ROTARY TOOL WITH IMPROVED COUPLING ASSEMBLY

• US 20150313612A1
• Filed: 04/30/2015
• Published: 11/05/2015
• 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
• Granted Patent: US 9,504,478 B2
• Time in Patent Office: 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 comprising a rotatable drive shaft;

a removable handle assembly adapter for connection to said handle assembly, said removable handle assembly adapter comprising a rotatable transmission shaft for connection to said rotatable drive shaft of said handle assembly; and

a removable nosepiece assembly for connection to said removable handle assembly adapter and for selectively securing the shaft of a working element to said rotatable transmission shaft of said removable handle assembly adapter;

wherein said removable handle assembly adapter and said removable nosepiece assembly each comprise a locking collar; and

wherein said removable handle assembly adapter and said handle assembly each comprise a connector assembly, said connector assembly comprising;

a housing comprising an opening;

a collet sleeve disposed within said opening and connected to an input shaft, said collet sleeve comprising a lumen for receiving an output shaft;

a locking element movable relative to said collet sleeve between (i) a locked position in which said output shaft is secured to said collet sleeve, and (ii) an unlocked position in which said output shaft is not secured to said collet sleeve; and

a cam element movable relative to said collet sleeve between (i) a first position in which said locking element is free to assume its said unlocked position, and (ii) a second position in which said cam element cams said locking element into said locked position;

such that movement of said locking collar causes said cam element to move between said first position and said second position;

wherein said housing comprises an L-shaped slot, and further wherein said locking collar comprises a follower for extending into said L-shaped slot;

wherein said L-shaped slot comprises a first leg and a second leg, and further wherein said first leg extends longitudinally along said housing and said second leg extends circumferentially along said housing;

wherein said follower is disposed in said first leg of said L-shaped slot when said locking collar is being mounted onto, or dismounted from, said housing, and further wherein said follower is disposed in said second leg of said L-shaped slot when said locking collar is rotated so as to cause said biasing collar to move said cam element into said second position.

2-9. -9. (canceled)

10. A surgical device comprising:

a handle assembly comprising a rotatable drive shaft;

a removable handle assembly adapter for connection to said handle assembly, said removable handle assembly adapter comprising a rotatable transmission shaft for connection to said rotatable drive shaft of said handle assembly; and

a removable nosepiece assembly for connection to said removable handle assembly adapter and for selectively securing the shaft of a working element to said rotatable transmission shaft of said removable handle assembly adapter;

wherein at least one of said removable handle assembly adapter and said removable nosepiece assembly comprises a removable locking collar; and

wherein at least one of said removable handle assembly adapter and said handle assembly comprises a connector assembly, said connector assembly comprising;

a housing comprising an opening and a canted slot;

a collet sleeve disposed within said opening and connected to an input shaft, said collet sleeve comprising a lumen for receiving an output shaft;

a locking element radially movable relative to said collet sleeve between (i) a locked position in which said output shaft is secured to said collet sleeve, and (ii) an unlocked position in which said output shaft is not secured to said collet sleeve;

a cam element longitudinally movable relative to said collet sleeve between (i) a first position in which said locking element is free to assume its said unlocked position, and (ii) a second position in which said cam element cams said locking element into said locked position, said cam element being yieldably biased into said second position;

a biasing collar for biasing said cam element into said first position; and

an element extending through said canted slot and secured to said biasing collar and said locking collar, such that rotation of said locking collar causes said element to move within said canted slot, whereby to cause said biasing collar to move said cam element between said second position and said first position.

11. A surgical device according to claim 10 wherein said handle assembly comprises said connector assembly, and further wherein said rotatable drive shaft of said handle assembly comprises said input shaft, and said transmission shaft comprises said output shaft.

12. A surgical device according to claim 10 wherein said removable handle assembly adapter comprises said connector assembly, and further wherein said rotatable transmission shaft of said removable handle assembly adapter comprises said input shaft, and the shaft of a working element comprises said output shaft.

13. A surgical device according to claim 10 wherein said handle assembly adapter and said nosepiece assembly both comprise a said locking collar, and wherein said removable handle assembly adapter and said handle assembly both comprise a said connector assembly.

14. A surgical device according to claim 10 wherein said removable handle assembly adapter comprises a second rotatable transmission shaft for connection to the shaft of a working element;

wherein said rotatable transmission shaft and said second rotatable transmission shaft are rotationally connected.

15. A surgical device according to claim 14 wherein said rotatable transmission shaft and said second rotatable transmission shaft are connected by gears.

16. A surgical device according to claim 14 wherein the longitudinal axis of said second rotatable transmission shaft extends at an angle to the longitudinal axis of said rotatable transmission shaft.

17. A surgical device according to claim 14 wherein said second rotatable transmission shaft turns at the same speed as said rotatable transmission shaft.

18. A surgical device according to claim 10 further comprising a working element comprising a shaft.

19. A method for securing a replaceable bit to a surgical device, said method comprising:

providing a surgical device comprising;

a handpiece handle comprising a powered rotatable drive shaft;

a removable handpiece handle assembly adapter for connection to said handpiece handle assembly, said removable handpiece handle assembly adapter comprising a rotatable transmission shaft for connection to said powered rotatable drive shaft of said handpiece handle assembly; and

a removable coupling nosepiece assembly for connection to said removable handpiece handle assembly adapter and for selectively securing the shaft of a working element to said rotatable transmission shaft of said removable handpiece handle assembly adapter;

wherein at least one of said removable handle assembly adapter and said removable nosepiece assembly comprises a removable locking collar; and

wherein at least one of said removable handpiece handle assembly adapter and said handpiece handle assembly comprises a connector assembly, said connector assembly comprising;

a housing comprising an opening and a canted slot;

a collet sleeve disposed within said opening and connected to an input shaft, said collet sleeve comprising a lumen for receiving an output shaft;

a locking element radially movable relative to said collet sleeve between (i) a locked position in which the said output shaft is secured to said collet sleeve, and (ii) an unlocked position in which the said output shaft is not secured to said collet sleeve;

a cam element longitudinally movable relative to said collet sleeve between (i) a first position in which said locking element is free to assume its said unlocked position, and (ii) a second position in which said cam element cams said locking element into said locked position, said cam element being yieldably biased into said second position;

a biasing collar for biasing said cam element into said first position;

a locking collar removably mounted to said housing; and

an element extending through said helical canted slot and secured to said biasing collar and said locking collar, such that rotation of said locking collar causes said element to move within said helical canted slot, whereby to cause said biasing collar to move said cam element into said first position;

rotating said locking collar so as to cause said biasing collar to move said cam element into said first position;

positioning a shaft in said lumen of said collet sleeve; and

rotating said locking collar so as to cause said biasing collar to move within said housing so as to allow said cam element to assume its second position.