Patent ID: 8876083

Claim:
A valve comprising: a first member having a first port therethrough; a second member in operable communication with the first member having a sealing surface thereon and a second port therethrough being movable relative to the first member; a seal sealingly engaged with the first member and slidably sealingly engagable with the second member, the valve being in a open position when the first port and the second port are on a same side of the seal and a closed position when the first port and the second port are on differing sides of the seal; and a support member movably disposed relative to the first member and the second member having a support surface dimensioned similarly to the sealing surface, the support member being movable with the second member relative to the first member so that while moving the second member relative to the first member to move the vale between the open position and the closed position the seal is continuously fully supported by at least one of the sealing surface and the support surface.