Surgical stapling device with locking member

Patent metadata

Field	Value
Publication number	US-9615827-B2
Application number	US-201313803172-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Oct 5, 2001
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A surgical stapling device for sequentially applying a plurality of fasteners to body tissue and simultaneously incising tissue is provided. The surgical stapling device is adapted to receive disposable loading units having staples in linear rows whose length can be between about 30 mm and 60 mm. The disposable loading unit includes a proximal body portion, a mounting assembly and a tool assembly. The mounting assembly is secured to the proximal end of the tool assembly and pivotally mounted about a pivot axis to the distal end of the proximal body portion. A support member or blow-out plate assembly is positioned on opposite sides of the pivot axis and extends between the proximal body portion and the mounting assembly.

First claim

What is claimed is:

1. A surgical stapling device comprising:
an elongated body portion defining a longitudinal axis;
a tool assembly supported on a distal end of the elongated body portion, the tool assembly including a cartridge assembly and an anvil assembly, the cartridge assembly supporting a plurality of staples;
a drive member movable within the elongated body portion and through the tool assembly to fire the plurality of staples from the cartridge assembly; and
a locking member supported on a proximal end of the drive member, the locking member being releasably secured within the elongated body portion and configured to prevent axial movement of the drive member prior to the firing of the plurality of staples from the cartridge assembly of the stapling device until a predetermined force has been applied to the drive member, wherein the application of the predetermined force to the drive member effects movement of the locking member within the elongated body portion.

2. A stapling device according to claim 1 , wherein the locking member includes first and second legs connected by a cross member.

3. A stapling device according to claim 2 , wherein the cross member is configured for positioning within a slot formed in the drive member.

4. A stapling device according to claim 2 , wherein each leg includes a lateral protrusion.

5. A stapling device according to claim 1 , wherein the tool assembly is pivotally supported at the distal end of the elongated body portion about a pivot axis extending transversely in relation to the longitudinal axis of the elongated body portion.

6. A stapling device according to claim 5 further including a support member positioned adjacent the pivot axis on a side of the drive member, the support member having a first end fixedly attached to the tool assembly, and a second end fixedly attached to the elongated body portion, the support member lengthening as the tool assembly pivots.

7. A surgical stapling device comprising:
an elongated body portion defining a longitudinal axis;
a tool assembly supported on a distal end of the elongated body portion, the tool assembly including a cartridge assembly and an anvil assembly, the cartridge assembly supporting a plurality of staples;
a drive member movable within the elongated body portion and through the tool assembly to fire the plurality of staples from the cartridge assembly; and
a locking member supported on a proximal end of the drive member, the locking member being releasably secured within the elongated body portion and configured to prevent axial movement of the drive member prior to the firing of the plurality of staples from the cartridge assembly of the stapling device until a predetermined force has been applied to the drive member;
wherein the locking member includes first and second legs connected by a cross member, each leg including a lateral protrusion, the lateral protrusions being configured for positioning within corresponding recesses formed in the elongated body portion, the lateral protrusions remaining positioned within the recesses until the predetermined force is applied to the drive member.

8. A stapling device according to claim 7 , wherein the lateral protrusions and the recesses formed in the elongated body portion are configured such that movement of the lateral protrusions from the recesses provides an audible and tactile indication that the stapling device has been actuated.

9. A surgical stapling device comprising:
an elongated body portion defining a longitudinal axis;
a tool assembly supported on a distal end of the elongated body portion, the tool assembly including a cartridge assembly and an anvil assembly, the cartridge assembly supporting a plurality of staples;
a drive member movable within the elongated body portion and through the tool assembly to fire the plurality of staples from the cartridge assembly; and
a locking member supported on a proximal end of the drive member, the locking member being releasably secured within the elongated body portion and configured to prevent axial movement of the drive member prior to the firing of the plurality of staples from the cartridge assembly of the stapling device until a predetermined force has been applied to the drive member;
wherein the locking member includes first and second legs connected by a cross member and a body having a generally H-shaped configuration.

10. A stapling device according to claim 9 , wherein the locking member further includes a pair of arms extending transversely from the body in relation to the first and second legs.

11. A disposable loading unit configured for attachment to a surgical stapling device, the disposable loading unit including:
a body portion defining a longitudinal axis;
a tool assembly supported on a distal end of the body portion, the tool assembly including a cartridge assembly and an anvil assembly, the cartridge assembly supporting a plurality of staples;
a drive member movable within the elongated body portion and through the tool assembly to fire the plurality of staples from the cartridge assembly; and
a locking member supported on the drive member, the locking member being releasably secured within the body portion and configured to prevent axial movement of the drive member prior to the firing of the plurality of staples from the cartridge assembly until a predetermined force has been applied to the drive member, wherein the application of the predetermined force to the drive member effects movement of the locking member within the body portion.

12. A disposable loading unit according to claim 11 , wherein the locking member includes first and second legs connected by a cross member.

13. A disposable loading unit according to claim 12 , wherein the cross member is configured for positioning within a slot formed in the drive member.

14. A disposable loading unit according to claim 12 , wherein each leg includes a lateral protrusion.

15. A disposable loading unit according to claim 11 , wherein the tool assembly is pivotally supported at the distal end of the body portion about a pivot axis extending transversely in relation to the longitudinal axis of the body portion.

16. A disposable loading unit configured for attachment to a surgical stapling device, the disposable loading unit including:
a body portion defining a longitudinal axis;
a tool assembly supported on a distal end of the body portion, the tool assembly including a cartridge assembly and an anvil assembly, the cartridge assembly supporting a plurality of staples;
a drive member movable within the elongated body portion and through the tool assembly to fire the plurality of staples from the cartridge assembly; and
a locking member supported on the drive member, the locking member being releasably secured within the body portion and configured to prevent axial movement of the drive member prior to the firing of the plurality of staples from the cartridge assembly until a predetermined force has been applied to the drive member;
wherein the locking member includes first and second legs connected by a cross member, each leg including a lateral protrusion, the lateral protrusions being configured for positioning within corresponding recesses formed in the elongated body portion, the lateral protrusions remaining positioned within the recesses until the predetermined force is applied to the drive member.

17. A disposable loading unit according to claim 16 , wherein the lateral protrusions and the recesses formed in the elongated body portion are configured such that movement of the lat

Assignees

• Covidien Lp

Inventors

• Wenchell Thomas
• Marczyk Stanislaw
• Whitfield Kenneth H
• Czernik Roman
• Holsten Henry E
• Maffei Frank C

Classifications

• A61B2017/2927

  the angular position of the head being adjustable with respect to the shaft · CPC title

• A61B2090/0808

  for indicating correct assembly of components, e.g. of the surgical apparatus · CPC title

• A61B2017/0046

  with a releasable handle; with handle and operating part separable · CPC title

• A61B90/03

  Automatic limiting or abutting means, e.g. for safety · CPC title

• A61B2017/00115

  with audible or visual output · CPC title