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Flow control orifice for parallel flow fluid supply to power steering gear

  • US 5,192,196 A
  • Filed: 03/11/1991
  • Issued: 03/09/1993
  • Est. Priority Date: 03/11/1991
  • Status: Expired due to Term
First Claim
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1. A flow control valve for controlling the flow rate of fluid from a fluid pressure source to a load, comprising:

  • a valve cylinder having a spool slidable therein having first and second pressure surfaces;

    an outlet port through which fluid enters said valve cylinder, said outlet port communicating with the discharge side of the fluid pressure source and the first pressure surface;

    a bypass port communicating with the valve cylinder, admitting therethrough fluid from the outlet port, opened and closed to said cylinder as said spool moves in said cylinder;

    orifice means hydraulically connecting the outlet port and the load, having an inlet end thereof located eccentric of the longitudinal axis of the valve cylinder adjacent the bypass port and an outlet end thereof connected to the load; and

    a pressure feedback passage connecting the outlet end of the orifice means and the second pressure surface.

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