Entry impedient device

Details Entry impedient device Entry impedient device

1979-12-10

1981-12-01

Moore, Richard E.

Closure fasteners

Bolts

Sliding

292DIG15, E05C 112

Patent

active

043032664

ABSTRACT:
Door opening prevention apparatus which is adapted to be installed in the floor in a door opening whereby a door opening impeding device is released when someone steps on the apparatus to prevent opening of the door until the device is returned to its inactive position.

REFERENCES:
patent: 1271363 (1918-07-01), Ralston
patent: 1866233 (1932-07-01), Tarrant
patent: 1895146 (1933-01-01), Brown
patent: 2291402 (1942-07-01), Miller
patent: 3621686 (1971-11-01), Klein
patent: 3805322 (1974-04-01), Serrano

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