| 摘要 |
<p>A restriction valve device for hydraulic pressure fluid in a vehicle shock absorbing mechanism comprises a valve seat member with at least one main opening for the passage of said pressure fluid, said main opening being closable by means of a movable spring-biased valve body, and at least one auxiliary opening for the pressure fluid, said auxiliary opening being selectively closable by a closure element. To provide for a fast and reliable change or control of the functional characteristics of the damper, yet making same inexpensive and uncomplicated, a closed variable space is confined between the valve seat member and the valve body, the auxiliary opening being connected with said space so as to admit when the closure element is open, the pressure fluid thereinto and thus apply also the pressure of said fluid onto said valve body to effect an increased pressure force on said body against the force of the biasing spring so as to change the functional characteristics of the restriction valve device.</p> |
