초록

A sleeve valve comprising an elastomer sleeve folded onto itself, the two peripheral ends being fixedly held so that an integral control chamber is created, an opening being provided in said chamber for connecting it to a control pressure source, no housing being required.

대표청구항 ▼

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 o

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.