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US 6,651,636 B1Granted
Pressure regulating piston with built-in relief valve
AssigneeASCO Controls, LP
InventorJohn Edward Albright
Life of this patent
Estimating the term…
Abstract
A pressure-regulating valve particularly useful in a diesel internal combustion engine with a closed crankcase is provided. The valve includes a body coupled to a bonnet with an internal movable piston. The movable piston maintains a substantially constant pressure in the crankcase by adjusting a fluid flow in response to changes in pressure. The movable piston also includes an integral relief valve to prevent overpressure in the event of a crankcase pressure in excess of the designed limits of the pressure-regulating valve.
Claims26
A pressure regulating valve comprising:
- a first body portion in fluid communication with a crankcase;
- a second body portion isolated fluidly from the first body portion and having a fluid passageway therethrough in communication with the crankcase and a vacuum source;
- a movable piston disposed within the first body portion;
- wherein the piston is movable in response to pressure thereon to adjust a fluid flow through the fluid passageway;
- and
- a spool connected to the piston and extending through the first body portion and to the second body portion.
3 more elements
A pressure regulating valve comprising:
- a chamber connectable to a first variable pressure source;
- a passageway isolated from the chamber and connectable to the first source and to a second variable pressure source;
- a pressure member disposed within the chamber and movable in response to a force differential created by the first source;
- a flow proportioning member connected to the pressure member and movable therewith, a portion of the flow proportioning member positioned in the passageway for adjusting flow of a fluid between the first source and the second source;
- and
- a relief valve integral to the pressure member and relieving pressure from the first source at a predetermined level.
3 more elements
A pressure regulating valve comprising:
- a chamber connectable to a first variable pressure source;
- a passageway isolated from the chamber and connectable to the first source and to a second variable pressure source;
- a pressure member disposed within the chamber and movable in response to a force differential created by the first source;
- and
- a flow proportioning member connected to the pressure member and movable therewith, a portion of the flow proportioning member positioned in the passageway for adjusting flow of a fluid between the first source and the second source,
- wherein the portion of the proportioning member defines one or more fins.
3 more elements
A pressure regulating valve comprising:
- a chamber connectable to a first variable pressure source, wherein the first source is a crankcase of an internal combustion engine;
- a passageway isolated from the chamber and connectable to the first source and to a second variable pressure source;
- a pressure member disposed within the chamber and movable in response to a force differential created by the first source;
- and
- a flow proportioning member connected to the pressure member and movable therewith a portion of the flow proportioning member positioned in the passageway for adjusting flow of a fluid between the first source and the second source.
2 more elements
A pressure regulating valve comprising:
- a chamber connectable to a first variable pressure source;
- a passageway isolated from the chamber and connectable to the first source and to a second variable pressure source, wherein the second source is a manifold of an internal combustion engine;
- a pressure member disposed within the chamber and movable in response to a force differential created by the first source;
- and
- a flow proportioning member connected to the pressure member and movable therewith, a portion of the flow proportioning member positioned in the passageway for adjusting flow of a fluid between the first source and the second source.
2 more elements
A pressure regulating valve comprising:
- a first portion connectable to a first variable pressure source;
- a pressure member disposed within the first portion and movable in response to a force differential created by the first source;
- valve means on the pressure member for relieving pressure from the first source at a predetermined level;
- a second portion isolated from the first portion and connectable to the first source and a second variable pressure source;
- and
- means within the second portion and connected to the pressure member for adjusting flow of a fluid between the first source and the second source.
3 more elements
Dependencies are inferred from the claim text.