle assembly device is in the ready-to-fire position in response to the drive pawl being disengaged from the rack and the movable handle member being in the distal position.

[0009] In another aspect, the present application provides a surgical handle assembly device, comprising: a rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction; and a disengagement mechanism configured to disengage the drive pawl from the rack to transform the surgical handle assembly device into a ready-to-fire position, wherein the drive pawl is configured to move in the proximal direction in response to the movable handle member moving in the distal direction to place the surgical handle assembly device in the ready-to-fire position, and wherein the drive pawl is configured to re-engage the rack and advance the rack in the linear distal direction in response to the movable handle member being advanced in the proximal position, thereby placing the surgical handle assembly device in a firing mode.

[0010] In another aspect, the present application provides a surgical handle assembly device comprising: a rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction; a latch configured to engage the rack and advance the rack in a linear proximal direction in response to the movable handle member being advanced in a distal direction; and a disengagement mechanism configured to contact the drive pawl to disengage the drive pawl and the latch from the rack.

[0011] In another aspect, the present application provides a surgical handle assembly device comprising: a rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; and a disengagement mechanism configured to move downward and contact the drive pawl to disengage the drive pawl from the rack.

[0012] In another aspect, the present application provides a surgical handle assembly device comprising: a rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction; a latch configured to engage the rack and advance the rack in a linear proximal direction in response to the movable handle member being advanced in a distal direction; and a button configured to activate a disengagement mechanism, which moves downward to contact the drive pawl and disengages the drive pawl and the latch from the rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1A is a schematic diagram of a surgical stapling apparatus including a surgical handle assembly and a reloadable cartridge assembly in a released position according to several embodiments of the present disclosure.

[0014] Figure 1B is a schematic diagram of a surgical stapling apparatus including a surgical handle assembly and a reloadable cartridge assembly in a clamped position according to several embodiments of the present disclosure.

[0015] Figure 2A is a schematic diagram of a surgical handle assembly in a released position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0016] Figure 2B is a schematic diagram of a surgical handle assembly in a clamped position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0017] Figure 2C is a schematic diagram of a surgical handle assembly in a clamped position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0018] Figure 2D is a schematic diagram of a surgical handle assembly in a released position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0019] Figure 2E is a schematic diagram of a surgical handle assembly in a released position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0020] Figure 2F is a schematic diagram of a surgical handle assembly in a released position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0021] Figure 2G is a schematic diagram of a surgical handle assembly in a released position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0022] Figure 2H is a schematic diagram of a surgical handle assembly in a clamped position according to several embodiments of the present disclosure, including a movable handle member, a button, a rack, a drive pawl, a latch, a disengagement mechanism, and a safety latch.

[0023] Figure 3 is a schematic diagram of a security latch, button, and disengagement mechanism according to several embodiments of the present disclosure. DETAILED DESCRIPTION

[0024] The present disclosure includes an apparatus for a surgical handle assembly. An example apparatus includes: a rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to the movable handle member being advanced in a proximal direction; and a latch configured to engage the rack and advance the rack in a linear proximal direction in response to the movable handle member being advanced in a distal direction.

[0025] A surgical handle assembly using a surgical stapler coupled to a reloadable cartridge can advance the reloadable cartridge to a clamped position in response to a drive pawl advancing a rack in a linear distal direction, and the reloadable cartridge can be advanced to a released position in response to a latch advancing the rack in a linear proximal direction.

[0026] For example, a user may move the movable handle member from a distal-most position to a proximal-most position. This movement may cause the drive pawl to engage the rack, driving the rack at the distal end to cause the elongated member of the reloadable cartridge assembly to clamp and may cause the latch to enter a slot in the rack. As the rack moves at the distal end, the safety latch may move downward and upward in response to the movement of the rack, and the latch may move to engage the rack so that the rack cannot move with the movable handle member at the distal end or cannot be manually moved by the user using the retraction handle. At this stage, the user may press a button so that the nail may be delivered or release the movable handle member to cause the elongated member of the reloadable cartridge assembly to release.

[0027] If the user does not press the button, but releases the movable handle member, the movable handle member may move in the distal direction and stop at a position between the distal-most position and the proximal-most position. In response to the movable handle member moving in the distal direction, the latch may engage the rack and may drive the rack in a linear proximal direction to cause the elongated member of the reloadable cartridge assembly to release.

[0028] In some examples, the user may move the movable handle member from a position between the distal-most position and the proximal-most position to the proximal-most position. The elongated member of the reloadable cartridge assembly may be clamped in response to the user moving the movable handle member from a position between the distal-most position and the proximal-most position to the proximal-most position. Alternatively, the user may move the movable handle member from a position between the distal-most position and the proximal-most position to the distal-most position, and then, after moving the movable handle member in the proximal direction, clamp the elongated member of the reloadable cartridge assembly.

[0029] In several embodiments, a surgical handle assembly having a surgical stapler coupled to a reloadable cartridge can deploy a plurality of staples. The reloadable cartridge can deploy a plurality of staples in response to a user pressing a button and moving the movable handle member in a proximal direction. In some instances, when the button is pressed by the user, the movable handle member can be in a position between the proximal position or the distal position.

[0030] The button may include a first inclined surface. When the button is pressed and the button is in the pressed position, the first inclined surface of the button may cause the safety latch to move in a downward direction. Once the safety latch is in the lowered position, the safety latch may no longer engage the rack to prevent the rack from moving further in the linear distal direction so that the nail can be delivered.

[0031] The button may also include a second inclined surface. When the button is pressed and the button is in the pressed position, the second inclined surface of the button may contact the disengagement mechanism and cause the disengagement mechanism to move in a downward direction. As the disengagement mechanism moves downward, it may contact the drive pawl and move the drive pawl and the latch in a downward direction to prevent the drive pawl and the latch from engaging the rack.

