Tamper-proof threaded fastenings

Details Tamper-proof threaded fastenings Tamper-proof threaded fastenings

1985-07-11

1986-10-14

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

411429, 411910, B25B 1306

Patent

active

046165355

ABSTRACT:
The fastening device has a head portion with a uniform cross section, the uniform cross section having a plurality of non-uniform indentations. A matching socket wrench is provided having an internal cross section matching the exterior cross section of the fastening for tightening or loosening the fastening. The invention is particularly useful for preventing unauthorized removal of automobile wheels.

REFERENCES:
patent: 529683 (1894-11-01), Herman
patent: 1447564 (1923-03-01), Norlund et al.
patent: 2040383 (1936-05-01), Jasper
patent: 2372269 (1945-03-01), Golan
patent: 3482481 (1969-12-01), Newell et al.
patent: 3631757 (1972-01-01), Parkin
patent: 3695124 (1972-10-01), Myers
patent: 3763725 (1973-10-01), Reiland
patent: 3908489 (1975-09-01), Yamamoto et al.
patent: 3930428 (1976-01-01), Hale
patent: 4018133 (1977-04-01), Chaiure et al.
patent: 4027572 (1977-06-01), Burge
patent: 4521146 (1985-06-01), Wharton

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