US5718359A — Surgical stapler with lockout mechanism

Claim 1

Independent Claim 187 words

A surgical apparatus comprising: a) a cartridge supporting portion having a cartridge supported therein which contains a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge; b) an anvil supporting portion relatively movable with respect to the cartridge supporting portion and having an anvil surface against which the surgical fasteners are driven when they are ejected from the cartridge; c) a cam bar retainer operatively associated with the cartridge and retaining at least two cam bars configured to sequentially interact with the pushers as the cam bar retainer translates distally from a pre-fired proximal position; d) an actuator connected to the cam bar retainer for facilitating the translation thereof; e) a first locking member extending from the actuator and configured to releasably engage a notch provided in the cartridge supporting portion to maintain the cam bar retainer in the pre-fired proximal position; and f) a second locking member supported on the cam bar retainer and configured to engage an aperture provided within the cartridge supporting portion upon retraction of the cam bar retainer to a post-fired proximal position.

Claim 2

Dependent Claim 187 words

A surgical apparatus comprising: a) a cartridge supporting portion having a cartridge supported therein which contains a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge; b) an anvil supporting portion relatively movable with respect to the cartridge supporting portion and having an anvil surface against which the surgical fasteners are driven when they are ejected from the cartridge; c) a cam bar retainer operatively associated with the cartridge and retaining at least two cam bars configured to sequentially interact with the pushers as the cam bar retainer translates distally from a pre-fired proximal position; d) an actuator connected to the cam bar retainer for facilitating the translation thereof; e) a first locking member extending from the actuator and configured to releasably engage a notch provided in the cartridge supporting portion to maintain the cam bar retainer in the pre-fired proximal position; and f) a second locking member supported on the cam bar retainer and configured to engage an aperture provided within the cartridge supporting portion upon retraction of the cam bar retainer to a post-fired proximal position.

Claim 3

Dependent Claim 32 words

A surgical apparatus as recited in claim 1, further comprising an elongated carrier channel supported within the cartridge supporting portion and carrying the cartridge, the cam bar retainer, and the cam bars.

Claim 4

Dependent Claim 28 words

A surgical apparatus as recited in claim 2, wherein the first locking member includes a retention bar which cooperates with a release button pivotably mounted to the actuator.

Claim 5

Dependent Claim 30 words

A surgical apparatus as recited in claim 3, wherein the release button has a camming surface configured to displace the retention bar to release the retention bar from the notch.

Claim 6

Dependent Claim 26 words

A surgical apparatus as recited in claim 2, wherein the notch is formed in a side wall of the carrier channel adjacent a proximal end thereof.

Claim 7

Dependent Claim 23 words

A surgical apparatus as recited in claim 5, wherein the second locking member includes a ramped tab extending from the cam bar retainer.

Claim 8

Dependent Claim 23 words

A surgical apparatus as recited in claim 6, wherein the aperture is defined in a clasp portion formed integral with the carrier channel.

Claim 9

Dependent Claim 62 words

A surgical apparatus as recited in claim 7, wherein the clasp portion includes first and second apertures, wherein the ramped tab is positioned in the first aperture when the cam bar retainer is in the pre-fired proximal position and is positioned in the second aperture proximal of the first aperture when the cam bar retainer is retracted to a post-fired proximal position.

Claim 10

Dependent Claim 20 words

A surgical apparatus as recited in claim 2, wherein the carrier channel is removably mounted in the cartridge supporting portion.

Claim 11

Dependent Claim 147 words

A surgical apparatus comprising: a) an elongated carrier channel; b) a cartridge disposed in a distal portion of the carrier channel and containing a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge body; c) a cam bar retainer disposed within the carrier channel and configured to translate therein in a longitudinal direction; d) an actuator connected to the cam bar retainer for facilitating the longitudinal translation thereof; e) at least two elongated cam bars retained by the cam bar retainer and configured to sequentially interact with the pushers as the cam bar retainer translates in a longitudinal direction; and f) a shipping lock pivotally mounted to the actuator and configured to releasably engage the carrier channel to maintain the cam bar retainer in a pre-fired proximal position to prevent movement of the cam bar retainer during shipping.

Claim 12

Dependent Claim 147 words

A surgical apparatus comprising: a) an elongated carrier channel; b) a cartridge disposed in a distal portion of the carrier channel and containing a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge body; c) a cam bar retainer disposed within the carrier channel and configured to translate therein in a longitudinal direction; d) an actuator connected to the cam bar retainer for facilitating the longitudinal translation thereof; e) at least two elongated cam bars retained by the cam bar retainer and configured to sequentially interact with the pushers as the cam bar retainer translates in a longitudinal direction; and f) a shipping lock pivotally mounted to the actuator and configured to releasably engage the carrier channel to maintain the cam bar retainer in a pre-fired proximal position to prevent movement of the cam bar retainer during shipping.

