Patents Represented by Attorney Ernie E. Helms
  • Patent number: 5018353
    Abstract: A dual chamber master cylinder has a center compensating valve for bypass compensation of the secondary pressurizing chamber, eliminating lip seal damage to the secondary piston seal that can occur when a bypass port is provided in the wall of the secondary pressurizing chamber.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: May 28, 1991
    Assignee: General Motors Corporation
    Inventor: Cecil C. Pugh