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Sleeve valve with integral control chamber

  • US 4,662,598 A
  • Filed: 12/31/1984
  • Issued: 05/05/1987
  • Est. Priority Date: 12/02/1982
  • Status: Expired due to Fees
First Claim
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1. A sleeve valve comprising a generally circular elastomer sleeve folded onto itself to define an annulus, said sleeve having two peripheral ends, said ends being fixedly held in at least partial sealed engagement so that an integral control chamber is created within said annulus, means providing an opening in said chamber for connecting said chamber to a control pressure source, and an inner wall of the annulus including portions adapted to close together when said chamber is pressurized to seal the valve, said portions closing together at a position including a plane axially spaced downstream from any position between said peripheral ends.

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