Patent
1990-03-16
1991-01-15
Combs, E. Michael
B21D 5324
Patent
active
049843192
ABSTRACT:
The method of manufacture and product by process of a laminated nut comprising a plurality of conical spring discs or spring washers and a cage for receiving and holding the spring discs in a stacked, aligned relationship to define a central opening threaded to be matably received upon an associated threaded bolt, with the cage comprising a plurality of fingers nested within slots defined in the flats of the spring discs and including protrusion means at one axial end of the nut cage to preclude gripping of the nut by a wrenching tool at the one axial end.
REFERENCES:
patent: 1874829 (1932-08-01), Swanstrom
patent: 1990718 (1935-02-01), Swanstrom
patent: 2090125 (1937-08-01), Hower
patent: 2320032 (1943-05-01), Danforth
patent: 2659406 (1953-11-01), Locke
patent: 2784428 (1957-03-01), Curran
patent: 3233262 (1966-02-01), Vollman
patent: 3461935 (1969-08-01), Monticelli
patent: 4383787 (1983-05-01), Reynolds
Combs E. Michael
Pac-Fasteners, (an affiliate of Peterson American Corporation)
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