US 2014/0005700 A1Published application

Blade retention mechanism for surgical instrument

AssigneeGyrus ACMI, Inc.

InventorsJay A. Casey, Kevin C. Edwards, Tomas Matusaitis

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Abstract

A powered surgical apparatus for use with a source of irrigation fluid and a source of suction and for powering a surgical tool such as a cutting blade. The surgical apparatus includes a handpiece and a cutting blade retention assembly integrated in passage in a distal end of the handpiece. The retention assembly includes an aligned, pair of radially movable buttons, aligned in axially extending passages in communication with the passage in the distal end of the handpiece, the movable buttons can engage with and cause rotational movement of a collet member assembly rotatably supported in the passage in the distal end of the handpiece. The collet assembly includes a plurality of rolling lock members which can be moved by the collet member from a first or lock position, in which the lock members are forced by the wall of the passage to extend inwardly of the collet member to engage a groove of the surgical tool, and a second or unlocked position, in which the lock members are aligned with a recess in the wall of the passage and are not forced to extend inwardly of the collet member.

Claims18

Dependent claims

A surgical apparatus, comprising:

a. a main body including:
i. a first generally cylindrical passage having a proximal end and a distal end;
ii. a second radially extending passage extending from the first generally cylindrical passage;
and
iii. a recess;
b. a collet member supported for rotational movement in the first generally cylindrical passage of the main body, the collet member including:
i. a first surface;
and
ii. a passage having a first length;
c. a biasing member biasing the collet member in a first rotational direction within the first generally cylindrical passage of the main body;
d. a lock member having a second length, the lock member aligned in the passage of the collet member and extending radially inward beyond the inner surface of the collet member, the second length of the lock member being greater than the first length of the passage of the collet member wherein the collet member limits the lock member and retains the lock member within the first generally cylindrical passage of the main body;
and
e. an actuator radially movable in the second radially extending passage of the main body, the actuator including a second surface for engaging the first surface of the collet member wherein radially inward movement of the actuator against the force of the biasing member rotates the collet member within the first generally cylindrical passage and moves the lock member from a first locked position to a second unlocked position wherein the lock member can move radially outward to be at least partially located in the recess of the main body.

10 more elements

A surgical apparatus, comprising:

a. a main body including a nose portion for selectively coupling a disposable surgical instrument to the surgical apparatus, the nose portion including:
i. a first generally cylindrical passage having a proximal end and a distal end;
ii. a second radially extending passage extending from the first generally cylindrical passage;
and
iii. a radially and circumferentially extending channel;
b. a collet member having a proximal end and a distal end, the collet member supported for rotational movement in the first generally cylindrical passage of the nose portion, the collet member including:
i. a first radially extending member including a first surface generally aligned with a cord of the first generally cylindrical passage;
ii. a second radially extending member including a second surface extending substantially perpendicular to an outer surface of the collet member;
and
iii. a passage having a first length;
c. a biasing member having a first end and a second end, the biasing member located in the first generally cylindrical passage and biasing the collet member in a first rotational direction;
d. a lock member having a second length, the lock member aligned in the passage of the collet member and extending radially inward beyond the inner surface of the collet member, the second length of the lock member being greater than the first length of the passage of the collet member wherein the collet member limits the lock member and retains the lock member within the first generally cylindrical passage of the main body;
and
e. an actuator radially movable in the second radially extending passage of the main body, the actuator including a second surface for engaging the first surface of the first radially extending member of the collet member wherein radially inward movement of the actuator against the force of the biasing member rotates the collet member within the first generally cylindrical passage and moves the lock member from a first locked position to a second unlocked position wherein the lock member is at least partially located in the radially and circumferentially extending channel of the main body.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/835,517Filed 15 Mar 2013
Priority: 29 Jun 2012
Published: 2 Jan 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

A61B 17/2909
Forceps for use in minimally invasive surgery: handles
A61B 17/00
Surgical instruments, devices or methods
A61B 17/32
Surgical instruments, devices or methods: surgical cutting instruments
A61B 17/32002
Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes: with continuously rotating, oscillating or reciprocating cutting instruments