Claim 13

Dependent Claim 43 words

A surgical apparatus as recited in claim 10 further comprising a firing locking mechanism extending from the cam bar retainer and configured to lockingly engage a clasp depending from the carrier channel to maintain the cam bar retainer in a post-fired proximal position.

Claim 14

Dependent Claim 29 words

A surgical apparatus as recited in claim 11, wherein the clasp is formed integral with the carrier channel and includes an aperture for receiving and retaining the locking mechanism.

Claim 15

Dependent Claim 62 words

A surgical apparatus as recited in claim 12, wherein the clasp includes first and second apertures and, wherein the locking mechanism is positioned in the first aperture when the cam bar retainer is in the pre-fired proximal position and is positioned in the second aperture proximal of the first aperture when the cam bar retainer is retracted to the post-fired proximal position.

Claim 16

Dependent Claim 21 words

A surgical apparatus as recited in claim 10, wherein the shipping lock includes a release button pivotably mounted to the actuator.

Claim 17

Dependent Claim 22 words

A surgical apparatus as recited in claim 14, wherein the shipping lock includes a retention bar cooperating with the pivoting release button.

Claim 18

Dependent Claim 28 words

A surgical apparatus as recited in claim 15, wherein the release button has a camming surface configured to displace the retention bar to release the cam bar retainer.

Claim 19

Dependent Claim 43 words

A surgical apparatus as recited in claim 10, further comprising a notch formed in a side wall of the carrier channel adjacent a proximal end thereof for releasably retaining the shipping lock when the cam bar retainer is in the pre-fired proximal position.

Claim 20

Dependent Claim 20 words

A surgical apparatus as recited in claim 17, wherein the pre-fired proximal position is distal of the post-fired proximal position.

Claim 21

Dependent Claim 196 words

A surgical apparatus comprising: a) a cartridge supporting portion having a cartridge disposed therein which contains a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge; b) an anvil supporting portion relatively movable with respect to the cartridge supporting portion and having an anvil surface against which the surgical fasteners are driven when they are ejected from the cartridge; c) a cam bar retainer operatively associated with the cartridge and retaining at least two cam bars configured to sequentially interact with the pushers as the cam bar retainer translates distally from a pre-fired proximal position; d) an actuator connected to the cam bar retainer for facilitating the translation thereof; e) a clasp positioned in the cartridge supporting portion and having first and second slots; and f) a detent extending from the cam bar retainer and positioned in the first slot when the cam bar retainer is in the pre-fired proximal position and positioned in the second slot when the cam bar retainer is retracted to a post-fired proximal position, wherein the engagement of the detent in the second slot prevents distal movement of the cam bar retainer.

Claim 22

Dependent Claim 196 words

A surgical apparatus comprising: a) a cartridge supporting portion having a cartridge disposed therein which contains a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge; b) an anvil supporting portion relatively movable with respect to the cartridge supporting portion and having an anvil surface against which the surgical fasteners are driven when they are ejected from the cartridge; c) a cam bar retainer operatively associated with the cartridge and retaining at least two cam bars configured to sequentially interact with the pushers as the cam bar retainer translates distally from a pre-fired proximal position; d) an actuator connected to the cam bar retainer for facilitating the translation thereof; e) a clasp positioned in the cartridge supporting portion and having first and second slots; and f) a detent extending from the cam bar retainer and positioned in the first slot when the cam bar retainer is in the pre-fired proximal position and positioned in the second slot when the cam bar retainer is retracted to a post-fired proximal position, wherein the engagement of the detent in the second slot prevents distal movement of the cam bar retainer.

Claim 23

Dependent Claim 26 words

A cartridge assembly as recited in claim 19, wherein in the post-fired proximal position of the cam bar retainer is proximal of the pre-fired proximal position.

Claim 24

Dependent Claim 32 words

A surgical apparatus as recited in claim 20, further comprising an elongated carrier channel supported within the cartridge supporting portion and carrying the cartridge, the cam bar retainer, and the cam bars.

Claim 25

Dependent Claim 18 words

A cartridge assembly as recited in claim 21, wherein the clasp is formed integral with the carrier channel.

Claim 26

Dependent Claim 46 words

A surgical apparatus as recited in claim 19, further comprising an interlock mechanism configured to maintain the cam bar retainer in a pre-fired proximal position so as to prevent premature actuation of the apparatus, the interlock mechanism including a release button pivotably mounted to the actuator.

Claim 27

Dependent Claim 47 words

A surgical apparatus as recited in claim 23, wherein the interlock mechanism includes a retention bar configured to releasably engage a notch provided in the carrier channel, and wherein the release button includes a camming surface configured to displace the retention bar from engagement with the notch.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-02-16	2001-08-18	2002-02-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-02-16	2005-08-18	2006-02-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-02-16	2009-08-18	2010-02-17	$7700.00	Window Closed / Lapsed

Surgical stapler with lockout mechanism

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