US 2004/0092991 A1 · Surgical tool system with quick release coupling assembly

Abstract

A surgical tool system with a handpiece and a cutting accessory that has inner and outer hubs. The handpiece has a spring biased lock ring that abuts a complementary stop member integral with the accessory outer hub to hold the accessory to the handpiece. An RFID chip is disposed against an inner wall of the accessory outer hub. An elastomeric seal pressed against the inner wall of the accessory outer hub provides environmental protection for the RFID chip. The seal has a rib that extends around the outer perimeter of the proximal end of the outer hub so as to form a seal between the accessory and an adjacent inner wall of the handpiece. Stop tabs extend inwardly from the seal to prevent the drive hub disposed inside the outer hub from falling out.

Claims32

Dependent claims

A powered surgical handpiece comprising:

a housing having a distal end with an accessory opening dimensioned to receive the proximal end of a cutting accessory and a lock slot contiguous with the accessory opening dimensioned to receive a first lock tab that extends outwardly from the proximal end of the cutting accessory;
a power generating unit disposed within said housing for actuating the cutting accessory, said power generating unit including a coupling member for transferring power generated by said power generating unit to the cutting accessory;
a lock ring slidably fitted in the distal end of said housing so as to surround the accessory opening and the lock slot;
a biasing member disposed between said housing and said lock ring for holding said lock ring in a locked state wherein a section of said lock ring is disposed in the handpiece lock slot;
and
a release button integral with said lock ring that is depressed to slide said lock ring from the locked state to a release state in which said lock ring is clear of the lock slot.

3 more elements

A powered surgical tool comprising:

a handpiece, said handpiece having a distal end and an accessory opening that extends inwardly from the distal end that is dimensioned to receive an outer hub of a cutting accessory;
a motor disposed in said handpiece body, said motor having a rotating output shaft and a coupling member attached to said output shaft for releasably coupling a drive hub of the cutting accessory to said output shaft so that said output shaft and said drive hub rotate in unison;
a coupling assembly attached to said handpiece body for releasably holding the cutting accessory outer hub to said handpiece body, said coupling assembly comprising:
a handpiece being formed to define a lock slot that extends longitudinally inwardly from the distal end that is contiguous with the accessory opening, the lock slot being dimensioned to receive a first lock tab that extends from an outer surface of the cutting accessory out hub;
a lock ring mounted to said handpiece, said lock ring positioned to surround the accessory opening and the lock slot, said lock ring being slidably mounted to said handpiece and positioned to selectively intersect the lock slot;
a biasing member disposed between said handpiece and said lock ring for urging said lock ring into a locked state in which a section of said lock ring intersects the lock slot;
and
a release button integral with said lock ring that is depressed to slide said lock ring from the locked state to a release state wherein said lock ring is spaced from the lock slot.

5 more elements

A cutting accessory comprising:

a drive hub, said drive hub having:
a neck with a diameter, said neck having attached thereto a geometric feature for coupling said drive hub to a handpiece motor;
and a head integral with and located at the distal end of said neck, said neck having a diameter, the diameter of said head being greater than the diameter of said neck;
a drive shaft connected to said drive hub head that extends forward of said drive hub;
an outer hub at least partially disposed over said drive hub, said outer hub having:
a base having an inner wall that defines a proximal end opening, said drive hub head and at least a portion of said drive hub neck being disposed in the proximal end opening;
and a head integral with and disposed over said base, said head having a bore through which said drive shaft extends;
at least one stop member formed of material that yields upon application of pressure, that extends inwardly from the inner wall of said outer hub base, said at least one stop member defining an open section within the outer hub base proximal end opening that has a diameter greater than the diameter of said drive hub neck and less than the diameter of said drive hub head, said stop member being positioned in said outer hub base so that the open section defined by said stop member subtends a portion of said drive hub neck;
and
an outer housing that extends forward from said outer hub head that at least partially surrounds said drive shaft.

7 more elements

A cutting accessory for actuation by a powered surgical handpiece, said cutting accessory comprising:

a drive hub, said drive hub formed with at least one geometric feature for causing said drive hub to engage an output shaft of a handpiece motor;
a drive shaft that extends forward from said drive hub;
an outer hub disposed over said drive hub, said outer hub having:
a base that has an inner wall that defines an outer hub proximal end opening, said drive hub being at least partially seated in the outer hub proximal end opening;
and a head disposed over said base, said head having a bore through which said drive shaft extends;
a seal formed of flexible material located adjacent the inner wall of said outer hub base, said seal shaped to have:
a first and second longitudinally spaced apart end sections, each said end section abutting and circumferentially surrounding the inner wall of said outer hub base;
a main section that extends between said end sections, said main section having an outer surface that is spaced inwardly relative to said end sections so that the main section has an outer surface that is spaced inwardly of the inner wall of said outer hub base;
an RFID chip and coil assembly disposed between the inner wall of said outer hub base, said seal main section and said seal end sections;
and
an outer housing that extends forward from said outer hub head and that at least partially surrounds said drive shaft.

8 more elements

Dependencies are inferred from the claim text.

Surgical tool system with quick release coupling assembly

Life of this patent

Surgical tool system with quick release coupling assembly

Life of this patent

Abstract

Claims32