Fastener with tightening structure

Details Fastener with tightening structure Fastener with tightening structure

2007-10-23

2007-10-23

Mitchell, Katherine (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having structure to restrict rotation of threaded, mating...

Structure is coaxial, distinct member that restricts nut piece

C411S265000, C411S935000, C411S368000

Reexamination Certificate

active

11355498

ABSTRACT:
A tightening structure for locking, comprises a nut, a bolt, and a washer with a hole through which an axis of the bolt passes. To enable the structure to lock more firmly, a recessed part symmetrical with respect to an axis, and having a generally trapezoidal shape in cross section, is formed in the nut, and a projection, symmetrical with respect to an axis, and having a generally trapezoidal cross section is formed on the washer. The hole in the washer is eccentric to the projection of the washer.

REFERENCES:
patent: 2244400 (1941-06-01), Miller
patent: 2261195 (1941-11-01), von Herz et al.
patent: 2378118 (1945-06-01), Widrich
patent: 2387742 (1945-10-01), Burrows
patent: 2412409 (1946-12-01), Martin
patent: 2494882 (1950-01-01), Kost
patent: 2529854 (1950-11-01), Tarwater
patent: 4971489 (1990-11-01), Womack
patent: 4971498 (1990-11-01), Goforthe
patent: 5158409 (1992-10-01), Ishida
patent: 6112371 (2000-09-01), Tremblay

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