Patent ID: 8899387

Claim:
A valve assembly, comprising: a housing provided with an inlet port, a delivery port, and an exhaust port; a first movable element, a first valve member and a second valve member, the first movable element being engageable with the first valve member, engagement of the first valve member and first movable element substantially preventing flow of fluid between the inlet port and the delivery port, and the first movable element also being engageable with the second valve member, engagement of the second valve member with the first movable element substantially preventing flow of fluid between the delivery port and the exhaust port; and a second movable element which divides the housing into a control chamber and a main chamber and which is movable relative to the housing under the influence of fluid pressure in the control chamber and main chamber, wherein the first valve member extends from the housing towards the first movable element through an aperture provided in the second movable element.