Shut-off damper

Details Shut-off damper Shut-off damper

1979-11-13

1981-03-17

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

49 92, 251306, F16K 1300

Patent

active

042561434

ABSTRACT:
A shut-off damper comprising a line of blades which are supported in a surrounding frame for rotary motion about substantially parallel axes to open or close an opening in the frame, and springy sealing strips each provided with a lining or cover of synthetic rubber or other resilient material so that the end portions of the blades make sealing contact with the said linings or covers to reduce or prevent the leakage of fluid past the blades when they are in their fully-closed positions.

REFERENCES:
patent: 1872599 (1932-08-01), LeGrand
patent: 2683907 (1954-07-01), Lovasik
patent: 2905985 (1959-09-01), Garrett
patent: 3084715 (1963-04-01), Scharres
patent: 3180246 (1965-04-01), Johnson
patent: 3357137 (1967-12-01), Lombardi
patent: 3372514 (1968-03-01), Adams
patent: 3771559 (1973-11-01), Alley
patent: 3783768 (1974-01-01), Caming
patent: 3885347 (1975-05-01), Adachi
patent: 4192098 (1980-03-01), Brzezinski

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