Spring-loaded threaded fastener holder

• US 6,857,343 B1
• Filed: 09/30/2003
• Issued: 02/22/2005
• Est. Priority Date: 09/30/2003
• Status: Expired due to Fees

• Current Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Original Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Inventors: Correia, Jose, Mendes, Amadeu, Easterbrooks, Christina
• Primary Examiner(s): Meislin, Debra S.
• Application Number:
  US10/674,561
• Time in Patent Office: 511 Days
• Field of Search: 81451-458, 606/104
• US Class Current: 81/452
• CPC Class Codes: B25B 23/101 for hand-driven screw-drivers B25B23/105 takes precedence

Abstract

A threaded fastener holder holds a screw in place and then automatically disengages from the screw and withdraws axially in the proximal direction to permit the user to continue inserting the screw without interruption. The threaded fastener holder has a shaft having a distal end for selectively engaging with a head of a threaded fastener. An inner sleeve surrounds at least a portion of the shaft, and is axially movable with respect to the shaft. The inner sleeve has a plurality of spring fingers disposed at its distal end, each of which has a distal end that is radially movable so as to be selectively engageable with the head of the threaded fastener. A first end of a spring is fixed with respect to the inner sleeve. The second end of the spring is fixed with respect to the shaft. In the rest position, the distal end of the plurality of spring fingers is axially spaced from the distal end of the shaft.

Claims

1. A threaded fastener holder comprising:

a shaft having a distal end for selectively engaging with a head of a threaded fastener, and a proximal end;

a handle being connected to said proximal end of said shaft;

an inner sleeve surrounding at least a portion of said shaft, said inner sleeve being axially movable with respect to said shaft, said inner sleeve having a plurality of spring fingers disposed at a distal end of said inner sleeve, said plurality of spring fingers each having a distal end that are radially movable so as to be selectively engageable with the head of a threaded fastener; and

a spring having a first end and a second end, said first end of said spring being fixed with respect to said inner sleeve, said second end of said spring being fixed with respect to said shaft, wherein, in said rest position, said distal end of said plurality of spring fingers is axially spaced from said distal end of said shaft.

2. The fastener holder according to claim 1, wherein said inner sleeve has an enlarged head disposed at a proximal end of said inner sleeve.

3. The fastener holder according to claim 2, wherein said first end of said inner sleeve is fixedly connected to said enlarged head.

4. The fastener holder according to claim 1, further comprising a nut being fixedly connected to said handle.

5. The fastener holder according to claim 4, further comprising an out er sleeve being fixedly connected to said nut.

6. The fastener holder according to claim 5, wherein said outer sleeve surrounds at least a portion of said inner sleeve.

7. The fastener holder according to claim 6, further comprising an end cap being fixedly connected to said outer sleeve.

8. The fastener holder according to claim 7, wherein said outer sleeve has a proximal end and a distal end, said end cap being fixedly connected to said distal end of said outer sleeve.

9. The fastener holder according to claim 8, wherein said second end of said spring is fixedly connected to said end cap.

10. The fastener holder according to claim 9, wherein said inner sleeve has an enlarged head disposed at a proximal end of said inner sleeve.

11. A method of inserting a threaded fastener into bone with a threaded fastener holder having a shaft having a distal end for selectively engaging with a head of a threaded fastener, and a proximal end;

a handle being connected to said proximal end of said shaft;

an inner sleeve surrounding at least a portion of said shaft, said inner sleeve being axially movable with respect to said shaft, said inner sleeve having a plurality of spring fingers disposed at a distal end of said inner sleeve, said plurality of spring fingers each having a distal end that are radially movable so as to be selectively engageable with the head of a threaded fastener; and

a spring having a first end and a second end, said first end of said spring being fixed with respect to said inner sleeve, said second end of said spring being fixed with respect to said shaft, wherein, in said rest position, said distal end of said plurality of spring fingers is axially spaced from said distal end of said shaft,

said method comprising the steps of;

sliding said plurality of fingers axially in the distal direction;

connecting the head of a threaded fastener to said plurality of fingers;

inserting the threaded fastener into a bone;

automatically disengaging the plurality of hinges from the head of the threaded fastener, thereby causing said inner sleeve to move axially in the proximal direction.