Security nut and tool associated therewith

Details Security nut and tool associated therewith Security nut and tool associated therewith

2007-05-22

2007-05-22

Meislin, D. S. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

C081S121100

Reexamination Certificate

active

11386553

ABSTRACT:
A tool for tightening and loosening a security nut and the security nut associated with the aforementioned tool that allow easy tightening of the security nut, makes it difficult to remove the security nut when using ordinary tools, and makes it easy to remove the security nut if the dedicated tool is used. The security-nut tightening tool used for screwing and tightening the conical, trapezoidal security nut onto a bolt comprises a hollow section that covers and seats the tapered outer surface of the security nut, a rotation grip section that protrudes above the hollow section, a head female-thread section that is linked to a hollow space along the axis of the rotation grip section and screws onto the bolt, an inner tapered surface that is fixed to the inner wall surface of the tool and has the same slope angle as the tapered outer surface and an elastic friction part.

REFERENCES:
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patent: 3104569 (1963-09-01), Davis et al.
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patent: 4671141 (1987-06-01), Hanson
patent: 5065649 (1991-11-01), Evers et al.
patent: 5123310 (1992-06-01), McManus
patent: 5832796 (1998-11-01), Chopra
patent: 6189416 (2001-02-01), Groom
patent: 6877402 (2005-04-01), Pigford et al.
patent: 2004/0182206 (2004-09-01), Korpi

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