Blade retention mechanism for surgical instrument

Patent metadata

Field	Value
Publication number	US-9827001-B2
Application number	US-201614989939-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Jun 29, 2012
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A surgical apparatus which includes a handpiece having a passage. The retention assembly includes a pair of radially movable buttons, aligned in axially extending passages in communication with the passage and can engage with and cause rotational movement of a collet member assembly rotatably supported in the passage. The collet assembly includes rolling lock members which can be moved by the collet member from a lock position, in which the lock members are forced by the wall of the passage to extend inwardly of the collet member and an 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. The surgical apparatus may find particular use with irrigation fluid, suction, and powering of a surgical tool. The passage may include a cutting blade retention assembly integrated in the passage.

First claim

The invention claimed is:

1. A surgical apparatus including:
a) a handpiece having a passage adapted for receiving a surgical tool; and
b) a retention assembly integrated into the handpiece, the retention assembly including:
(i) a collet assembly including:
a collet member having a first inclined surface; and
a biasing member;

(ii) two buttons having a supplementary inclined surface supplementary with the first inclined surface of the collet member;
wherein radial movement of the two buttons relative to an insertion direction of the surgical tool into the passage causes rotational movement of the collet member by interaction between the first inclined surface and the supplementary inclined surface so that the collet assembly moves from a locked position to an unlocked position too uncouple or allow insertion of the surgical tool from the surgical apparatus; and
wherein releasing the two buttons results in the biasing member moving the collet assembly from the unlocked position to the locked position so that the retention assembly selectively retains the surgical too in the surgical apparatus.

2. The surgical apparatus of claim 1 , wherein the first inclined surface has a non-flat portion surface.

3. The surgical apparatus of claim 2 , wherein the non-flat portion surface has an approximately 8 degree angle.

4. A method comprising the steps of:
(i) pressing two buttons, which are included in a retention assembly of a surgical apparatus, so that the two buttons move radially inward relative to an insertion direction of a disposable surgical instrument and the radially inward movement transfers into rotational movement of a collet member, which is included in a collet assembly of the retention assembly, by interaction between a button surface and a supplementary collet member surface so the collet assembly moves from a locked position to an unlocked position to allow for insertion of the disposable surgical instrument into the surgical apparatus;
(ii) inserting the disposable surgical instrument into a passage in a handpiece of the surgical apparatus;
(iii) releasing the two buttons so that a biasing member moves the collet assembly from the unlocked position to the locked position which retains the disposable surgical instrument to the surgical apparatus.

5. The method according to claim 4 , wherein the collet assembly includes a plurality of lock members and the biasing member; and
wherein the collet assembly is biased toward the locked position by a biasing force of the biasing member.

6. The method according to claim 5 , wherein upon releasing the two buttons, the biasing force rotates the collet member which moves the plurality of lock members so that the collet assembly moves from the unlocked position to the locked position.

7. The method according to claim 6 , wherein releasing the two buttons forces the plurality of lock members to move radially inwardly into a plurality of holes of the collet member.

8. The method according to claim 7 , wherein releasing the two buttons moves the plurality of lock members so that a portion of the plurality of lock members projects into an annular recess in the disposable surgical instrument and prevents the disposable surgical instrument from being removed from the handpiece.

9. The method according to claim 8 , wherein the disposable surgical instrument is inserted into the passage in the unlocked position; and
the collet assembly is rotatably supported in the passage.

10. The method according to claim 9 , wherein the retention assembly is integrated into the handpiece.

11. A method comprising the steps of:
(i) pressing two buttons, which are included in a retention assembly of a surgical apparatus, so that the two buttons move radially inward relative to an insertion direction of a disposable surgical instrument and the radially inward movement transfers into rotational movement of a collet member, which is part of a collet assembly of the retention assembly, through interaction between a button surface and a supplementary collet member surface so the collet assembly rotates to move a plurality of lock members from a locked position to an unlocked position to selectively retain or remove the disposable surgical instrument to the surgical apparatus;
(ii) inserting the disposable surgical instrument into a passage in a handpiece of the surgical apparatus;
(iii) releasing the two buttons so a biasing member rotates the collet assembly to move the plurality of lock members from the unlocked position to the locked position;
(iv) using the disposable surgical instrument while assembled to the surgical apparatus; and
(v) removing the disposable surgical instrument from the passage in the handpiece.

12. The method according to claim 11 , wherein the biasing member is part of the collet assembly and a biasing force of the biasing member biases the collet assembly toward the locked position; and
wherein a force of pressing the two buttons to transfer the radially inward movement into the rotational movement overcomes the biasing force.

13. The method according to claim 12 , wherein the plurality of lock members are part of the collet assembly; and
wherein upon releasing the two buttons, the biasing force rotates the collet member which moves the plurality of lock members so that the collet assembly moves from the unlocked position to the locked position.

14. The method according to claim 11 , wherein the passage includes a plurality of recesses having recess ends; and
wherein the step of moving the plurality of lock members from the unlocked position to the locked position moves the plurality of lock members towards the recess ends.

15. The method according to claim 14 , wherein the plurality of lock members move towards the recess ends until a wall of the passage moves the plurality of lock members radially inward into a plurality of holes in the collet member.

16. The method according to claim 15 , wherein the plurality of lock members have a lock member length and the plurality of holes have a hole length; and
the lock members move radially inward in the plurality of holes until the lock member length interferes with the hole length and a portion of the plurality of lock members projects into an annular recess of the disposable surgical instrument.

17. The method according to claim 16 , wherein the portion of the plurality of lock members which projects into the annular recess prevents the disposable surgical instrument from being removed from the handpiece.

18. The method according to claim 17 , wherein the disposable surgical instrument is retained in the handpiece until the plurality of lock members move from the locked position to the unlocked position.

19. The method according to claim 18 , wherein the disposable surgical instrument is inserted into the passage in the unlocked position.

20. The method according to claim 19 , wherein the retention assembly is integrated into the handpiece.

Assignees

• Gyrus Acmi Inc

Inventors

• Casey Jay A
• Edwards Kevin C
• Matusaitis Tomas

Classifications

• Y10T279/17717

  Rotary eccentric-cam sleeve · CPC title

• A61B17/00 Primary

  Surgical instruments, devices or methods (A61B18/00 takes precedence; dental tools A61C3/00; eye surgery A61F9/007; ear surgery A61F11/20) · CPC title

• A61B17/32

  Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133}) · CPC title

• B23B31/1071

  Retention by balls (balls acting as jaws B23B31/22) · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title