Multi-headed screw

Details Multi-headed screw Multi-headed screw

1982-02-01

1985-03-05

Smith, Gary L.

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

Torque responsive nut or bolt driving connection

Frangible connection

411402, 411910, F16B 3100

Patent

active

045028257

ABSTRACT:
A screw member having a plurality of heads by providing one or more thin neck portions between them to be sheared at a predetermined torque, wherein a cap member surrounding the outer periphery of an inner head part from the side of its bearing surface is engaged with the inner head part so as not to displace outwardly slipping out of it, and the inner peripheral surface of the cap member is made conformable to a shape of the outer peripheral surface of a socket of a screw driving tool to be fitted on the inner head part.

REFERENCES:
patent: 1688400 (1928-10-01), Simpson
patent: 2316695 (1943-04-01), Jaffa
patent: 3383458 (1968-05-01), Raskhodoff et al.
patent: 3444775 (1969-05-01), Hills
patent: 3561317 (1971-02-01), Rowell
patent: 3635106 (1972-01-01), Homs
patent: 3742583 (1973-07-01), Devlin et al.
patent: 3779105 (1973-12-01), Triplett 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: 4242932 (1981-01-01), Barmore

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