[0032] In several embodiments, the movable handle member may be coupled to a spring. The spring may bias the movable handle member to a proximal-most position. In response to the disengagement mechanism preventing the latch from engaging the rack, the spring may bias the movable handle member to a distal-most position without advancing the rack in a linear proximal direction. Without advancing the rack in a linear proximal direction, the reloadable cartridge may remain in a clamped position.

[0033] The user can advance the movable handle member from the most distal position to the most proximal position. The drive pawl can re-engage the rack and advance the rack in the linear distal direction in response to the movable handle member being advanced in the proximal direction. The safety latch in the lowered position can no longer engage the rack to prevent the rack from moving further in the linear distal direction so that the nail can be delivered.

[0034] When the user has finished delivering the nails, the user can manually move the rack in the linear proximal direction. In some examples, the user can manually move the rack in the linear proximal direction by engaging the retraction handles on both sides of the surgical handle assembly and pulling the retraction handles in the linear proximal direction to cause the rack, button, safety latch, disengagement mechanism, drive pawl and latch to return to the starting position.

[0035] In the following detailed description of the present disclosure, reference is made to the accompanying drawings which form a part hereof and in which are shown, by way of illustration, how one or more embodiments of the present disclosure may be practiced. These embodiments are described in sufficient detail to enable one of ordinary skill in the art to practice the embodiments of the present disclosure, and it is to be understood that other embodiments may be utilized and that process changes, electrical changes, and / or structural changes may be made without departing from the scope of the present disclosure.

[0036] As used herein, in particular, designators such as "X", "Y", "N", "M", etc., with respect to reference numbers in the figures, indicate that several specific features specified in this manner may be included. It should also be understood that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to be restrictive. As used herein, the singular forms "a / an" and "the" may include both singular and plural indicators, unless the context clearly indicates otherwise. In addition, "several", "at least one" and "one or more" (such as several pivot points) may refer to one or more pivot points, while "multiple" is intended to refer to more than one such thing. In addition, the word "can / may" is used throughout this application in a permissive sense (i.e., with the possibility, able to) rather than in a mandatory sense (i.e., must). The term "including" and its derivatives mean "including (but not limited to)". The term "coupled / coupling" is intended to be directly or indirectly physically connected or used to access the movable handle member and move the movable handle member, depending on the context.

[0037] The figures herein follow a numbering convention in which the first digit or digits correspond to the figure number and the remaining digits identify the element or component in the figure. Similar elements or components between different figures may be identified by using similar numerals. For example, 106 may refer to element "6" in Figure 1, and similar elements in Figure 2A 206. As will be appreciated, the elements shown in the various embodiments herein may be added, exchanged, and / or eliminated to provide several additional embodiments of the present disclosure. In addition, the proportions and / or relative dimensions of the elements provided in the figures are intended to illustrate certain embodiments of the present disclosure and should not be understood in a limiting sense.

[0038] Figure 1A 1 is a schematic diagram of a surgical stapling apparatus 100 including a surgical handle assembly 102 and a reloadable cartridge assembly in a released position according to several embodiments of the present disclosure. In an example, the surgical stapling apparatus 100 may include a surgical handle assembly 102 and a reloadable cartridge assembly 103.

[0039] like Figure 1A In the example of FIG. 1 , a reloadable cartridge assembly 103 (e.g., a disposable loading unit) can be releasably fixed to the distal end of the elongated body of the surgical handle assembly 102. In this example, the reloadable cartridge assembly 103 can include a first elongated member 107 and a second elongated member 109. When the first elongated member 107 and the second elongated member 109 are clamping tissue and / or contacting each other, the reloadable cartridge assembly 103 can be in a clamped position. When the first elongated member 107 and the second elongated member 109 are not clamping tissue and / or not contacting each other, the reloadable cartridge assembly 103 can be in a released position.

[0040] In several embodiments, one of the elongated members may house one or more staple cartridges. Another elongated member may have an anvil that can be used to form staples when driven from a staple cartridge. As mentioned, the surgical stapling apparatus 100 can accommodate a reloadable cartridge assembly having several rows of staples. In several embodiments, third-party reloadable cartridges and / or reloadable cartridge assemblies can be used with the surgical handle assembly 102, and embodiments of the surgical handle assembly 102 can be configured to accommodate third-party reloadable cartridges and / or reloadable cartridge assemblies.

[0041] The surgical handle assembly 102 coupled to the reloadable cartridge assembly 103 can advance the reloadable cartridge assembly 103 to the clamped position in response to the user actuating the movable handle member 104 of the surgical handle assembly 102 in the proximal direction. The user can also advance the reloadable cartridge assembly 103 to the released position in response to the user actuating the movable handle member 104 in the distal direction.

[0042] In several embodiments, surgical handle assembly 102 coupled to reloadable cartridge assembly 103 can deploy a number of staples. Reloadable cartridge assembly 103 can deploy a number of staples in response to a user pressing button 106 and moving movable handle member 104 to the proximal-most position. Button 106 can be pressed from the right-hand side or the left-hand side of surgical handle assembly 102. When movable handle member 104 cannot move further in the proximal direction, movable handle member 104 can be in the proximal-most position.

[0043] When button 106 is pressed, reloadable cartridge assembly 103 is no longer prevented from delivering a plurality of nails. Once button 106 is in the pressed position, a plurality of nails can be ejected in response to a user actuating movable handle member 104 in the proximal direction.

[0044] When the button 106 is pressed, the movable handle member 104 is free to move to the distal-most position. The movable handle member 104 is in the distal-most position when the movable handle member 104 cannot move further in the distal direction. When the button 106 is pressed, it also allows the reloadable cartridge assembly 103 to stay in the clamped position even when the movable handle member 104 is moved to the distal-most position.

