Security step or stop for slidable door

Details Security step or stop for slidable door Security step or stop for slidable door

1976-11-09

1978-02-14

Moore, Richard E.

Closure fasteners

Extension link

292288, E05C 1708

Patent

active

040735222

ABSTRACT:
A hinged unit that serves as a security door step to prevent opening of a slidable door. The unit consists of a pair of bars pivotably linked together at adjoining ends and of a length to fit in the extended position, between an external bottom side edge of a slidable door and the bottom side edge of the door frame within the bottom channel in which the door slides to block movement of the door in the closed door position. The hinge line is located below the horizontal longitudinal axis of the joined bars in the extended position. A pivoted kicker plate is pivoted to one bar so that downward pressure on the kicker plate serves to raise the hinge point above the horizontal axis so that the bars will fold upward about the hinge point to permit the bars to fold against the door frame along a vertical axis as the door is opened.

REFERENCES:
patent: 136431 (1873-03-01), Gates
patent: 1392467 (1921-10-01), Topp
patent: 2647782 (1953-08-01), Fisk
patent: 3698754 (1972-10-01), Means
patent: 3820285 (1974-06-01), Shiffler et al.
patent: 3825290 (1974-07-01), Messina et al.

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