Rotary tool with improved coupling assembly

• US 9,414,848 B2
• Filed: 04/30/2015
• Issued: 08/16/2016
• Est. Priority Date: 04/30/2014
• Status: Active Grant

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Inventors: Edwards, Kevin C., Casey, Jay A., Wong, Peter Y., Conrad, Jesse
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US14/700,308
• Publication Number:
  US 20150313610A1
• Time in Patent Office: 474 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/16 Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans arthroscopic bone cutters A61B17/320016; dental implant drills potentially for other surgical use A61C8/0089; bone grinders A61F2/4644, A22C17/06; A61B17/1662 takes precedence over all other subgroups except A61B17/17
• CPC Class Codes: A61B 17/162 Chucks or tool parts which are to be held in a chuck
• CPC Class Codes: A61B 17/1622 Drill handpieces A61B17/1626, A61B17/1628 take precedence
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: A61B 17/1631 Special drive shafts, e.g. flexible shafts A61B17/1642, A61B17/164 take precedence
• CPC Class Codes: A61B 17/1633 Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft A61B17/1644 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: B23B 2231/0268 Radial grooves
• CPC Class Codes: B23B 2231/2078 Jaw carriers, i.e. components retaining the collet itself
• CPC Class Codes: B23B 2270/16 Constructions comprising three or more similar components
• CPC Class Codes: B23B 31/005 Cylindrical shanks of tools
• CPC Class Codes: B23B 31/1071 Retention by balls balls acting as jaws B23B31/22

Abstract

A surgical device comprising: a handle assembly; a locking collar; and a set of replaceable bits that load along an axis into the handle assembly; wherein the locking collar is fully removable from the handle assembly, the locking collar loads axially to a first position, and the locking collar rotates between the first position and a second position; wherein, in the first position, the locking collar is free to be axially removed from the handle assembly and the replaceable bits are free to be loaded or unloaded from the handle assembly; wherein, in the second position, the locking collar is prevented from axial movement relative to the handle assembly and the replaceable bits are prevented from being received within, or removed from, the handle assembly; and the locking collar is guided to the first position and between the first position and the second position by a groove in the handle assembly mating with a member carried by the locking collar. And a surgical device comprising: a handle assembly comprising a rotatable drive shaft; a removable handle assembly adapter for connection to the handle assembly, the removable handle assembly adapter comprising a rotatable transmission shaft for connection to the rotatable drive shaft of the handle assembly; and a removable nosepiece assembly for connection to the removable handle assembly adapter and for selectively securing the shaft of a working element to the rotatable transmission shaft of the removable handle assembly adapter; wherein the removable handle assembly adapter and the removable nosepiece assembly each comprise a locking collar; and wherein the removable handle assembly adapter and the handle assembly each comprise a connector assembly, the connector assembly comprising: a housing comprising an opening; a collet sleeve disposed within the opening and connected to an input shaft, the collet sleeve comprising a lumen for receiving an output shaft; a locking element movable relative to the collet sleeve between (i) a locked position in which the output shaft is secured to the collet sleeve, and (ii) an unlocked position in which the output shaft is not secured to the collet sleeve; and a cam element movable relative to the collet sleeve between (i) a first position in which the locking element is free to assume its unlocked position, and (ii) a second position in which the cam element cams the locking element into the locked position; such that movement of the locking collar causes the cam element to move between the first position and the second position.

Claims

1. A surgical device comprising:

a handle assembly;

a locking collar; and

a set of replaceable bits that load along an axis into said handle assembly;

wherein said locking collar is fully removable from said handle assembly, said locking collar loads axially to a first position, and said locking collar rotates between said first position and a second position;

wherein, in said first position, said locking collar is free to be axially removed from said handle assembly and said replaceable bits are free to be loaded or unloaded from said handle assembly;

wherein, in said second position, said locking collar is prevented from axial movement relative to said handle assembly and said replaceable bits are prevented from being received within, or removed from, said handle assembly; and

said locking collar is guided to said first position and between said first position and said second position by a groove in said handle assembly mating with a member carried by said locking collar.

2. A surgical device according to claim 1 wherein said groove comprises an axial portion and a circumferential portion.

3. A surgical device according to claim 1 wherein, in said first position, said locking collar is biased to its first position by a biasing element.

4. A surgical device according to claim 3 wherein, in said second position, said locking collar is biased to its second position by said biasing element.