[0045] The user can advance the movable handle member 104 from the most distal position to the most proximal position. Since the user has pressed the button 106 and no longer prevents the reloadable cartridge assembly 103 from delivering a number of nails, a number of nails can be delivered in response to the user advancing the movable handle member 104 in the proximal direction.

[0046] When the user has finished delivering the nail, the user can return the surgical handle assembly 102 and the reloadable cartridge assembly 103 to the starting position. In the starting position, the button 106 can be in an unpressed position, the movable handle member 104 can be in a distal position, and the reloadable cartridge assembly 103 can be in a released position. The user can return the surgical handle assembly 102 and the reloadable cartridge assembly 103 to the starting position by engaging the retraction handles 105 on both sides of the surgical handle assembly 102 and pulling the retraction handles 105 in a linear proximal direction. In some examples, the retraction handle 105 can be used in response to the surgical stapling device 100 failing to release.

[0047] For ease of understanding and illustration, the surgical handle assembly 102 is described throughout this disclosure with respect to the example of the surgical stapling apparatus 100. However, the embodiments are not limited to use with the surgical stapling apparatus 100.

[0048] Figure 1B is a schematic diagram of a surgical stapling apparatus 100 including a surgical handle assembly 102 and a reloadable cartridge assembly 103 in a clamped position, according to several embodiments of the present disclosure.

[0049] like Figure 1B In the example of FIG. 1 , a reloadable cartridge assembly 103 (e.g., a disposable loading unit) can be releasably fixed to the distal end of the elongated body of the surgical handle assembly 102. In this example, the reloadable cartridge assembly 103 can include a first elongated member 107 and a second elongated member 109. When the first elongated member 107 and the second elongated member 109 are clamping tissue and / or contacting each other, the reloadable cartridge assembly 103 can be in a clamped position. When the first elongated member 107 and the second elongated member 109 are not clamping tissue and / or not contacting each other, the reloadable cartridge assembly 103 can be in a released position.

[0050] In several embodiments, one of the elongated members may house one or more staple cartridges. Another elongated member may have an anvil that can be used to form staples when driven from a staple cartridge. As mentioned, the surgical stapling apparatus 100 can accommodate a reloadable cartridge assembly having several rows of staples. In several embodiments, third-party reloadable cartridges and / or reloadable cartridge assemblies can be used with the surgical handle assembly 102, and embodiments of the surgical handle assembly 102 can be configured to accommodate third-party reloadable cartridges and / or reloadable cartridge assemblies.

[0051] The surgical handle assembly 102 coupled to the reloadable cartridge assembly 103 can advance the reloadable cartridge assembly 103 to the clamped position in response to the user actuating the movable handle member 104 of the surgical handle assembly 102 in the proximal direction. The user can also advance the reloadable cartridge assembly 103 to the released position in response to the user actuating the movable handle member 104 in the distal direction.

[0052] In several embodiments, surgical handle assembly 102 coupled to reloadable cartridge assembly 103 can deploy a number of staples. Reloadable cartridge assembly 103 can deploy a number of staples in response to a user pressing button 106 and moving movable handle member 104 to the proximal-most position. Button 106 can be pressed from the right-hand side or the left-hand side of surgical handle assembly 102. When movable handle member 104 cannot move further in the proximal direction, movable handle member 104 can be in the proximal-most position.

[0053] When button 106 is pressed, reloadable cartridge assembly 103 is no longer prevented from delivering a plurality of nails. Once button 106 is pressed, a plurality of nails can be ejected in response to a user actuating movable handle member 104 in the proximal direction.

[0054] When the button 106 is pressed, the movable handle member 104 is free to move to the distal-most position. The movable handle member 104 is in the distal-most position when the movable handle member 104 cannot move further in the distal direction. When the button 106 is pressed, it also allows the reloadable cartridge assembly 103 to stay in the clamped position even when the movable handle member 104 is moved to the distal-most position.

[0055] The user can advance the movable handle member 104 from the most distal position to the most proximal position. Since the user has pressed the button 106 and no longer prevents the reloadable cartridge assembly 103 from delivering a number of nails, a number of nails can be delivered in response to the user advancing the movable handle member 104 in the proximal direction.

[0056] When the user has finished delivering the nail, the user can return the surgical handle assembly 102 and the reloadable cartridge assembly 103 to the starting position. In the starting position, the button 106 can be in an unpressed position, the movable handle member 104 can be in a distal position, and the reloadable cartridge assembly 103 can be in a released position. The user can return the surgical handle assembly 102 and the reloadable cartridge assembly 103 to the starting position by engaging the retraction handles 105 on both sides of the surgical handle assembly 102 and pulling the retraction handles 105 in a linear proximal direction. In some examples, the retraction handle 105 can be used in response to the surgical stapling device 100 failing to release.

[0057] For ease of understanding and illustration, the surgical handle assembly 102 is described throughout this disclosure with respect to the example of the surgical stapling apparatus 100. However, the embodiments are not limited to use with the surgical stapling apparatus 100.

[0058] Figure 2A is a schematic diagram of a surgical handle assembly 202 in a released position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0059] The surgical handle assembly 202 may be in an initial released position when the movable handle member 204 is not actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in a released position. When the movable handle member 204 is in the most distal position that the movable handle member 204 can travel, the movable handle member 204 is not actuated by the user.

[0060] The drive pawl 210 can be coupled to the movable handle member 204. In some examples, the drive pawl 210 can be coupled to the movable handle member 204 via a pin, which can allow the drive pawl 210 to pivot and engage or disengage from the rack 208. When the rack 208 is in the linear most-proximal position, the rack 208 can be in the initial position. When the rack 208 is in the initial position, the drive pawl 210 can disengage from the rack 208.

