Door closure apparatus

Details Door closure apparatus Door closure apparatus

1978-06-16

1980-03-04

Foss, J. Franklin

Closure fasteners

Bolts

Sliding

49 7, 292DIG66, E05C 106

Patent

active

041914120

ABSTRACT:
A door closure apparatus is provided for automatically closing a bifold door of a storage cabinet for combustible materials in the event of elevated temperatures. A guide assembly hingedly mounted on the free end of the folding door includes guide fingers which ride along a guide path in a channel guide track at the top of the cabinet. At one end of the track there is mounted a bracket slidably carrying a latch member movable between a latching condition in the guide path and a release condition out of the guide path. The latch member is normally held in its latching condition by a spring and fusible link combination which override a smaller spring urging the latch member toward its release condition. Upon melting of the fusible link the latch member is moved to its release condition by the smaller spring. The latch member is shaped to permit the guide member to cam past it as the door moves to its open position but prevents return movement of the guide member to hold the door in its open position. The latch member may be manually operated.

REFERENCES:
patent: 1709305 (1929-04-01), Brunst et al.
patent: 1845448 (1932-02-01), Sheard
patent: 1913725 (1933-06-01), Schweig
patent: 2730900 (1956-01-01), Rowley
patent: 3383796 (1968-05-01), Fredrick et al.
patent: 3403954 (1968-10-01), Williams
patent: 3614975 (1971-10-01), Aymond
patent: 3744832 (1973-07-01), Casey
patent: 3777422 (1973-12-01), Janssen
patent: 4007954 (1977-02-01), Erickson

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