Fastener holding tool and system

• US 6,220,122 B1
• Filed: 10/20/1999
• Issued: 04/24/2001
• Est. Priority Date: 10/20/1999
• Status: Expired due to Term

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Illinois Tool Works Inc.
• Inventors: Forsell, David J., Yates, Edward Douglas
• Primary Examiner(s): MEISLIN, DEBRA S
• Application Number:
  US09/421,301
• Time in Patent Office: 552 Days
• Field of Search: 81/44, 814/87, 81/64, 81/34, 81/531, 81/531.1, 81/531.2, 227/147, 279/102
• US Class Current: 81/44
• CPC Class Codes: B25C 3/006 only for holding and guiding
• CPC Class Codes: Y10T 279/17957 Friction grip

Abstract

A fastener driving system and a fastener holding tool therefor having a shank and a resilient retainer with a bore therethrough coupled to a first end portion of the shank. A first end of the resilient retainer and a portion of the resilient retainer bore protrudes axially beyond the first end of the shank. In some embodiments, an annular chamfer is disposed on the resilient retainer between a first end and the bore thereof. The system includes a fastener having a shaft with a head formed on a trailing end portion thereof. The fastener head diameter is greater than the retainer bore diameter of the resilient retainer protruding axially beyond the first end of the shank to engage and retain the fastener.

Claims

1. An axial impact fastener holding tool comprising:

a shank having a first end portion with a first end and an opposite driving end portion, a portion of the first end portion having a first shank diameter, the shank having an annular shoulder disposed about the first end portion thereof and a plurality of annular ribs disposed about the first end portion;

a resilient retainer having a first end portion with a first end and a second end portion with a second end, the resilient retainer having a bore through the first and second ends thereof at least a portion of the bore having a retainer bore diameter less than the shank first end portion diameter prior to insertion of the shank therein, the first end portion of the shank being disposed in the bore at the second end of the resilient retainer and engaged therewith;

the bore having an annular chamfer at the first end portion of the resilient retainer,

the second end portion of the resilient retainer coupled to the first end portion of the shank and fixed relative thereto, the second end of the resilient retainer abutting the shoulder at the first end portion of the shank, the shank ribs disposed in and engaged with the resilient retainer,

the first end of the resilient retainer and a non-chamfered portion of the bore thereof protruding axially beyond the first end of the shank.

2. The tool of claim 1, the first end of the shank having a fastener head accommodating configuration.

3. An axial impact fastener driving system comprising:

a fastener holding tool having a shank with a first end portion and a driving end portion opposite the first end portion thereof, the first end portion of the shank having a first end having a generally concave surface;

the fastener holding tool having a resilient retainer with a bore therethrough, the resilient retainer coupled to the first end portion of the shank, the resilient retainer having a first end portion with a first end,

the first end of the resilient retainer protruding axially beyond the first end of the shank, a portion of the resilient retainer bore protruding axially beyond the first end of the shank having a retainer bore diameter;

a fastener having a shaft with a head formed on a trailing end portion thereof, the fastener head having an axial dimension and a head diameter the head having a top end having a generally convex surface,

the axial dimension of the fastener head being not less than the axial dimension between the first end of the shank and the first end of the resilient retainer,

the head diameter being greater than the retainer bore diameter prior to insertion of the fastener head into the bore from the first end of the resilient retainer,

whereby the fastener is retained by the resilient retainer upon insertion of the fastener head into the bore of the resilient retainer.

4. The system of claim 3, the axial dimension of the fastener head being greater than the axial dimension between the first end of the shank and the first end of the resilient retainer.

5. The system of claim 3, the fastener head having a cylindrical side portion.

6. The system of claim 3 the resilient retainer having a second end portion with a second end, the bore of the resilient retainer extending through the second end thereof, the first end portion of the shank having a first shank diameter, the first end of the shank being disposed in the bore at the second end of the resilient retainer, at least a portion of the bore of the resilient retainer having a retainer bore diameter less than the first shank diameter prior to the insertion of the first end portion of the shank therein, the second end of the resilient retainer fixed axially relative to the shank.

7. The system of claim 6, a retainer engagement member disposed about the first end portion of the shank, the retainer engagement member of the shank disposed in the bore of the resilient retainer from the second end of the resilient retainer and engaged with the bore thereof.

8. The system of claim 6, an annular rib disposed about the first end portion of the shank and formed unitarily therewith, the annular rib disposed in the bore of the resilient retainer and engaged therewith.

9. The system of claim 6, an annular shoulder disposed about the first end portion of the shank, the second end of the resilient retainer abuts against the shoulder of the shank.

10. The system of claim 3, the head diameter of the fastener being greater than a shaft diameter thereof, the fastener head having a cylindrical side portion.