Apparatus for varying the flow area of a conduit
First Claim
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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; and
at 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.
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Accused Products
Abstract
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).
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Citations
17 Claims
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1. An apparatus for varying the flow area of a conduit, said apparatus including:
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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; and at 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. - View Dependent Claims (2, 3, 9, 11)
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4. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and biasing means associated with said flap to rotationally urge said flap against the action of said flow, wherein the biasing means includes a magnet mounted on the flap which, in the rest position, is positioned between at least two magnets mounted on the conduit remote from the flap magnet. - View Dependent Claims (5, 6)
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7. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and biasing means associated with said flap to rotationally urge said flap against the action of said flow, wherein the biasing means urges said flap to a rest position when no fluid is flowing through the conduit, and wherein the flap pivots about a shaft and the biasing means includes a flap magnet eccentrically mounted on the shaft, the flap magnet, in the rest position, is positioned between at least two magnets mounted on the conduit remote from the flap magnet. - View Dependent Claims (8)
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10. An apparatus as claimed in 1, wherein the flap progressively pivots to progressively increase the flow area of the conduit in response to increasing fluid flow therethrough.
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12. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and biasing means associated with said flap to rotationally urge said flap against the action of said flow, wherein an attracting magnet is placed on the conduit adjacent the flap magnet, when the flap is in the rest position, to attract the flap magnet and urge the flap into the rest position.
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13. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and biasing means associated with said flap to rotationally urge said flap against the action of said flow, wherein a ferro-magnetic metal is placed on the flap and is attracted by the conduit magnet to bias the flap to the rest position.
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14. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and biasing means associated with said flap to rotationally urge said flap against the action of said flow, wherein a ferro-magnetic metal can be placed on the conduit and a flap magnet used to attract the flap into the rest position.
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15. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap having a flap magnet mounted thereon and being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit; and an attracting magnet placed on the conduit adjacent the flap magnet, the attracting magnet urging the flap to a rest position.
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16. An apparatus for varying the flow area of a conduit, said apparatus including:
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a flap mounted in said conduit, said flap being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit, the flap being in a rest position when no fluid is flowing through the conduit; a conduit magnet mounted on said conduit; and a ferro-magnetic metal placed on the flap adjacent the conduit magnet, the conduit magnet biasing the flap to the rest position.
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17. An apparatus for varying the flow area of a conduit, said apparatus including:
- a flap mounted in said conduit, said flap having a flap magnet mounted thereon and being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit, the flap being in a rest position when no fluid is flowing through the conduit;
a conduit magnet mounted in said conduit; and a ferro-magnetic metal placed on the conduit adjacent the flap magnet, the ferro-magnetic metal and conduit magnet attracting the flap to the rest position.
- a flap mounted in said conduit, said flap having a flap magnet mounted thereon and being off-centre pivotally mounted to pivot in response to flow of fluid through said conduit, the flap being in a rest position when no fluid is flowing through the conduit;
Specification