System to install a vandal-resistant screw

Details System to install a vandal-resistant screw System to install a vandal-resistant screw

1987-01-13

1989-01-31

Olszewski, Robert P.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

295251, 411910, B25B 3100

Patent

active

048007870

ABSTRACT:
A system to install a vandal-resistant screw. The system includes a screw having a head with a peripheral thread on the head. A tightening member is formed with a cavity. An internal thread within the cavity is able to tighten onto the peripheral thread on the head of the screw. A finishing member is formed with a cavity adapted to fit over the screw head. There are abrading surfaces within the cavity of the finishing member whereby the thread on the periphery of an installed screw can be abraded away by the abrading surfaces.

REFERENCES:
patent: 1243799 (1917-10-01), Bissell
patent: 1856002 (1932-04-01), Starkin
patent: 2103944 (1937-12-01), Gullborg
patent: 3932904 (1976-01-01), Starkin
patent: 4205493 (1980-06-01), Kim

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