[0061] The latch 212 may be coupled to the drive pawl 210. The latch 212 may be pivoted via a pin coupling the latch 212 to the drive pawl 210. In some examples, the latch 212 may be pivoted to engage or disengage the rack 208. When the rack 208 is in the initial position, the latch 212 may be disengaged from the rack 208.

[0062] The latch 212 and / or the drive pawl 210 may be disengaged from the rack via the disengagement mechanism 214. The disengagement mechanism 214 may contact the drive pawl 210 to disengage the drive pawl 210 and / or the latch 212 from the rack 208 in response to the user pressing the button 206. However, when the rack 208 is in the initial position, the disengagement mechanism 214 may not contact the drive pawl 210.

[0063] In some examples, pressing the button 206 may disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more inclined surfaces (e.g. Figure 3The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0064] The safety latch 216 can prevent the user from accidentally ejecting the nail. For example, the safety latch 216 can allow the user to press the button 206 to eject the nail. Figure 2A In the embodiment shown in FIG. 1 , the safety latch 216 is biased upward, which prevents the staples from being ejected if the user were to actuate the movable handle member 104 to the proximal direction.

[0065] Figure 2B is a schematic diagram of a surgical handle assembly 202 in a clamped position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0066] When the movable handle member 204 is fully actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in the clamped position, the surgical handle assembly 202 can be in the indexed clamped position. For example, the movable handle member 204 can be actuated by the user in the proximal direction from the distal position by squeezing the movable handle member 204 ( Figure 2A ) until the movable handle member 204 cannot travel any further in the proximal direction and is fully actuated.

[0067] As previously in Figure 2A , the drive pawl 210 may be coupled to the movable handle member 204 via a pin, which may allow the drive pawl 210 to pivot and engage or disengage from the rack 208. For example, the drive pawl 210 may be configured to engage the rack 208 and advance the rack 208 in a linear distal direction in response to the movable handle member 204 being advanced in a proximal direction. In some examples, the surgical handle assembly 202 may advance a reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) to a clamped position in response to the drive pawl 210 advancing the rack 208 in a linear distal direction.

[0068] As previously in Figure 2A , the latch 212 can be pivoted from the drive pawl 210 to engage or disengage the rack 208. When the rack 208 is in the indexed position, the latch 212 can engage the rack 208.

[0069] The disengagement mechanism 214 can contact the driving pawl 210 to disengage the driving pawl 210 and / or the latch 212 from the rack. Figure 2BIn the embodiment of the present invention, the disengagement mechanism 214 does not contact the driving claw 210.

[0070] The driving pawl 210 can be disengaged from the rack 208 in response to the user pressing the button 206. The button 206 can include one or more inclined surfaces (e.g. Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact the surface of the disengagement mechanism 214 and cause the disengagement mechanism 214 to move in a downward direction. As the disengagement mechanism 214 moves downward, the disengagement mechanism 214 may contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in a downward direction to prevent the drive pawl 210 and the latch 212 from engaging the rack 208. Figure 2B , button 206 is not in the pressed position.

[0071] In some examples, pressing the button 206 may disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more inclined surfaces (e.g. Figure 3 The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0072] As previously in Figure 2A As described in , the safety latch 216 can prevent the user from accidentally ejecting the nail. For example, the safety latch 216 can allow the user to press the button 206 to eject the nail. Figure 2B In the embodiment shown in FIG. 1 , the movable handle member 204 is in the most proximal position, but the nail is not ejected because the safety latch 216 is in the upward position, thereby preventing the rack 208 from moving further in the linear distal direction. The rack 208 may include an opening, such as a slot. The safety latch 216 in the upward position may enter the opening of the rack 208, such as Figure 2B In some examples, a safety latch 216 engaged in an opening of the rack 208 can maintain the surgical handle assembly 202 in a clamped position.

[0073] Figure 2C is a schematic diagram of a surgical handle assembly 202 in a clamped position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0074] When the movable handle member 204 is partially actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in a clamped position, the surgical handle assembly 202 may be in a clamped position between the distal-most position and the proximal-most position. In some examples, the movable handle member 204 may be maintained in a position between the distal-most position and the proximal-most position without any assistance from the user. This position may be, but is not limited to, the middle of the distal-most position and the proximal-most position.

[0075] As previously in Figure 2A , the drive pawl 210 can be coupled to the movable handle member 204 via a pin, which can allow the drive pawl 210 to pivot and engage or disengage from the rack 208. When the rack 208 is between the linear most proximal position and the linear most distal position, the drive pawl 210 can disengage from the rack 208. For example, the drive pawl 210 can disengage from the rack 208 to allow the rack 208 to move in the linear proximal direction in response to the movable handle member 204 moving in the distal direction.

[0076] As previously in Figure 2A 2, the latch 212 can be pivoted from the drive pawl 210 to engage or disengage the rack 208. In the clamped position, with the movable handle member 204 between the distal-most position and the proximal-most position, the latch 212 can engage the rack 208. The latch 212 can cause the rack 208 to advance in the linear proximal direction in response to the user moving the movable handle member 204 in the distal direction. In some examples, the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1) can move to the released position in response to the rack 208 advancing in the linear proximal direction.

[0077] The disengagement mechanism 214 can contact the driving pawl 210 to disengage the driving pawl 210 and / or the latch 212 from the rack 208. Figure 2C In the embodiment of the present invention, the disengagement mechanism 214 does not contact the driving claw 210.

