# US 11,121,757 B2 · Reusable circular stapler handle with open assembly architecture

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- Number: US 11,121,757 B2
- Document ID: US11121757B2
- Status: Granted
- Kind: B2
- Application number: 16/115,989
- Filed: 2018-08-29
- Published: 2018-12-27
- Granted: 2021-09-14
- Earliest claimed: 2011-05-19
- Assignees: Cilag GmbH International
- Applicants: Ethicon LLC
- Inventors: Anil K. Nalagatla; Barry Thomas Jamison; Debasish Pradhan; David A. Deupree; Abdul Gani Sofi
- Web page: https://patentgrep.com/patent/US11121757B2

## CPC

- H04B 7/0673: {using feedback from receiving side}
- A61B 17/068: Surgical staplers {, e.g. containing multiple staples or clamps}({staplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105;} for performing anastomosis A61B17/115; {staplers in general B25C5/00})
- A61B 17/07292: {Reinforcements for staple line, e.g. pledgets}
- A61B 17/1114: {of the digestive tract, e.g. bowels or oesophagus}
- A61B 17/115: Staplers for performing anastomosis, e.g. in a single operation
- A61B 17/1155: {Circular staplers comprising a plurality of staples}
- H04B 7/0671: {using different delays between antennas}
- H04B 7/0682: {using phase diversity (e.g. phase sweeping)}
- A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)}
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2017/00845: {of moving parts with respect to each other}
- A61B 2017/0725: {with settable gap between anvil and cartridge, e.g. for different staple heights at different shots}
- A61B 2017/07257: {characterised by its anvil}
- A61B 2017/2904: {curved, but rigid}
- A61B 2017/293: {with means preventing relative rotation between the shaft and the actuating rod}
- A61B 2017/2946: {Locking means}
- A61B 2090/037: {with a frangible part, e.g. by reduced diameter}
- A61B 2090/0801: {Prevention of accidental cutting or pricking}
- A61B 2090/0811: {for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument}
- A61B 2090/0813: {Accessories designed for easy sterilising, i.e. re-usable}
- A61B 2090/0814: {Preventing re-use}
- Y10T 29/4984: Retaining clearance for motion between assembled parts
- H04B: TRANSMISSION
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A circular stapling instrument is provided. The circular stapling instrument includes a handle forming a cavity, a reciprocating drive shaft, a carrier cover, and a shaft assembly. The reciprocating drive shaft is detachably secured within the cavity of the handle. The carrier cover covers a portion of the reciprocating drive shaft within the cavity of the handle. The shaft assembly is detachably coupled with the handle.

## Claims

### Claim 1

A circular stapling instrument comprising:
a reciprocating drive shaft having an engagement member at a tip of the reciprocating drive shaft and a threaded adjustment member at a base of the reciprocating drive shaft;
a firing bar forming an engagement groove and having an engagement shaft that forms an opening through which the tip of the reciprocating drive shaft is received;
a handle having a firing trigger and forming a cavity which receives the firing bar and the reciprocating drive shaft, wherein an upper end of the firing trigger engages the engagement groove and detachably secures the firing bar and the reciprocating drive shaft within the cavity of the handle;
a carrier cover covering a portion of the firing bar and the reciprocating drive shaft;
a shaft assembly detachably coupled with the handle; and
a stapling reload assembly detachably coupled to the shaft assembly, the reload assembly comprising:
a casing,
a staple holder attached to the casing,
a staple driver comprising a driver alignment surface, the staple driver receivable within the casing and configured to move within the casing from a pre-fired position to a fired position, and
an anvil assembly comprising an anvil base surface, an anvil alignment surface, and a staple forming surface, the anvil base surface configured to move from an open position away from the casing to a closed position adjacent the casing, wherein the anvil alignment surface is configured to mate with the driver alignment surface, to rotationally align the staple forming surface with the staple holder, when the anvil base surface is in the closed position.

### Claim 2 (depends on 1)

The circular stapling instrument of claim 1, wherein the carrier cover forms an opening through which a threaded portion of the handle is received.

### Claim 3 (depends on 1)

The circular stapling instrument of claim 1, wherein the shaft assembly has a connecting nut which is detachably coupled with a threaded portion on the handle.

### Claim 4 (depends on 1)

The circular stapling instrument of claim 1 further comprising an anvil closure knob detachably coupled with the threaded adjustment member of the reciprocating drive shaft.

### Claim 5

A circular stapling instrument comprising:
a handle forming a cavity;
a reciprocating drive shaft detachably secured within the cavity of the handle;
a carrier cover covering a portion of the reciprocating drive shaft within the cavity of the handle;
a shaft assembly detachably coupled with the handle; and
a stapling reload assembly detachably coupled to the shaft assembly, the reload assembly comprising:
a casing,
a staple holder attached to the casing,
a staple driver comprising a driver alignment surface, the staple driver receivable within the casing and configured to move within the casing from a pre-fired position to a fired position, and
an anvil assembly comprising an anvil base surface, an anvil alignment surface, and a staple forming surface, the anvil base surface configured to move from an open position away from the casing to a closed position adjacent the casing, wherein the anvil alignment surface is configured to mate with the driver alignment surface, to rotationally align the staple forming surface with the staple holder, when the anvil base surface is in the closed position.

### Claim 6 (depends on 5)

The circular stapling instrument of claim 5, wherein the carrier cover is detachably secured to the handle by the shaft assembly.

### Claim 7 (depends on 5)

The circular stapling instrument of claim 5 further comprising:
a firing bar having an engagement shaft which forms an opening, wherein a tip of the reciprocating drive shaft is received through the opening of the engagement shaft, and wherein both the firing bar and the reciprocating drive shaft are detachably secured within the cavity of the handle.

### Claim 8 (depends on 7)

The circular stapling instrument of claim 7, wherein the handle includes a firing trigger having an upper end, and wherein the upper end of the firing trigger engages an engagement groove of the firing bar within the cavity of the handle.

### Claim 9 (depends on 5)

The circular stapling instrument of claim 5 further comprising an anvil closure knob detachably coupled with a threaded adjustment member of the reciprocating drive shaft.