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US 4,856,552 AGranted
Flow regulating device
AssigneeSilkbell Limited
InventorLourens A. V. Hiemstra
Life of this patent
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AssigneeSilkbell Limited
InventorLourens A. V. Hiemstra
Estimating the term…
A flow regulating device comprises a chamber forming element covered by a tube of elastomeric material, which together form a flow passage leading from an inlet port to an outlet port. The flow passage forms a first flow chamber which is partly defined by the elastomeric tube and which is configured such that flow of fluid through the chamber causes inward deflection of the tube and thus constricts the flow cross section of the first flow chamber. The flow passage further forms a second flow chamber downstream of the first flow chamber, the second flow chamber being partly defined by the elastomeric tube, and the configuration being such that flow of fluid through the second flow chamber causes the tube to deflect inwardly and thus constrict the flow cross section of the second flow chamber. In one embodiment the arrangement is such that vortex flow is induced in each of the flow chambers. In a further embodiment, the flow connection between the first and second flow chambers is provided by a tortuous flow passage.
A flow regulating device which comprises means for defining an inlet port, an outlet port and a flow passage leading from the inlet port to the outlet port, said flow passage forming a first flow chamber and a second flow chamber downstream of the first flow chamber, the first flow chamber being partly defined by a first resiliently deflectable wall whose span across the width of the first flow chamber is substantially greater than the depth of the first flow chamber and which is configured such that fluid flowing through the first flow chamber, be Venturi action, causes deflection of a first deflectable wall inwardly of the first flow chamber to constrict the flow cross-section of the first flow chamber, and the second flow chamber being partly defined by a second resiliently deflectable wall whose span across the width of the second flow chamber is substantially greater than the depth of the second flow chamber and which is configured such that fluid flowing through the second flow chamber, by Venturi action, causes deflection of the second deflectable wall inwardly of the second flow chamber to constrict the flow cross-section of the second flow chamber.
A flow regulating device which comprises means for defining an inlet port, an outlet port and a flow passage leading from the inlet port to outlet port, said flow passage forming a first flow chamber and a second flow chamber downstream of the first flow chamber, the first flow chamber being at least partly defined by a first resiliently deflectable wall which is configured such that deflection thereof inwardly of the the first flow chamber constricts the flow cross-section of the first flow chamber, the second flow chamber being at least partly defined by a second resiliently deflectable wall which is configured such that deflection thereof inwardly of the second flow chamber constricts the flow cross-section of the second flow chamber, and the configuration of said first and second flow chambers further being such that, with the first and second resiliently deflectable walls in their undeflected condition, the flow cross-section of the first flow chamber is smaller than that of the second flow chamber.
A flow regulating device which comprises means for defining an inlet port, an outlet port and a flow passage leading from the inlet port to outlet port, said flow passage forming a first flow chamber and a second flow chamber downstream of the first flow chamber, the first flow chamber being at least partly defined by a first resiliently deflectable wall which is configured such that deflection thereof inwardly of the the first flow chamber constricts the flow cross-section of the first flow chamber, the second flow chamber being at least partly defined by a second resiliently deflectable wall which is configured such that deflection thereof inwardly of the second flow chamber constricts the flow cross-section of the second flow chamber, wherein said means comprises a chamber-forming element in which there are two outwardly open recesses, and wherein said deflectable walls are formed by a tube of elastomeric material encircling said element to span each of the recesses, each said chamber being formed by a respective one of the recesses and that part of the elastomeric tube spanning it.
Dependencies are inferred from the claim text.