[0078] The latch 212 can be disengaged from the rack 208 in response to the user pressing the button 206. The button 206 can include one or more inclined surfaces (e.g. Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact one or more inclined surfaces of the disengagement mechanism 214 (e.g., Figure 3The inclined surfaces 324-1, 324-2 in the rack 208 are moved to the disengagement mechanism 214 and cause the disengagement mechanism 214 to move in a downward direction. As the disengagement mechanism 214 moves downward, the disengagement mechanism 214 can contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in a downward direction to prevent the latch 212 from engaging the rack 208. Figure 2C , button 206 is not in the pressed position.

[0079] In some examples, pressing the button 206 may disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more inclined surfaces (e.g. Figure 3 The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0080] The safety latch 216 can prevent the user from accidentally ejecting the nail. For example, the safety latch 216 can allow the user to press the button 206 to eject the nail. Figure 2C In the embodiment of the present invention, the safety latch 216 is in the upward position, which can prevent the nail from being ejected if the user actuates the movable handle member 204 in the proximal direction. The rack 208 can include an opening, such as a slot. The safety latch 216 in the upward position can enter the opening of the rack 208, such as Figure 2C In some examples, a safety latch 216 engaged in an opening of the rack 208 can maintain the surgical handle assembly 202 in the clamped position.

[0081] Figure 2D is a schematic diagram of a surgical handle assembly 202 in a released position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0082] When the movable handle member 204 is partially actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in the released position, the surgical handle assembly 202 may be in the released position, wherein the movable handle member 204 is between the distal-most position and the proximal-most position. In some examples, the movable handle member 204 may be maintained in the released position between the distal-most position and the proximal-most position without any assistance from the user. The released position of the movable handle member 204 between the distal-most position and the proximal-most position may be, but is not limited to, the middle of the distal-most position and the proximal-most position.

[0083] As previously in Figure 2A , the drive pawl 210 can be coupled to the movable handle member 204 via a pin, which can allow the drive pawl 210 to pivot and engage or disengage from the rack 208. In a released position in which the movable handle member 204 is between the distal-most position and the proximal-most position, the drive pawl 210 can engage the rack 208. For example, the drive pawl 210 can engage the rack 208 to allow the drive pawl 208 to advance the rack 208 in a linear distal direction in response to the movable handle member 204 moving in the proximal direction toward the index position.

[0084] As previously in Figure 2A 2, the latch 212 can be pivoted from the drive pawl 210 to engage or disengage the rack 208. The latch 212 can be biased by a spring to engage the rack 208. In some examples, the spring can bias the latch 212 in a counterclockwise direction. In a clamped position in which the movable handle member 204 is between the distal-most position and the proximal-most position, the latch 212 can engage the rack 208. The latch 212 can push the rack 208 in a linear proximal direction in response to the user moving the movable handle member 204 in the distal direction to release.

[0085] The disengagement mechanism 214 can contact the drive pawl 210 to disengage the drive pawl 210 and / or the latch 212 from the rack 208. In some examples, the disengagement mechanism 214 does not contact the drive pawl 210 in a released position where the movable handle member 204 is between the distal-most position and the proximal-most position.

[0086] The driving pawl 210 can be disengaged from the rack in response to the user pressing the button 206. The button 206 can include one or more inclined surfaces (e.g. Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact one or more inclined surfaces of the disengagement mechanism 214 (e.g., Figure 3 The inclined surfaces 324-1, 324-2 in the rack 208 are moved to the disengagement mechanism 214 and cause the disengagement mechanism 214 to move in a downward direction. As the disengagement mechanism 214 moves downward, the disengagement mechanism 214 can contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in a downward direction to prevent the drive pawl 210 and the latch 212 from engaging the rack 208. Figure 2D , button 206 is not in the pressed position.

[0087] exist Figure 2DIn some examples, the safety latch 216 in the lowered position can engage the rack 208 to prevent the rack 208 from moving further from the index position in the linear distal direction.

[0088] Figure 2E is a schematic diagram of a surgical handle assembly 202 in a clamped position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0089] exist Figure 2E , the surgical handle assembly 202 may be transitioned to the ready-to-fire position and the movable handle member 204 may be in a position between the distal-most position and the proximal-most position.

[0090] When the surgical handle assembly 202 is transformed to the ready-to-fire position, the latch 212 can be disengaged from the rack 208 in response to the user depressing the button 206. The button 206 can include one or more inclined surfaces (e.g., Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact one or more inclined surfaces of the disengagement mechanism 214 (e.g., Figure 3 The inclined surfaces 324-1, 324-2 in the rack 208 are moved to the disengagement mechanism 214 and cause the disengagement mechanism 214 to move in a downward direction. As the disengagement mechanism 214 moves downward, the disengagement mechanism 214 can contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in a downward direction to prevent the latch 212 from engaging the rack 208. Figure 2E , button 206 is in the pressed position.

[0091] exist Figure 2E In the embodiment, pressing the button 206 can also disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more inclined surfaces (e.g. Figure 3 The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0092] Figure 2Fis a schematic diagram of a surgical handle assembly 202 in a clamped position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0093] When the movable handle member 204 is not actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in the clamped position, the surgical handle assembly 202 may be in the ready-to-fire position. When the movable handle member 204 is in the distal-most position, the movable handle member 204 is not actuated by the user.

[0094] In the ready-to-fire position, the drive pawl 210 may be disengaged from the rack 208 , the latch 212 may be disengaged from the rack 208 , and the disengagement mechanism 214 may not contact the drive pawl 210 .

[0095] The latch 212 can be disengaged from the rack 208 in response to the user pressing the button 206. The button 206 can include one or more inclined surfaces (e.g. Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact one or more inclined surfaces of the disengagement mechanism 214 (e.g., Figure 3 The inclined surfaces 324-1, 324-2 in the rack 208 are moved to the disengagement mechanism 214 and cause the disengagement mechanism 214 to move in a downward direction. As the disengagement mechanism 214 moves downward, the disengagement mechanism 214 can contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in a downward direction to prevent the latch 212 from engaging the rack 208. Figure 2F , button 206 is in the pressed position.

