Patents by Inventor Curtis Lee Van Weelden

Curtis Lee Van Weelden has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual setpoint pressure controlled hydraulic valve
    Patent number: 8056576
    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.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: November 15, 2011
    Assignee: HUSCO Automotive Holdings LLC
    Inventor: Curtis Lee Van Weelden
  • DUAL SETPOINT PRESSURE CONTROLLED HYDRAULIC VALVE
    Publication number: 20090057583
    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.
    Type: Application
    Filed: August 26, 2008
    Publication date: March 5, 2009
    Inventor: Curtis Lee Van Weelden