Manually operated industrial roll door

Details Manually operated industrial roll door Manually operated industrial roll door

1990-04-05

1992-01-07

Machado, Reinaldo P.

Flexible or portable closure, partition, or panel

Roll type

With fabric free edge connected operator

160133, A47G 500

Patent

active

050781979

ABSTRACT:
A manually operated roll door. The door comprises a flexible door panel that is coiled on a drum located above the header of a doorway in a building, and the door panel is manually movable between an open position where the door panel is coiled on the drum, to a closed position where it encloses the doorway. A latch mechanism is associated with the door panel and automatically latches the door panel in the closed position. A handle is attached to the lower end of the door panel and the handle is connected to the latch mechanism in a manner such that an upward pull on the handle to open the door panel will simultaneously release the latch mechanism. A counterbalancing weight is operably connected to the door panel and partially counterbalances the weight of the door panel to aid in manually moving the door panel to the open position.

REFERENCES:
patent: 1912829 (1933-06-01), Crume
patent: 1994142 (1935-03-01), Madsen
patent: 3460602 (1969-08-01), Hugus
patent: 3878879 (1975-01-01), Mann
patent: 3981343 (1976-09-01), DeVito
patent: 4178978 (1979-12-01), Burnham
patent: 4237956 (1980-12-01), Sivin et al.
patent: 4770224 (1988-09-01), Dubbelman

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