Patent ID: 6659130
Filing Date: 2003-12-09
Classification: E02F,F16L,Y10T

Abstract:
A coupling arrangement for resisting fluid leakage during coupling and decoupling of a pair of flat-faced components having internal passages for carrying hydraulic fluid under pressure, the arrangement comprising:a) a stationary bushing fixedly mounted in one of the components, the bushing having a bushing stop; b) a first displaceable member extending along an axis and mounted in said one component for axial displacement, the first displaceable member having a first abutment; c) a second displaceable member extending along the axis and mounted for sliding movement on, and in a telescoping relationship with, the first displaceable member, the second displaceable member having a second abutment; and d) a third displaceable member extending along the axis and mounted for sliding movement on, and in a telescoping relationship with, the second displaceable member, the third displaceable member being axially moved by the other of the components during coupling to engage the second abutment and, in turn, to axially move the second displaceable member to engage the first abutment and, in turn, to axially move the first displaceable member away from the bushing stop, thereby bringing the internal passages in fluid communication.