Normally open reverse flow flapper valve
AssigneePratt & Whitney Canada Corp.
InventorsPaul Archibald Aitchison, Patrick David Germain, Henry Smith
Life of this patent
Estimating the term…
Abstract
A fluid flow actuated valve for controlling the fluid flow in a conduit comprises a support structure adapted to be mounted within the conduit and at least one flap member pivotally mounted to the support structure. The at least one flap member is pivotable between an first position for a minimum fluid flow and a second position for a maximum fluid flow. A torsion spring is attached to the at least one flap member to urge the same to pivot against a fluid pressure differential, from the first position to the second position when the fluid pressure differential is smaller than a predetermined level.
Claims9
A fluid flow actuated valve for controlling the fluid flow in a conduit for bleeding bypass fluid comprising:
- a support ring adapted to be mounted within the conduit:
- two flap members pivotally mounted to the support ring, respectively, and being pivotable between a first position in which the two flap members are substantially positioned in a plane normal to a central axis of the support ring for a minimum fluid flow passage and a second position for a maximum fluid flow passage;
- and
- spring means including at least one or more springs disposed in a position in which an axial axis of each spring is substantially perpendicular to an axial axis of the support ring, the spring means urging the flap members against a fluid pressure differential smaller than a predetermined level to pivot from the first position to the second position, and permitting the flap members under a fluid pressure differential not smaller than the predetermined level to pivot from the second position to the first position.
Dependencies are inferred from the claim text.