Fastening tool for screw threaded bolts

Details Fastening tool for screw threaded bolts Fastening tool for screw threaded bolts

2007-07-03

2007-07-03

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S176150, C081S461000

Reexamination Certificate

active

10561890

ABSTRACT:
Provided according to the invention is a fastening tool (10) for tightening/untightening screw threaded fasteners such as bolts or nuts (18). The bolts (18) comprise a head formed with a series of at least three cavities (18a) deployed therearound. The fastening tool (10) comprises at least three peanut-shaped displaceable locking bodies (16) having spherical portions (16a; 16b), and a restricted neck portion (16c) therebetween. The cavities (18a) of the bolt (18) are configured to receive the spherical portions (16b). A seat member (12) is provided, formed with a series of at least three cavities (22) configured to receive the spherical portions (16a). Further provided is a manipulator (14) for rocking the locking bodies (16) about their neck portions (16c) from a non-operative position wherein the spherical portions (16a) are seated in the cavities (22), into an operative position wherein the spherical portions (16b) are seated in the bolt cavities (18a), and vice versa.

REFERENCES:
patent: 2860675 (1958-11-01), Kauffman
patent: 4302137 (1981-11-01), Hart
patent: RE33114 (1989-11-01), Chiavon
patent: 4938108 (1990-07-01), Mekler
patent: 5988023 (1999-11-01), Townsend et al.
patent: 6089396 (2000-07-01), Pozek
patent: 3924323 (1991-01-01), None

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