Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 10, 2008
0Patent Application Number
116858460
Date Filed
March 14, 2007
0Patent Primary Examiner
Patent abstract
A control valve assembly includes a first control valve and a second control valve longitudinally mounted to the first control valve. A first check valve and a second check valve respectively disposed in the first control valve and the second control valve such that the leakproof effect of the control valve assembly is doubled.
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