Doorknob security device

Details Doorknob security device Doorknob security device

1988-06-03

1990-02-13

Wolfe, Robert L.

Locks

Operating mechanism

Key

70424, E05B 1714

Patent

active

048995649

ABSTRACT:
The present invention entails a doorknob security device for preventing access to the outer surface of the doorknob and particularly to a keyhole or other locking and unlocking mechanisms formed about the surface of the knob. In particular, the security device of the present invention comprises an outer main housing and a rotatable inner closure panel. The inner closure panel is rotatable from a closed to an open position. In the open position the security device easily accepts a doorknob. In the closed position the security device encompasses and closes the doorknob preventing access to the same.

REFERENCES:
patent: 1439552 (1922-12-01), Johnson
patent: 4226104 (1980-10-01), Oliver
patent: 4285221 (1981-08-01), Atchisson
patent: 4503692 (1985-03-01), Grint
patent: 4570470 (1986-02-01), Gray
patent: 4631938 (1986-12-01), Johnson

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