Device for automatically opening and closing a door

Details Device for automatically opening and closing a door Device for automatically opening and closing a door

1989-03-09

1990-05-15

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

One direction pull cable

49 32, 49280, 49301, E05F 1104

Patent

active

049246267

ABSTRACT:
A device for automatically opening and closing a door by turning the door through an angle of 90.degree. from an open to a closed position and vice versa.

REFERENCES:
patent: 263771 (1882-09-01), Derr
patent: 1267307 (1918-05-01), Becker
patent: 1328979 (1920-01-01), Becker
patent: 2186825 (1940-01-01), Dome
patent: 2549451 (1951-04-01), Gossling
patent: 2800323 (1957-07-01), West et al.
patent: 2971755 (1961-02-01), Green
patent: 3332472 (1967-07-01), Wiegand
patent: 3857197 (1974-12-01), Reddy et al.
patent: 4616444 (1986-10-01), Taylor

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