Blade damper with extensions to reduce boundary leakage

Details Blade damper with extensions to reduce boundary leakage Blade damper with extensions to reduce boundary leakage

1992-09-11

1994-08-02

Davis, Jr., Albert W.

Valves and valve actuation

Rotary valves

Butterfly

137875, 110263, F16K 122

Patent

active

053338383

ABSTRACT:
A blade damper for use in fluid flow control devices having damper blades mounted on an axle and having extension ears mounted at opposite ends of the damper blades. The extension ears are mounted in a 90 degree relationship to the damper blades and are semi-circular at their boundary to allow for rotation with the damper blades. The extension ears prevent fluid leakage through boundary planes perpendicular to the axle when the damper is open thereby providing near linear side blade opening versus fluid flow characteristics.

REFERENCES:
patent: 385135 (1888-06-01), Rathbone
patent: 1891768 (1932-12-01), Kishline
patent: 2092246 (1937-09-01), Firth
patent: 2095263 (1937-10-01), Moss
patent: 3286732 (1966-11-01), Alley
patent: 3894481 (1975-07-01), Alley
patent: 4095534 (1978-06-01), Goidich
patent: 4766807 (1988-08-01), Davis
patent: 4955296 (1990-09-01), Barlow

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