Bistable shaft retaining element

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Fastener securing element – Resilient metallic

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Details

411515, 411516, 411513, 411521, 411358, 403377, F16B 2114

Patent

active

047752734

ABSTRACT:
A positionally bistable domed annular disc includes a projection which engages a transverse through hole or a recess in a shaft to be retained. The disc fits concentrically about the shaft and is concave in different directions when in its two stable positions, respectively. In a cotter pin embodiment the projection extends from the outer rim of the disc and is bent to fit solidly in a transverse hole in the shaft. The projection is inserted when the disc is convex toward the hole and not surrounding the shaft. When switched to be concave toward the hole the disc surrounds the shaft to preclude longitudinal and rotative movement of the projection. In a retainer ring embodiment the projection is a plurality of fingers extending from one or both rims and arranged to engage the shaft or the bore in which the shaft is retained in its closed position. In a shaft coupling embodiment the projecting fingers engage two or more shafts in a manner which tolerates axial, radial and angular shaft misalignment.

REFERENCES:
patent: 639337 (1899-12-01), Anthony
patent: 1194426 (1916-08-01), Richey
patent: 1467781 (1923-09-01), Dawson
patent: 1664890 (1928-04-01), Kresci
patent: 1988345 (1935-01-01), Vaughn
patent: 2299752 (1942-10-01), Johnson
patent: 2368544 (1945-01-01), Hogan
patent: 2401856 (1946-06-01), Brock
patent: 2503854 (1953-04-01), Trainor
patent: 3118718 (1964-01-01), Babey
patent: 3233497 (1966-02-01), McCormick
patent: 3483789 (1969-12-01), Wurzel
patent: 3604738 (1971-09-01), Alpaugh

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