Circular door operating method and apparatus

Details Circular door operating method and apparatus Circular door operating method and apparatus

1988-02-01

1988-11-22

Kannan, Philip C.

Movable or removable closures

Convex or concave closure and opening

49118, 49141, 49177, E06B 334, E05B 6510

Patent

active

047855797

ABSTRACT:
A circular door operating method and apparatus comprising two pairs of arcked door leaves, two pairs of arcked fixed panels arranged so as to form an enclosure defining a cylindrical wind blocking compartment. Each door leaf is hinged at an end and releasably coupled at the other end to a hanger assembly traveling on a circular track by means of a pulley mechanism. When a door leaf is released from the hanger assembly to pivot about upper and lower hinge mechanisms for operation as a hinged door, not only the upper and lower hinge mechanisms firmly support the door leaf in place but also a control unit disables the sliding door operation, thus providing a quick and safe escape from the building in the event of an emergency.

REFERENCES:
patent: 931502 (1909-08-01), Schureman
patent: 3491483 (1970-01-01), Miller
patent: 4063388 (1977-12-01), Little
patent: 4458447 (1984-07-01), Heise et al.
patent: 4598495 (1986-07-01), Labarile

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