5. A surgical device according to claim 1 wherein, in said first position, said locking collar is biased to its first position by a biasing element, and further wherein, in said second position, said locking collar is biased to its second position by said biasing element.

6. A surgical device according to claim 5 wherein said handle assembly comprises:

a cylindrical housing portion upon which said locking collar is received;

a cam slot formed in said cylindrical housing portion;

a biasing collar that rides on an inner bore of said cylindrical housing portion;

at least one biasing collar engagement element that is secured to said biasing collar, extends through said cam slot, and engages with said locking collar; and

a biasing collar biasing element;

wherein said cam slot has a first portion that is canted such that rotating said locking collar away from said first position drives said biasing collar engagement element through said cam slot and drives said biasing collar against said biasing element, and a second portion that is canted such that rotating said locking collar away from said second position drives said biasing collar engagement element through said cam slot and drives said biasing collar against said biasing element.

7. A surgical device comprising:

a handle assembly, said handle assembly comprising;

a collet sleeve, said collet sleeve comprising at least one opening extending radially through said collet sleeve;

a hollow housing;

at least one canted cam slot formed in said hollow housing, said at least one canted cam slot having a first end and a second end;

a biasing collar, said biasing collar comprising at least one biasing collar engagement element, said at least one biasing collar engagement element extending through said at least one canted cam slot and extending outwardly from the outer surface of said hollow housing, said biasing collar being configured to move between a first biasing collar position and a second biasing collar position;

a cam element, said cam element being configured to move between a first cam element position and a second cam element position;

a biasing element, said biasing element biasing said cam element towards said second cam element position; and

at least one locking element, said at least one locking element being configured to move in said at least one opening in said collet sleeve; and

a locking collar, wherein said locking collar is fully removable from said handle assembly, and further wherein said locking collar is configured to directly engage the portion of said at least one biasing collar engagement element which extends outwardly from the outer surface of said hollow housing and is configured to rotate between a first locking collar position and a second locking collar position;

wherein, when said locking collar is in its first locking collar position, said at least one biasing collar engagement element is engaged with said locking collar and is driven to said first end of said at least one canted cam slot, causing said biasing collar to be driven to said first biasing collar position, in which position said biasing collar urges said cam element to said first cam element position, and further wherein, with said cam element in said first cam element position, said at least one locking element is free to move radially outward in said at least one opening of said collet sleeve; and

wherein rotation of said locking collar from said first locking collar position to said second locking collar position causes said at least one biasing collar engagement element to be driven to said second end of said at least one canted cam slot, and said biasing collar is driven to said second biasing collar position, such that said biasing collar is retracted beyond the travel of said cam element, allowing said biasing element to drive said cam element to its said second cam element position, in which position said at least one locking element is driven into said at least one opening in said collet sleeve so that a portion of said at least one locking element extends radially inward from the inner wall of said collet sleeve.

8. A surgical device according to claim 7 wherein said collet sleeve is configured to receive the shaft of a working element.

9. A surgical device according to claim 8 wherein the shaft of a working element can be received within said collet sleeve, or removed from said collet sleeve, when said cam element is in said first cam element position.

10. A surgical device according to claim 8 wherein said collet sleeve is configured to lock a working element within said collet sleeve when said cam element is in said second cam element position.

11. A surgical device according to claim 8 wherein said collet sleeve is configured to block insertion of a working element into said collet sleeve when said cam element is in said second cam element position.

12. A surgical device according to claim 7 wherein said at least one locking element is free to move radially outward in said at least one opening of said collet sleeve to contact said cam element when said cam element is in said first cam element position.

13. A surgical device according to claim 7 wherein said hollow housing is configured to receive said locking collar thereon.

14. A surgical device according to claim 7 wherein said at least one biasing collar engagement element comprises a pin.

15. A surgical device according to claim 7 wherein said at least one biasing collar engagement element comprises a ball.

16. A surgical device according to claim 7 wherein said first cam element position is distal and said second cam element position is proximal.

17. A surgical device according to claim 7 wherein said biasing element comprises a spring.

18. A surgical device according to claim 7 wherein said at least one locking element comprises a ball.

19. A surgical device according to claim 7 wherein said biasing collar directly engages said cam element when said biasing collar is in its first biasing collar position.

20. A surgical device according to claim 7 wherein said biasing collar does not engage said cam element when said biasing collar is in its second biasing collar position.

21. A surgical device according to claim 7 wherein said at least one biasing collar engagement element is received in a groove formed in said locking collar.