| 摘要 |
<p>A control valve apparatus, for fluid actuated systems comprises a housing having supply passage means for supplying source fluid and action passage means for supplying a work-performing fluid: an adjustable valve assembly within said housing at a location between said supply passage means and said action passage means, said valve assembly comprising a pair of cooperating valve members individually rotatable about a common axis, one said valve member being a driver member and the other a follower member: means for effecting rotation of said driver member independently of said follower member to move the valve members out of a neutral position, in which no through passages are formed between said supply passage means and said action passage means, to a position in which fluid passage is formed through said valve assembly, and reactive damming means fed by a metered portion of fluid passing through said valve assembly for effecting subsequent followup rotation by said follower member, thereby to reform said neutral position after termination of said driver member rotation.</p> |
