Static structures (e.g. – buildings) – Shaped or strengthened by fluid pressure – Fluid pressure is subatmospheric
Patent
1987-02-06
1988-06-14
Friedman, Carl D.
Static structures (e.g., buildings)
Shaped or strengthened by fluid pressure
Fluid pressure is subatmospheric
52173DS, 14 715, E04B 134
Patent
active
047502991
ABSTRACT:
A seal disposed about the periphery of an opening such as a warehouse door includes an inflatable head bag and a pair of facing inflatable side bags. The head and side bags are each comprised of a plurality of serially coupled, elongated, aligned pleated sections which are separated by apertured baffles for regulating air flow between adjacent pleated sections. A source of air under pressure such as a blower directs air into an upper head bag which, in turn, directs the air flow into the facing side bags via respective duct arrangements coupling the head bag to the side bags. Under pressure, the head and side bags expand toward the center of the opening to enclose in a sealed manner an object such as a loading vehicle positioned within the opening. Disposed within and along the width of each of the side bags are a plurality of spaced horizontal ropes or straps which are coupled at a first end thereof via an alignment tube to the nose edge of the end, or distal, pleated bag section, and at a second end thereof to vertically movable weights which bias the side bags to the retracted or open positon when air under pressure is no longer provided to the side bags. A plurality of spaced vertical retraction straps in the head bag are wrapped around a spring-biased roller tube positioned in an upper portion of a support frame and extending across the opening for rolling the head bag up in a retracted position when air under pressure is no longer delivered to the perimeter seal.
REFERENCES:
patent: 3230675 (1966-01-01), Frommelt et al.
patent: 3303615 (1965-02-01), O'Neal
patent: 3391503 (1968-07-01), O'Neal
patent: 3665997 (1972-05-01), Smith et al.
patent: 3816867 (1974-06-01), Shirzad et al.
patent: 3826049 (1974-07-01), Frommelt et al.
patent: 3939614 (1976-02-01), Frommelt et al.
patent: 3994103 (1976-11-01), Ouellet
patent: 4262458 (1981-04-01), O'Neal
patent: 4389821 (1983-06-01), O'Neal
patent: 4554768 (1985-11-01), Srajer
patent: 4671029 (1987-06-01), Bennett, deceased et al.
Brochure from Kelley Company, Inc., 6720 North Teutonia Avenue, Milwaukee, Wisconsin 53209-9993, entitled "Seven Foot Wide Dockleveler with `V` Seal--A Winning Combination".
Brochure of Serco Engineering Corporation, Albany, N.Y. 12020, entitled "Dock Seals and Shelters".
Frommelt John A.
Frommelt Robert J.
Friedman Carl D.
Frommelt Industries, Inc.
Smith Creighton
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