Multi-headed screw

Details Multi-headed screw Multi-headed screw

1982-02-01

1985-03-12

Smith, Gary L.

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

Torque responsive nut or bolt driving connection

Frangible connection

411373, 411402, 411539, 411910, F16B 3100

Patent

active

045041806

ABSTRACT:
A screw member having a plurality of heads by providing one or more thin neck portions to be sheared at a predetermined torque, in which a collar having a skirt portion with its one part being cut away is fitted on the thin neck portion from the lateral side to expose the outer head part alone and to engage the cap member fitted from the side of the bearing surface of the inner head part of the screw member, and the cap member is inserted between the skirt of the collar and the inner head part to thereby prevent the collar from slipping out.

REFERENCES:
patent: 790142 (1905-05-01), Lichetti
patent: 3289524 (1966-12-01), Rubin
patent: 3383458 (1968-05-01), Raskhodoff et al.
patent: 3444775 (1969-05-01), Hills
patent: 3561317 (1971-02-01), Rowell
patent: 3742583 (1973-07-01), Devlin et al.
patent: 3812757 (1974-05-01), Reiland
patent: 3909098 (1975-09-01), Reed et al.
patent: 4029379 (1977-06-01), Kotala et al.
patent: 4219693 (1980-08-01), French
patent: 4372593 (1983-02-01), Kesselman

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