Patent ID: 6802791
Filing Date: 2004-10-12
Classification: F15B,F16D,F16K,G05D,Y10T

Abstract:
A pressure control valve assembly, comprising:an intermediate member separating a first area of high pressure with a second area of low pressure; a bore defining a blind hole extending from said first area to said second area to provide fluid communication therebetween; a groove which partially intersects the blind hole, said groove being disposed on a high pressure side of said intermediate member, said groove extending along a length of said bore from said first area to said blind hole; a ball member seated in the blind hole, said ball member disposed on a low pressure side of said intermediate member; and a spring resiliently acting on the ball member to apply a force biasing the ball into the blind hole, wherein at an intersection of the blind hole and groove, an area is formed that provides a controlled leakage path for the hydraulic fluid when said ball member is seated in said blind hole, wherein as flow of the hydraulic fluid increases, hydraulic pressure of the fluid on the first area of high pressure increases which increases the force on the ball acting against the spring, and wherein fluid disposed in said first area of high pressure actuates a limited slip device within a differential gear assembly.