[0096] In some examples, pressing the button 206 may disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more inclined surfaces (e.g. Figure 3 The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0097] The safety latch 216 can prevent the user from accidentally ejecting the nail. For example, the safety latch 216 can allow the user to press the button 206 to eject the nail. Figure 2FIn the embodiment shown in FIG. 2 , the safety latch 216 is in the downward position, which may allow the staples to be ejected if the user were to actuate the movable handle member 204 in the proximal direction.

[0098] Figure 2G is a schematic diagram of a surgical handle assembly 202 in a released position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0099] When the disengagement mechanism 214 is lowered in response to the user depressing the button 206, the surgical handle assembly 202 can be disengaged from the Figure 2D Move the release position described in to the starting position ( Figure 2A ).

[0100] When the movable handle member 204 is in a position between the distal-most position and the proximal-most position, the drive pawl 210 may be disengaged from the rack 208 , the latch 212 may be disengaged from the rack 208 , and the disengagement mechanism 214 may contact the drive pawl 210 .

[0101] The latch 212 can be disengaged from the rack 208 in response to the user pressing the button 206. The button 206 can include one or more inclined surfaces (e.g. Figure 3 When the button 206 is pressed, one of the one or more inclined surfaces of the button 206 may contact one or more inclined surfaces of the disengagement mechanism 214 (e.g., Figure 3 The inclined surfaces 324-1, 324-2 in the rack 208 are moved downwardly to contact the drive pawl 210 and move the drive pawl 210 and the latch 212 in the downward direction to prevent the drive pawl 210 and / or the latch 212 from engaging the rack 208. Figure 2G , button 206 is in the pressed position.

[0102] exist Figure 2G In the embodiment, the safety button 216 is biased downward by the disengagement mechanism 214 so that one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 will not contact one or more inclined surfaces (e.g. Figure 3 326-1, 326-2 in the middle), and when the user presses the button 206, the safety latch 216 will not move in the downward direction.

[0103] Figure 2His a schematic diagram of a surgical handle assembly 202 in a clamped position according to several embodiments of the present disclosure, including a movable handle member 204, a button 206, a rack 208, a drive pawl 210, a latch 212, a disengagement mechanism 214, and a safety latch 216.

[0104] When the movable handle member 204 is fully and / or partially actuated by the user and the reloadable cartridge assembly (e.g., the reloadable cartridge assembly 103 in FIG. 1 ) is in the clamped position, the surgical handle assembly 202 may be in the firing mode, such as Figure 2H Displayed in.

[0105] When surgical handle assembly 202 is firing, drive pawl 210 may engage rack 208 , latch 212 cannot engage rack 208 to advance rack 208 in a linear proximal direction, and disengagement mechanism 214 cannot contact drive pawl 210 .

[0106] exist Figure 2H In some examples, pressing the button 206 may disengage the safety latch 216. When the button 206 is pressed, one or more inclined surfaces (e.g. Figure 3 One of the inclined surfaces 322-1, 322-2 in the safety latch 216 may contact one or more surfaces (e.g. Figure 3 The inclined surfaces 326-1, 326-2 in the lower part of the upper part of the lower part) and cause the safety latch 216 to move in the downward direction. In the lowered position, the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving further in the linear distal direction so that the nail can be delivered.

[0107] The safety latch 216 can prevent the user from accidentally ejecting the nail. For example, the safety latch 216 can allow the user to press the button 206 to eject the nail. Figure 2H , the safety latch 216 cannot engage the rack 208 to prevent the rack 208 from moving in the linear distal direction, and the nail can be ejected as the user continues to actuate the movable handle member 204 in the proximal direction.

[0108] Figure 3 is a schematic diagram of a security latch 316 , a button 306 , and a disengagement mechanism 314 according to several embodiments of the present disclosure.

[0109] The safety latch 316 may include one or more inclined surfaces 326 - 1 , 326 - 2 , the button 306 may include one or more inclined surfaces 320 - 1 , 320 - 2 , 322 - 1 , 322 - 2 , and the disengagement mechanism 314 may include one or more inclined surfaces 324 - 1 , 324 - 2 .

[0110] One or more inclined surfaces 320-1, 320-2 of the button 306 may contact one or more inclined surfaces 324-1, 324-2 of the disengagement mechanism 314 to activate the disengagement mechanism 314 and move the disengagement mechanism 314 in a downward direction. For example, the inclined surface 320-1 of the button 306 may be a surface parallel to the inclined surface 324-1 of the disengagement mechanism 314 and may contact the inclined surface 324-1 of the disengagement mechanism 314, and / or the inclined surface 320-2 of the button 306 may be a surface parallel to the inclined surface 324-2 of the disengagement mechanism 314 and may contact the inclined surface 324-2 in response to the user pressing the button 306.

[0111] The one or more inclined surfaces 322-1, 322-2 of the button 306 may contact the one or more inclined surfaces 326-1, 326-2 of the safety latch 316 to move the safety latch 316 in the downward direction. For example, the inclined surface 322-1 of the button 306 may be a surface parallel to the inclined surface 326-1 of the safety latch 316 and may contact the inclined surface 326-1 of the safety latch 316, and / or the inclined surface 322-2 of the button 306 may be a surface parallel to the inclined surface 326-2 of the safety latch 316 and may contact the inclined surface 326-2 of the safety latch 316 in response to the user pressing the button 306.

