Method and apparatus for door protection

Details Method and apparatus for door protection Method and apparatus for door protection

1980-10-20

1982-11-02

Kannan, Philip C.

Movable or removable closures

Processes

49 31, 49 65, 49 67, 49 68, 49199, 160 89, 160113, E06B 300

Patent

active

043566685

ABSTRACT:
This invention is a method and an apparatus by which a barrier is automatically placed before partially opened doors, which barrier is automatically removed when the door is fully opened and safe for travel. The invention includes means to detect when the door is fully opened and thereupon to activate barrier removal means, together with barrier placement means automatically activated at any time when the door is not fully opened.

REFERENCES:
patent: 1749985 (1930-03-01), Peelle
patent: 2449326 (1948-09-01), Schaefer
patent: 2458402 (1949-01-01), Myers
patent: 2770455 (1956-11-01), Brister
patent: 3103967 (1963-09-01), Gaschen
patent: 3616575 (1971-11-01), Harris

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