Patents Assigned to C. W. Lisk Company, Inc.
  • Patent number: 5318354
    Abstract: An electrically actuated valve for regulating a working pressure of a closed volume load includes an inlet valve (24) for controlling fluid flow between a supply port (16) and a working port (18) and an outlet valve (26) for controlling fluid flow between the working port (18) and an exhaust port (20). A solenoid actuator (70) applies an adjustable force to a movable valve element (44) for closing the outlet valve (26) and opening the inlet valve (24). The adjustable force is opposed by a reactionary force that is generated by the working pressure. The movable element (44) includes opposing areas exposed to the working pressure for scaling the reactionary force to the working pressure.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: June 7, 1994
    Assignee: C. W. Lisk Company, Inc.
    Inventor: Jeffery A. Tyler