Fluid valves
First Claim
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1. A valve, comprising:
- a fluid port;
a valve seat round the port; and
closure means movable towards and away from the seat, the closure means including a sealing surface engageable with the seat and a protrusion of resilient material which extends from the sealing surface towards the seat, the protrusion being from the sealing surface towards the seat, the protrusion being operative to create a flow of fluid of increased velocity between the seat and the sealing surface prior to the latter engaging the seat upon movement of the closure means towards the seat and the protrusion further being adapted for at least part thereof to be urged automatically into sealing engagement with the surround of the port by fluid pressure in the valve when the sealing surface engages the seat, the closure means further including a resilient diaphragm which is adapted to isolate operating means for the closure means from fluid flowing through the valve and which is adapted to be anchored in an outer peripheral zone thereof to a casing for the valve, the diaphragm being provided at its outer peripheral zone with a screw thread engageable with a screw thread on at least one of two parts between which the outer peripheral zone of the diaphragm is adapted to be trapped.
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Abstract
A valve including a fluid port; a valve seat round the port; and closure means movable towards and away from the seat, the closure means including a sealing surface engageable with the seat and a protrusion which extends from the sealing surface towards the seat, the protrusion being operative to create an accelerated flow of fluid between the seat and the sealing surface prior to the latter engaging the seat upon movement of the closure means towards the seat and the protrusion further being adapted for at least part thereof to be urged into sealing engagement with the surround of the port by pressure in the valve when the sealing surface engages the seat.
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Citations
24 Claims
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1. A valve, comprising:
- a fluid port;
a valve seat round the port; and
closure means movable towards and away from the seat, the closure means including a sealing surface engageable with the seat and a protrusion of resilient material which extends from the sealing surface towards the seat, the protrusion being from the sealing surface towards the seat, the protrusion being operative to create a flow of fluid of increased velocity between the seat and the sealing surface prior to the latter engaging the seat upon movement of the closure means towards the seat and the protrusion further being adapted for at least part thereof to be urged automatically into sealing engagement with the surround of the port by fluid pressure in the valve when the sealing surface engages the seat, the closure means further including a resilient diaphragm which is adapted to isolate operating means for the closure means from fluid flowing through the valve and which is adapted to be anchored in an outer peripheral zone thereof to a casing for the valve, the diaphragm being provided at its outer peripheral zone with a screw thread engageable with a screw thread on at least one of two parts between which the outer peripheral zone of the diaphragm is adapted to be trapped.
- a fluid port;
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2. A valve, comprising:
- a fluid port;
a valve seat round the port; and
closure means movable towards and away from the seat, the closure means including a sealing surface engageable with the seat and a protrusion of resilient material which extends from the sealing surface towards the seat, the protrusion being operative to create a flow of fluid of increased velocity between the seat and the sealing surface prior to the latter engaging the seat upon movement of the closure means towards the seat and the protrusion further being adapted for at least part thereof to be urged automatically into sealing engagement with the surround of the port by fluid pressure in the valve when the sealing surface engages the seat, the closure means further including a resilient diaphragm which is integrally formed with the part of the closure means defining the sealing surface and protrusion and which is adapted to isolate operating means for the closure means from fluid flowing through the valve, the closure means and diaphragm comprising a deformable cup-shaped housing of resilient material which comprises a generally tubular wall and a base with a substantially plane outer end face when the housing is in a normal undeformed condition; and
an oversized deformation member having a larger outer diameter than the diameter of the inner periphery of the housing in the zone of the base thereof when the housing is in a normal undeformed condition, the deformation member being locatable in the housing adjacent to the base thereof to deform the wall and base of the housing to form an outward bulge in the housing which defines the sealing surface and also to form a resilient protrusion of smaller diameter than the bulge which extends from the sealing surface on the bulge, the protrusion having a recessed outer end face defining a peripheral formation adapted to be urged automatically into sealing engagement with the surround of the port by fluid pressure in the valve when the sealing surface engages the seat. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a fluid port;
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3. A valve, comprising:
- a fluid port;
a valve seat round the port; and
closure means movable towards and away from the seat, the closure means comprising a deformable cup-shaped housing of resilient material which in a normal undeformed condition comprises a generally tubular wall and a base having a substantially plane outer end face extending transversely across an end of the tubular wall; and
an oversized deformation member having a larger outer diameter than the diameter of the inner periphery of the housing in the zone of the base thereof when the housing is in a normal undeformed condition, the deformation member being locatable in the housing adjacent to the base thereof to deform the wall and base to form a bulge in the housing which defines an annular resilient sealing surface on the outside of the housing which is engageable with the valve seat and also to form a resilient protrusion of smaller diameter than the bulge which extends from the sealing surface towards the valve seat and which is adapted to enter the port, the protrusion further being adapted for at least part thereof to be urged automatically into sealing engagement with the surround of the port by fluid pressure in the valve when the sealing surface engages the seat. - View Dependent Claims (4, 5, 6, 7, 8, 9)
- a fluid port;
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21. Valve closure means comprising a deformable cup-shaped housing of resilient material which in a normal undeformed condition comprises a generally tubular wall and a base having a substantially plane outer end face extending transversely across an end of the tubular wall;
- and an oversized deformation member having a larger outer diameter than the diameter of the inner periphery of the housing in the zone of the base thereof when the housing is in a normal undeformed condition, the deformation member being locatable in the housing adjacent to the base thereof to deform the wall and base of the housing to form an outward bulge in the housing which defines an annular resilient sealing surface on the outside of the housing and also to form a resilient protrusion of smaller diameter than the bulge which extends away from the sealing surface and is deformable by fluid pressure.
- View Dependent Claims (22)
- 23. In or for valve closure means, a deformable cup-shaped housing of resilient material which in a normal undeformed condition comprises a generally tubular wall and a base having a substantially plane outer end face extending transversely across an end of the tubular wall, the housing being adapted to receive in a position adjacent to its base an oversized deformation member having a larger outer diameter than the diameter of the inner periphery of the housing in the zone of the base thereof when the housing is in a normal undeformed condition, the wall and base of the housing being deformable by the deformation member to form an outward bulge in the housing which defines an annular resilient sealing surface on the outside of the housing and also to form a resilient protrusion of smaller diameter than the bulge which extends from the sealing surface, the open end of the housing including a screw thread engageable with a screw thread on at least one of two parts between which the open end is adapted to be trapped.
Specification