Hydraulic flow control valves
First Claim
1. A regulator valve comprising first and second opposing rigid walls, portions of said walls having a rocking engagement with each other, a sealing membrane sealingly connecting together said walls around their peripheries and permitting relative rocking movement of said walls, confronting inner faces of said walls together with said sealing membrane bounding a first chamber, an outer face of said first wall bounding a second chamber, a first restriction of predetermined size connecting said first and second chambers, said second wall being formed with a transfer passage spaced from said rocking engagement, said inner face of said second wall being provided with a valve seat portion surrounding the end of said transfer passage adjacent to said first wall, a valve member portion of said inner face of said first wall defining with said valve seat portion a second restriction of variable size, and resilient means acting between said walls in the direction to increase the size of said second restriction, whereby an increase in the pressure in said second chamber relative to the pressure in said transfer passage brings about a reduction in the size of said second restriction.
1 Assignment
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Accused Products
Abstract
The regulator valve has a first restriction of fixed size in series with a second, variable restriction defined between a tilting wall and an annular valve seat provided on a fixed wall. The tilting wall is sealed around its periphery to the fixed wall by an elastomeric membrane to define between the walls a first chamber, and the walls are biassed apart by a compression spring. A second chamber is defined on the opposite side of the tilting wall to the first chamber such that the tilting wall is subject to the pressure differential between the first and second chambers, and the first restriction connects the two chambers. The size of the second restriction is thereby made dependent upon the pressure difference between the two chambers. The tilting wall tilts about a fulcrum line. The valve seat may be pressure-balanced by a balancing member.
76 Citations
9 Claims
- 1. A regulator valve comprising first and second opposing rigid walls, portions of said walls having a rocking engagement with each other, a sealing membrane sealingly connecting together said walls around their peripheries and permitting relative rocking movement of said walls, confronting inner faces of said walls together with said sealing membrane bounding a first chamber, an outer face of said first wall bounding a second chamber, a first restriction of predetermined size connecting said first and second chambers, said second wall being formed with a transfer passage spaced from said rocking engagement, said inner face of said second wall being provided with a valve seat portion surrounding the end of said transfer passage adjacent to said first wall, a valve member portion of said inner face of said first wall defining with said valve seat portion a second restriction of variable size, and resilient means acting between said walls in the direction to increase the size of said second restriction, whereby an increase in the pressure in said second chamber relative to the pressure in said transfer passage brings about a reduction in the size of said second restriction.
- 6. A regulator valve comprising first and second opposing rigid walls, a sealing membrane sealingly connecting together said walls around their peripheries and permitting movement of said walls towards and away from each other, confronting inner faces of said walls together with said sealing membrane bounding a first chamber, an outer face of said first wall bounding a second chamber, a first restriction of predetermined size connecting said first and second chambers, said second wall being formed with a transfer passage, said inner face of said second wall being provided with a valve seat portion surrounding the end of said transfer passage adjacent to said first wall, a valve member portion of said inner face of said first wall defining with said valve seat portion a second restriction of variable size, and resilient means acting between said walls in the direction to increase the size of said second restriction, whereby an increase in the pressure in said second chamber relative to the pressure in said transfer passage brings about a reduction in the size of said second restriction, one of said inner faces of said walls being formed with a series of recesses extending substantially radially from adjacent to said valve seat.
Specification