Surgical tool system with quick release coupling assembly

Patent metadata

Field	Value
Publication number	US-9955993-B2
Application number	US-201313940913-A
Country	US
Kind code	B2
Filing date	Jul 12, 2013
Priority date	Aug 8, 2002
Publication date	May 1, 2018
Grant date	May 1, 2018

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.

First claim

The invention claimed is:

1. A cutting accessory configured to be engaged with a powered surgical handpiece, the cutting accessory comprising:
an outer hub configured to be received within the powered surgical handpiece and remain stationary relative thereto when received within the powered surgical handpiece, the outer hub including a tubular base and a tubular shell;
the tubular base has a receiving end and a shell end;
the tubular shell extends from the shell end of the tubular base and has a first end at the shell end of the tubular base and a second end extending away from the shell end of the tubular base;
the outer hub has an opening therein extending from the second end of the tubular shell to the receiving end of the tubular base, with the second end of the tubular shell having a hole therein;
the tubular base includes two tapering ramps extending radially from an outside surface thereof, the tapering ramps being fixed in position relative to the outside surface and a remainder of the tubular base, the tapering ramps being configured to hold the cutting accessory within the powered surgical handpiece when the outer hub is received within the powered surgical handpiece; and
a drive hub assembly configured to be received within the receiving end of the tubular base of the outer hub, the drive hub assembly being configured to rotate relative to the outer hub when received within the tubular base of the outer hub, the drive hub assembly including a drive hub and a tubular shaft;
the drive hub includes a driven end and a shaft end;
the tubular shaft extends from the shaft end of the drive hub and has a first end connected to the drive hub and a second end extending away from the drive hub, with the second end of the tubular shaft having a cutting head; and
the drive hub assembly including a fluid path therethrough from an end hole adjacent the cutting head of the tubular shaft, through the tubular shaft, through the drive hub and to and out a side hole in the drive hub, thereby allowing fluid to travel through the hole at the second end of the tubular shell of the outer hub and through the fluid path of the drive hub assembly to exit through the side hole in the drive hub.

2. The cutting accessory of claim 1 , wherein:
the drive hub includes a slot in the driven end thereof, the slot configured to receive a shaft of the powered surgical handpiece for rotating the drive hub.

3. The cutting accessory of claim 2 , wherein:
the drive hub includes a spring in the driven end thereof, the spring being configured to press against the shaft of the powered surgical handpiece when the cutting accessory is connected to the powered surgical handpiece.

4. The cutting accessory of claim 1 , wherein:
each of the tapering ramps includes a planar surface at a larger end thereof extending radially from an outer surface of the tapering ramp to an outer surface of the tubular base, the planar surfaces of the tapering ramps being co-planar.

5. The cutting accessory of claim 4 , wherein:
the outer surfaces of the tapering ramps are curved.

6. The cutting accessory of claim 4 , wherein:
each of the tapering ramps include the planar surface at a first end of the outer surface and a short radially extending surface at a second end of the outer surface, with the short radially extending surface extending between the second end of the outer surface and the outer surface of the tubular base.

7. The cutting accessory of claim 2 , wherein:
the drive hub includes a tubular stem, a tubular neck and a tubular head, with the tubular neck being located between the tubular stem and the tubular head, the tubular neck having a smaller diameter than the tubular stem and the tubular head.

8. The cutting accessory of claim 7 , wherein:
the side hole in the drive hub extends through the tubular neck.

9. The cutting accessory of claim 8 , wherein:
the tubular stem of the drive hub includes a slot in the driven end thereof, the slot configured to receive a shaft of the powered surgical handpiece for rotating the drive hub.

10. The cutting accessory of claim 2 , wherein:
the tubular shell is substantially straight.

11. The cutting accessory of claim 2 , wherein:
the two tapering ramps are located on diametrically opposed areas of the tubular base.

12. A powered surgical handpiece assembly comprising:
the cutting accessory of claim 1 , the cutting accessory having a proximal end; and
a handpiece comprising:
a housing having a distal end defining a non-rotatable accessory coupling arrangement, the distal end having an accessory opening dimensioned to receive the proximal end of the cutting accessory, a lock slot contiguous with the accessory opening dimensioned to receive a lock tab that extends outwardly from the proximal end of the cutting accessory, and a groove that intersects the lock slot and opens into the accessory opening;
a power generating unit disposed within the housing for actuating the cutting accessory, the power generating unit including a coupling member for transferring power generated by the power generating unit to the cutting accessory;
a lock ring fitted in the distal end of the housing so as to surround the accessory opening and the lock slot, the groove accommodating a section of the lock ring that is disposed in the lock slot, wherein the groove and the lock slot each have a depth, the depth of the groove being greater than the depth of the lock slot, the lock ring and the distal end of the housing collectively dimensioned so that when the lock ring is moved to a release state, the lock ring seats in a portion of the groove below the lock slot;
a release button integral with the lock ring that is depressed to move the lock ring from a locked state to the release state in which the lock ring is clear of the lock slot;
a biasing member disposed between an outer surface of the distal end of the housing and the lock ring or the release button so as to bias the lock ring so that the release button is urged away from the distal end of the housing to hold the lock ring in the locked state wherein a section of the lock ring is disposed in the lock slot; and
a cover plate fitted over the lock ring and secured to the distal end of the housing to hold the lock ring thereto.

13. The powered surgical handpiece assembly of claim 12 , wherein:
the housing includes a body and a collet that is attached to an end of the body to define the distal end of the housing.

14. A powered surgical handpiece assembly comprising:
the cutting accessory of claim 1 , the cutting accessory having a proximal end; and
a handpiece comprising:
a housing having a distal end with an accessory opening dimensioned to receive the proximal end of the 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, the housing including an auxiliary slot separate from the lock slot that opens into the accessory opening for receiving a second lock tab that extends outwardly from the proximal end of the cutting accessory;
a power generating unit disposed within the housing for actuating the cutting accessory, the power generating unit including a coupling member for transferring power generated by the power generating unit to the cutting accessory;
a lock ring movably fitted in the distal end of the housing so as to surround the accessory opening and the lock slot;
a biasing member disposed between the housing and the lock ring for holding the lock ring in a locked state wherein a section of the lock ring is disposed in the lock slot; a

Assignees

• Deng Wenjie
• Stryker Corp

Inventors

• Deng Wenjie

Classifications

• A61B2017/00482

  with a code · CPC title

• A61B17/32002 Primary

  with continuously rotating, oscillating or reciprocating cutting instruments · CPC title

• A61B90/98

  using electromagnetic means, e.g. transponders · CPC title

• Y10T279/17829

  U-clamp · CPC title

• Y10T279/17786

  Spring · CPC title