Rotary tool with improved coupling assembly

Patent metadata

Field	Value
Publication number	US-9504478-B2
Application number	US-201514700336-A
Country	US
Kind code	B2
Filing date	Apr 30, 2015
Priority date	Apr 30, 2014
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A surgical device comprising a handle assembly comprising a drive shaft; a handle assembly adapter for connection to the handle assembly comprising a transmission shaft for connection to the drive shaft; and a nosepiece assembly for connection to the adapter and for securing the shaft of a working element to the transmission shaft; wherein the adapter and the nosepiece assembly each comprise a locking collar; wherein the adapter and the handle assembly each comprise a connector assembly comprising a housing comprising an opening; a collet sleeve disposed within the opening, connected to an input shaft, and comprising a lumen for receiving an output shaft; a locking element for locking and unlocking the output shaft to the collet sleeve; and a cam element movable between first and second positions such that movement of the locking collar causes the cam element to move between the first position and the second position.

First claim

What is claimed is:

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. 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.

3. A surgical device according to claim 2 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.

4. A surgical device according to claim 2 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.

5. A surgical device according to claim 2 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.

6. A surgical device according to claim 2 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.

7. A surgical device according to claim 6 wherein said rotatable transmission shaft and said second rotatable transmission shaft are connected by gears.

8. A surgical device according to claim 6 wherein the longitudinal axis of said second rotatable transmission shaft extends at an angle to the longitudinal axis of said rotatable transmission shaft.

9. A surgical device according to claim 6 wherein said second rotatable transmission shaft turns at the same speed as said rotatable transmission shaft.

10. A surgical device according to claim 2 further comprising a working element comprising a shaft.

11. 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 rela

Assignees

• Gyrus Acmi Inc
• Gyrus Acmi Inc

Inventors

• Edwards Kevin C
• Casey Jay A
• Wong Peter Y
• Conrad Jesse

Classifications

• B23B2270/16

  Constructions comprising three or more similar components · CPC title

• B23B2231/0268

  Radial grooves · CPC title

• B23B31/1071

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

• B23B31/005

  Cylindrical shanks of tools · CPC title

• A61B17/16 Primary

  Instruments for performing osteoclasis; Drills or chisels for bones; Trepans {(arthroscopic bone cutters A61B17/320016)} · CPC title