[0112] In some examples, the safety latch 316 may include one or more notches 328-1, 328-2. The one or more notches 328-1, 328-2 may each include one or more inclined surfaces to each create an indentation in the safety latch 316. When the button 306 is pressed toward the ready-to-fire position, as shown in FIG. Figure 2F , the button 306 is locked inside the 328-1 or 328-2 notch of the safety latch 316. For example, if the button 306 is from a surgical handle assembly (e.g. Figures 2A to 2H When the button 306 is pressed from a first side of the surgical handle assembly), the button 306 will lock with the notch 328-1, and if the button 306 is pressed from a second side of the surgical handle assembly, the button 306 will lock with the notch 328-2.

[0113] The locking of the button 306 with the notch 328-1 or the notch 328-2 may produce a noise. For example, the noise may be a click noise audible to the user. The noise may alert the user that the disengagement mechanism 314 has biased the safety latch 316 in the downward direction so that the safety latch 316 is engaged with the rack (e.g. Figures 2A to 2H The rack 208 in the embodiment of the present invention is disengaged, and the surgical handle assembly (e.g. Figures 2A to 2H The surgical handle assembly 202 in is now in the firing mode.

[0114] In some examples, the locking of the button 306 with the notch 328-1 or the notch 328-2 may generate a physical cue. For example, the physical cue may be a click that can be felt by the user. The physical cue may alert the user that the disengagement mechanism 314 has biased the safety latch 316 in a downward direction to engage the safety latch 316 with the rack (e.g. Figures 2A to 2H The rack 208 in the embodiment of the present invention is disengaged, and the surgical handle assembly (e.g. Figures 2A to 2H The surgical handle assembly 202 in is now in the firing mode.

[0115] Although specific embodiments have been illustrated and described herein, it will be appreciated by those skilled in the art that arrangements for achieving the same result calculations may replace the specific embodiments shown. The present disclosure is intended to cover debugging or changes to one or more embodiments of the present disclosure. It should be understood that the above description is provided in an illustrative and non-restrictive manner. After reviewing the above description, those skilled in the art should understand the combination of the above embodiments and other embodiments not explicitly described herein. The scope of one or more embodiments of the present disclosure includes other applications in which the above structures and processes are used. Therefore, the scope of one or more embodiments of the present disclosure should be determined with reference to the attached claims and the full range of equivalents to which such claims are entitled.

[0116] In the foregoing detailed description, some features are grouped together in a single embodiment for the purpose of simplifying the present disclosure. This method of the present disclosure should not be interpreted as reflecting the intention that the disclosed embodiments of the present disclosure must use more features than those explicitly stated in each claim. The fact is that, as reflected in the following claims, the subject matter of the invention lies in less than all the features of the disclosed single embodiment. Therefore, the attached claims are hereby incorporated into the detailed description, with each claim independently serving as a separate embodiment.

Claims

1. A surgical handle assembly device, comprising: rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to advancement of the movable handle member in a proximal direction; and A latch is configured to engage the rack and advance the rack in a linear proximal direction in response to advancement of the movable handle member in a distal direction.

2. The apparatus of claim 1, wherein the reloadable cartridge assembly is advanced to the clamped position in response to the drive pawl advancing the rack in the linear distal direction.

3. The apparatus of claim 1 , wherein the reloadable cartridge assembly is advanced to a released position in response to the latch advancing the rack in the linear proximal direction.

4. The apparatus of claim 1, further comprising a disengagement mechanism.

5. The apparatus of claim 4, wherein the disengagement mechanism is configured to disengage the drive pawl from the rack.

6. The apparatus of claim 4, wherein the disengagement mechanism is configured to disengage the latch from the rack.

7. A surgical handle assembly device, comprising: rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; and A disengagement mechanism is configured to disengage the drive pawl from the rack.

8. The apparatus of claim 7, wherein the disengagement mechanism is further configured to disengage a latch from the rack.

9. The apparatus of claim 7, further comprising a button for activating the disengagement mechanism.

10. The apparatus of claim 7, further comprising a movable handle member.

11. The apparatus of claim 10, wherein the rack is advanced in a linear proximal direction in response to the movable handle member being advanced in a distal direction.

12. The apparatus of claim 10, wherein the surgical handle assembly apparatus ejects one or more staples in response to a safety latch being disengaged and the movable handle member being advanced in a proximal direction.

13. A surgical handle assembly device comprising: rack; a movable handle member; and A drive pawl that disengages from the rack when the surgical handle assembly device is in a ready-to-fire position, wherein the drive pawl is configured to engage the rack and advance the rack in a linear distal direction in response to advancement of the movable handle member in a proximal direction, thereby placing the surgical handle assembly device in a firing mode from the ready-to-fire position.

14. The apparatus of claim 13, comprising a latch configured to disengage from a slot in the rack in response to the surgical handle assembly apparatus being placed in the ready-to-fire position.

15. The apparatus of claim 14, wherein the latch is configured to disengage from the slot in the rack to prevent the latch from advancing the rack in a linear proximal direction.

16. The apparatus of claim 13, comprising a disengagement mechanism configured to disengage from the drive pawl in response to the surgical handle assembly apparatus being in the firing mode.

17. The apparatus of claim 16, wherein the disengagement mechanism disengages the drive pawl to prevent the disengagement mechanism from disengaging the drive pawl from the rack.

18. A surgical handle assembly device comprising: rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; a disengagement mechanism configured to disengage the drive pawl from the rack to transition the surgical handle assembly apparatus to a ready-to-fire position; and A movable handle member connected to the drive pawl, wherein the movable handle member is configured to move between a proximal position and a distal position, and wherein the surgical handle assembly apparatus is in the ready-to-fire position in response to the drive pawl being disengaged from the rack and the movable handle member being in the distal position.

