Valves and valve actuation – Rotary valves – Butterfly
Patent
1993-07-26
1994-12-06
Fox, John C.
Valves and valve actuation
Rotary valves
Butterfly
251145, F16K 122
Patent
active
053703600
ABSTRACT:
This is a unitary bellmouth duct fitting having a tubular body portion and a bellmouth portion; the tubular body portion has a circumferential terminal edge from which the bellmouth portion or flange radially and integrally extends and the bellmouth portion merges with the tubular body portion to provide a less than two inch radius; the bellmouth portion has a lower surface which has a double sided adhesive first gasket engaged therewith and has a series of spaced holes formed therethrough, the first gasket is of a somewhat malleable material, and is of a ring-shaped configuration, the tubular body portion has an inner surface, the first gasket is of a malleable material and of a ring-shaped configuration, a first, through aperture is formed in the body portion spaced from the bellmouth portion, a second through aperture is formed in the body portion on the same horizontal plane as the first aperture, a damper fitted within the bellmouth duct fitting, the damper of a disk like configuration, has an upper surface, a peripheral edge and an outside diameter a solid threaded bearing is attached to the upper surface of the damper at opposite sides of the peripheral edge, each of the solid threaded bearings includes a threaded element, the threaded elements of the solid threaded bearings extend beyond the peripheral edge of the damper, one of the threaded elements passed through the first aperture and the other threaded element passed through the second aperture, a gasketed washer engaged around the threaded element bearing against the inner surface adjacent the second aperture.
REFERENCES:
patent: 1823028 (1931-09-01), Caldwell
patent: 2101311 (1937-12-01), Duncan
patent: 3771759 (1973-11-01), Pauquette
patent: 3880189 (1975-04-01), Bennett
patent: 4715581 (1987-12-01), Myers
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