Double door swing control

Details Double door swing control Double door swing control

1992-01-28

1993-03-16

Kannan, Philip C.

Movable or removable closures

Closures interconnected for concurrent movement

Opposed similar movement

49366, E05C 706

Patent

active

051933071

ABSTRACT:
A double door swing control apparatus for facilitating the simultaneous opening of a pair of conventional, separately hinged double swing doors having hinges attached externally to the door such that the pivot axis of the door is external to the door. The invention includes a pair of spools and a pair of brackets secured to the top or bottom surface of the respective doors. A shaft connects each spool to a respective bracket, whereby movement of the associated door causes rotation of that spool. Cables connect and extend between the spools such that rotation of one spool causes an equal and opposite rotation of the other spool causing the doors to open and close in unison. The invention may be mounted either above or below the door.

REFERENCES:
patent: 615194 (1898-11-01), Parkinson
patent: 1222136 (1917-04-01), Reynolds
patent: 1529798 (1925-03-01), Knapp et al.
patent: 1676064 (1928-07-01), Vreeland
patent: 1841868 (1932-01-01), Wuebling
patent: 3370381 (1968-02-01), Wetter
patent: 4186521 (1980-02-01), Hunter
patent: 4641460 (1987-02-01), Kriegel
patent: 4733498 (1988-03-01), Kriegel

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