Patent ID: 6341621
Filing Date: 2002-01-29
Classification: F15B,Y10T

Abstract:
A bi-stable valve arrangement comprising:a movable body having first and second opposing ends and being constructed and arranged to define a passage between the body and another element, a seal member separate from said body, a first spring structure biasing the seal member in a first direction, and a second spring structure biasing the seal member in a direction opposite said first direction so that said seal member may seal said passage, said first and second spring structures having spring loads such that under certain fluid pressure conditions on said first and second ends of said body, said seal member moves against the bias thereon to permit fluid flow through said passage in one direction, and under different pressure conditions on said first and second ends of said body, said seal member moves against the bias thereon to permit fluid to flow through said passage in a direction opposite said one direction.