Patent ID: 8281812
Filing Date: 2012-10-09
Classification: F16K,Y10T

Abstract:
1. A device for controlling the flow of fluid comprising: a. a rotor having a rotor fluid communication means and a rotor load bearing surface which rotor load bearing surface sealably engages a stationary load bearing surface, said rotor capable of assuming a first position and a second position by rotation; b. at least one stator having said stationary load bearing surface having stator fluid communication means, said stationary load bearing surface sealably engaging said rotor load bearing surface and permitting rotation of said rotor with respect to said stator; at least one of said rotor bearing surface and said stationary load bearing surface having a diamond-like carbon-silica coating; c. compression means for holding said at least one stator and rotor with said rotor load bearing surface and stationary load bearing surface sealably engaged, and said diamond-like carbon-silica coating providing a low friction and increased hardness allowing repeated movement between said first and second positions.