Patent ID: 7571738
Filing Date: 2009-08-11
Classification: B60T,F16K,Y10T

Abstract:
1. A flow control device, comprising: a housing assembly including a first seat area circumscribing a first port and a second seat area circumscribing a second port; and a movable member disposed between said first port and said second port, said movable member having a body portion extending along an axis and a flexible rim, wherein the flexible rim has an outer edge that is thinner than an inner portion of the rim, and wherein said movable member moves between sealing engagement with said first seat area and sealing engagement with said second seat area in response to a pressure differential across said movable member; wherein the body portion of the movable member is received inside a central passage in the housing assembly to maintain a substantially uniform radial clearance between the outer edge of the flexible rim and an inner surface of the housing assembly as said movable member moves between sealing engagement with said first seat area and sealing engagement with said second seat area, and wherein the flexible rim extends radially outward of said central passage.