Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1983-06-03
1985-12-17
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
251 62, 92 53, F16K 31126
Patent
active
045587183
ABSTRACT:
A device for controlling air or heat flow within an air passageway ducting, or other air passageways, having low cost, high efficiency and easily installed, is in the form of a Force Air Ducting Flow Control Valve. The valve has a rubber or synthetic rubber bladder, controlled by a telescoping piston, which, using compressed air from an outside source, moves the bladder across the air passageway and causes the bladder to fill with compressed air and expand until constrained by an outer metal or plastic air permeable case, thus forming an efficient obstruction in the air passageway on two sides of the bladder. Between the bladder and the outer case is a blanket of flexible material, preferably an insulator such as "space blanket," which is attached, in the middle to the end of the bladder and on the ends to spring loaded cylinders in such a way, as to protect and insulate the bladder when it is against the case, and to provide pressure to move the bladder and telescoping piston from causing an obstruction in the air passageway, when the air pressure within the bladder and telescoping piston is equal to atmospheric pressure.
REFERENCES:
patent: 1095926 (1914-05-01), Powell
patent: 1685697 (1928-09-01), Guerin
patent: 2416796 (1947-03-01), Dobbs
patent: 3117723 (1964-01-01), Church
patent: 3150571 (1964-09-01), Frassetto et al.
patent: 3900299 (1975-08-01), Spehrley
patent: 3942552 (1976-03-01), Logsdon
patent: 4235256 (1980-11-01), Crawshay
Chambers A. Michael
Fox John C.
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