Patents Assigned to Ernst Wirz
  • Control valve set for a completely pneumatical low- and operation pressure control
    Patent number: 4356842
    Abstract: A pneumatic control valve for a fully pneumatic system for controlling both the low pressure and working pressure sides of a pneumatic installation. The valve mechanism is designed to increase the switching frequency of the mechanism.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: November 2, 1982
    Assignee: Ernst Wirz
    Inventor: Willy Gassert