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Hydraulic heater valve

  • US 8,881,992 B2
  • Filed: 03/28/2011
  • Issued: 11/11/2014
  • Est. Priority Date: 05/10/2010
  • Status: Active Grant
First Claim
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1. A valve assembly including:

  • a housing having an inlet for receiving fluid and first and second outlets for delivering the fluid from the valve assembly;

    thermal and priority valve members shiftable in the housing; and

    a sleeve disposed in the housing that guides the thermal and priority valve members;

    wherein the thermal valve member is shiftable by first and second springs between a first position permitting fluid flow from the inlet to the priority valve member and a second position blocking fluid flow, at least one of the springs being responsive to temperature changes of fluid flowing through the housing,wherein the priority valve member is shiftable against a biasing force by pressure at the inlet above a predetermined pressure, the priority valve member being shiftable between a first position blocking flow from the inlet to the second outlet and a second position permitting flow, andwherein the sleeve includes a first opening for receiving fluid from the thermal valve member when the thermal valve member is in the first position, a second opening communicating with the first opening, a third opening communicating with the second opening, and an annulus communicating with the first and second openings.

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