초록 ▼

An apparatus (10) for varying the flow area of a conduit (12). The apparatus comprises a flap (14) mounted in said conduit (12) which is off-center pivotally mounted to pivot in response to flow of fluid (F) through said conduit (12). The apparatus (10) also includes biasing means associated with th

An apparatus (10) for varying the flow area of a conduit (12). The apparatus comprises a flap (14) mounted in said conduit (12) which is off-center pivotally mounted to pivot in response to flow of fluid (F) through said conduit (12). The apparatus (10) also includes biasing means associated with the flap to rotationally urge the flap against the action of the flow (F).

대표청구항 ▼

[ I claim:] [1.] An apparatus for varying the flow area of a conduit, said apparatus including:a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit;a flap magnet fixedly mounted relative to the flap to pivot with the

[ I claim:] [1.] An apparatus for varying the flow area of a conduit, said apparatus including:a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit;a flap magnet fixedly mounted relative to the flap to pivot with the flap; andat least two conduit magnets fixedly mounted to the conduit the flap and conduit magnets adapted to rotationally urge said flap against the action of said flow.