Multi-Pilot Variable Pressure Relay Valve
OwnerTravis Victor Dean Loeweninventor
Life of this patent
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Abstract
The improved hydraulic control valve includes a spool with a primary side piston having a rigid linkage with a secondary side piston. The primary side providing the ability to tap into an existing hydraulic system without altering the existing hydraulic system pressures or fluid volume. The secondary side piston and associated ports form a regulating assembly for control of the pressures of a hydraulic system and for providing feedback to the primary. The primary and secondary piston sizes may be stepped to create an appropriate amplification ratio for the required secondary brake system pressures in relation to the primary. Multiple secondary pilot signals and multiple primary pilot signals are also envisioned.
Claims20
A multi-pilot variable pressure relay valve device for use with hydraulic systems, the device comprising:
- at least one control spool and at least one control piston connected thereto, the control piston having at least one primary surface in fluid communication with at least one primary signal port and at least one secondary surface in fluid communication with at least one secondary signal port and in substantial fluid isolation from the at least one primary surface, the control piston having a feedback surface in fluid communication with a control pressure port, wherein the primary surface area to feedback surface area ratio establishes a net amplification ratio of a variable pressure relay valve device.
A multi-pilot variable pressure relay valve device for use with hydraulic systems, the device comprising:
- a housing having at least one primary signal port, at least one secondary signal port, at least one control pressure port, and at least one control spool positionable within a bore therein, the control spool having at least one fluid passage therethrough and at least one control piston connected thereto, the control piston having at least one primary surface in fluid communication with the at least one primary signal port and at least one secondary surface in fluid communication with the at least one secondary signal port, the secondary surface in substantial fluid isolation from the primary surface, the control piston having a feedback surface in fluid communication with a control pressure port, wherein the primary surface area to feedback surface area ratio establishes a net amplification ratio of a variable pressure relay valve device.
Dependencies are inferred from the claim text.