Fluid flow control device comprising a deformable masking membra

Details Fluid flow control device comprising a deformable masking membra Fluid flow control device comprising a deformable masking membra

1992-02-13

1993-04-06

Nilson, Robert G.

Valves and valve actuation

Relatively movable valve elements form single port closure

251294, 251331, 251901, F16K 700

Patent

active

051996855

ABSTRACT:
A fluid flow control device comprises a duct having a masking membrane arranged within the duct for movement between a first position, in which it closes the duct, and a second position in which it allows fluid to pass through the duct. The masking member is in the form of a deformable membrane disposed across the duct, the membrane having two portions having bellows-type folds and opposed end elements defining between them a flow aperture, which can be opened or closed to adjust the fluid flow.

REFERENCES:
patent: 2674064 (1954-04-01), Gassaway
patent: 2874925 (1959-02-01), Stafford
patent: 3204919 (1965-09-01), Tripoli

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