INVALIDATION OF HYDRAULIC LATCHING PIN VALVE

摘要

PROBLEM TO BE SOLVED: To provide a valve invalidation device assembly capable of appropriately locking an inside main body member with an outside main body member with a latch and releasing the lock without arranging the inside main body member in a special rotating direction in relation to the outside main body member. SOLUTION: A latch assembly has a nearly annular inner groove 69 provided with an annular latch surface 71 and an outside main body member 17 formed with at least one fluid port 67 communicated with the annular inner groove 69 so as to flow the fluid and communicated with a pressurized flow source so as to flow the fluid. A latch member 63 is directed in nearly parallel with the latch surface 71 and formed with a nearly plane stopper surface 75 arranged so as to be engaged with the latch surface 71 when the latch member 63 is latched. With this structure, the inside main body member 19 can be desirably rotated in relation to the outside main body member 17.