Dual setpoint pressure controlled hydraulic valve
AssigneeHUSCO Automotive Holdings LLC
InventorCurtis Lee Van Weelden
Life of this patent
Estimating the term…
Abstract
A hydraulic valve has a valve body with a bore into which an inlet port, an outlet port, and a workport all open. A valve spool is slideably received within the bore. The valve spool has a first position that provides a path between the inlet port and the workport, and a second position that provides another path between the outlet port and the workport. Inlet port pressure tends to move the valve spool into the first position and outlet port pressure tends to move the valve spool into the second position. A linear actuator is coupled to the valve spool by a spring, thereby biasing the valve spool toward the first position. Another spring biases the valve spool toward the second position.
Claims20
A hydraulic valve comprising:
- a valve body with a bore and having an inlet port, an outlet port and a workport in communication with the bore;
- a valve spool slideably received within the bore of the valve body and selectively connects the inlet port and the outlet port to the workport in different positions of the valve spool in the bore, wherein pressure in the inlet port tends to move the valve spool in a first direction in the bore and pressure in the outlet port tends to move the valve spool in an opposite second direction in the bore;
- a linear actuator adjacent the valve body;
- a first spring biasing the valve spool with respect to the valve body in one of the first and second directions;
- and
- a second spring extending between and coupling the linear actuator and the valve spool, and biasing the valve spool in another one of the first and second directions.
A hydraulic valve comprising:
- a valve body with a bore and having an inlet port, an outlet port and a workport in communication with the bore;
- a valve spool slideably received within the bore of the valve body and having a first position in which a path is provided between the inlet port and the workport and having a second position in which another path is provided between the outlet port and the workport, wherein pressure in the inlet port tends to move the valve spool into the first position and pressure in the outlet port tends to move the valve spool into the second position;
- a linear actuator adjacent the valve body;
- a first spring biasing the valve spool toward the second position;
- and
- a second spring extending between and coupling the linear actuator and the valve spool and biasing the valve spool toward the first position.
A hydraulic valve comprising:
- a valve body with a bore and having an inlet port, an outlet port and a workport in communication with the bore;
- a valve spool slideably received within the bore of the valve body and having a first position in which a path is provided between the inlet port and the workport and having a second position in which another path is provided between the outlet port and the workport, wherein pressure in the inlet port tends to move the valve spool into the first position and pressure in the outlet port tends to move the valve spool into the second position;
- an actuator having a solenoid coil assembly with a coil aperture formed therein, an armature slideably received in the coil aperture, a push pin affixed to the armature, and a bushing engaging the push pin;
- a first spring biasing the valve spool toward the second position;
- and
- a second spring extending between and engaging the bushing and the valve spool, and biasing the valve spool toward the first position.
Dependencies are inferred from the claim text.