19. The apparatus of claim 18, comprising a button, wherein the disengagement mechanism is configured to disengage the drive pawl from the rack in response to the button being depressed.

20. The apparatus of claim 19, wherein the button is configured to contact the disengagement mechanism in response to the button being pressed.

21. The apparatus of claim 20, wherein the sloped surface of the button is configured to contact the disengagement mechanism and to move the disengagement mechanism in a downward direction in response to the sloped surface contacting the disengagement mechanism.

22. The apparatus of claim 21, wherein the disengagement mechanism is configured to disengage the drive pawl from the rack in response to the disengagement mechanism moving in a downward direction.

23. The apparatus of claim 22, wherein the drive pawl is configured to move in a downward direction and disengage from the rack in response to the disengagement mechanism contacting the drive pawl.

24. The apparatus of claim 23, comprising a latch connected to the drive pawl.

25. The apparatus of claim 24, wherein the drive pawl is configured to move upward in a downward direction and disengage the latch from the rack in response to the disengagement mechanism contacting the drive pawl.

26. A surgical handle assembly device comprising: rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to advancement of the movable handle member in a proximal direction; and A disengagement mechanism configured to disengage the drive pawl from the rack to transition the surgical handle assembly device to a ready-to-fire position, wherein the drive pawl is configured to move in the proximal direction in response to the movable handle member moving in the distal direction to place the surgical handle assembly device in the ready-to-fire position, and wherein the drive pawl is configured to re-engage the rack and advance the rack in the linear distal direction in response to the movable handle member being advanced in the proximal position, thereby placing the surgical handle assembly device in a firing mode.

27. The apparatus of claim 26, wherein the surgical handle assembly apparatus is connected to a reloadable cartridge assembly.

28. The apparatus of claim 27, wherein the reloadable cartridge assembly is in a released position before the drive pawl engages the rack and advances the rack in the linear distal direction, and before the disengagement mechanism disengages the drive pawl from the rack.

29. The apparatus of claim 27, wherein in response to the surgical handle assembly apparatus being in the ready-to-fire position, the reloadable cartridge assembly is in a clamped position.

30. The apparatus of claim 27, wherein in response to the surgical handle assembly apparatus being in the firing mode, the reloadable cartridge assembly is in a clamped position.

31. The apparatus of claim 27, wherein the reloadable cartridge assembly is configured to fire staples in response to the surgical handle assembly apparatus being in the firing mode and the movable handle member being partially actuated.

32. The apparatus of claim 27, wherein the reloadable cartridge assembly is configured to fire staples in response to the surgical handle assembly apparatus being in the firing mode and the movable handle member being fully actuated.

33. A surgical handle assembly device comprising: rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to advancement of the movable handle member in a proximal direction; a latch configured to engage the rack and to advance the rack in a linear proximal direction in response to advancement of the movable handle member in a distal direction; and A disengagement mechanism is configured to contact the drive pawl to disengage the drive pawl and the latch from the rack.

34. The apparatus of claim 33, further comprising a reloadable cartridge assembly connected to the surgical handle assembly apparatus.

35. The apparatus of claim 34, wherein the reloadable cartridge assembly is advanced to a clamped position in response to the drive pawl advancing the rack in the linear distal direction.

36. The apparatus of claim 34, wherein the reloadable cartridge assembly is advanced to a released position in response to the latch advancing the rack in the linear proximal direction.

37. The apparatus of claim 33, wherein in response to the drive pawl and the latch being disengaged from the rack, the drive pawl and the latch are not in contact with the rack.

38. The apparatus of claim 33, further comprising a button, wherein the disengagement mechanism is configured to disengage the drive pawl and the latch from the rack in response to the button being depressed.

39. A surgical handle assembly device comprising: rack; a drive pawl configured to engage the rack and advance the rack in a linear distal direction; and A disengagement mechanism is configured to move downwardly and contact the drive pawl to disengage the drive pawl from the rack.

40. The apparatus of claim 39, wherein the disengagement mechanism is further configured to disengage a latch from the rack.

41. The apparatus of claim 39, further comprising a button for activating the disengagement mechanism.

42. The apparatus of claim 39, further comprising a movable handle member.

43. The apparatus of claim 42, wherein the rack is advanced in a linear proximal direction in response to advancement of the movable handle member in a distal direction.

44. The apparatus of claim 42, wherein the surgical handle assembly apparatus ejects one or more staples in response to disengaging a safety latch and advancing the movable handle member in a proximal direction.

45. A surgical handle assembly device comprising: rack; a movable handle member; a drive pawl configured to engage the rack and advance the rack in a linear distal direction in response to advancement of the movable handle member in a proximal direction; a latch configured to engage the rack and to advance the rack in a linear proximal direction in response to advancement of the movable handle member in a distal direction; A button is configured to activate a disengagement mechanism that moves downward to contact the drive pawl and disengage the drive pawl and the latch from the rack.

46. ​​The apparatus of claim 45, further comprising a reloadable cartridge assembly connected to the surgical handle assembly apparatus.

47. The apparatus of claim 46, wherein the reloadable cartridge assembly ejects one or more staples in response to activating the disengagement mechanism and advancing the movable handle member in the proximal direction.

48. The apparatus of claim 47, wherein the rack moves in a linear distal direction.

49. The apparatus of claim 46, wherein the reloadable cartridge assembly moves to a released position in response to advancing the movable handle member in the distal direction.

50. The apparatus of claim 49, wherein the rack moves in a linear proximal direction.

51. The apparatus of claim 45, wherein the drive pawl and the latch are connected by a pin.

52. The apparatus of claim 45, wherein the button includes one or more sloped surfaces to contact one or more sloped surfaces of the disengagement mechanism to activate the disengagement mechanism.

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