Door security apparatus

Closure fasteners – Clamps – Portable

Patent

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Details

292288, E05C 1918

Patent

active

049556487

ABSTRACT:
A security apparatus for preventing opening of a hinged door from the inward swinging side, the door being received in a door frame having a door facing on the outward swinging side, the door including a door knob extending from the outward swinging side, the door knob having a shaft portion, the apparatus having a web portion having first and second spaced ends, a first flange portion depending in a first direction from the first end of the web portion and generally transversely thereto, the first flange portion having a first notch for receiving the shaft portion, a second flange portion depending in the second direction from a second end of the web portion and generally transversely thereto, the second flange portion having an inner surface which faces in a direction toward an imaginary plane passing through the first flange portion transversely to the web portion such that when the door is closed and the shaft position of the door knob on the outward swinging side is received in the notch of the first flange portion, the inner surface of the second flange portion abuts or lies closely adjacent the door facing on the outward swinging side of the door.

REFERENCES:
patent: 893463 (1908-07-01), Denny et al.
patent: 1239802 (1917-09-01), Macbeth
patent: 1571543 (1926-02-01), Fratzke
patent: 2151587 (1939-03-01), Cassileth
patent: 3791096 (1974-02-01), Epperlein
patent: 4012065 (1977-03-01), Miller
patent: 4082334 (1978-04-01), Volta et al.
patent: 4334705 (1982-06-01), Rumph
patent: 4575140 (1986-03-01), Dargis
patent: 4770450 (1988-09-01), Docus

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