Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent
1976-01-07
1978-01-10
Gelak, Bernard A.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
24221R, A44B 1700
Patent
active
040670902
ABSTRACT:
A fastener for coupling two relatively thin members having oversized openings therein such as road guard rails which are subject to severe shear loads. The fastener includes a stud having an enlarged head portion and a body portion extending therefrom. The body portion is adapted to pass through the oversized openings and the head is adapted to engage with the surface of the adjacent thin member and is larger than the opening therein. A receptacle is provided which is adapted to interengage and disengage with the stud body between a fastened and unfastened position. At least one spiral cam slot is on the stud body and a corresponding cam surfaces on the receptacle whereby relative rotation between the stud body and receptacle will cause the cam surface to follow the cam slot between the locked and unlocked positions. A spring is positioned to be biased as the cam surface follows the spiral cam slots thereby assisting in drawing the two members into tight interengagement and retaining the stud and receptacle in fastened condition. Finally, a retainer is provided for maintaining proper orientation of the fastener when the members are subjected to a shear load so that the primary load on the fastener is a shear load thereby increasing the load therein capacity of the fastener.
REFERENCES:
patent: 1666783 (1928-04-01), Kries
patent: 2123068 (1938-07-01), Summers
patent: 2339591 (1944-01-01), Weber
patent: 2399750 (1946-05-01), Marty
patent: 2502539 (1950-04-01), Tinnerman
patent: 2542968 (1951-02-01), Zahodiakin
patent: 2670513 (1954-03-01), Schlueter
patent: 3124993 (1964-03-01), Schlueter
patent: 3755860 (1973-09-01), Schenk
patent: 3874041 (1975-04-01), Smith
Dzus Fastener Co. Inc.
Gelak Bernard A.
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