Patents Assigned to Dynair Limited
  • Automatic control valves
    Patent number: 4176630
    Abstract: The invention provides a pneumatic control system for a pneumatically operated clutch in the drive to a cooling fan of a vehicle engine. There are two thermostat valves arranged in series in the pneumatic control line. One valve is positioned in the supercharged air passage and the other valve is in the liquid coolant passage. If the temperature at either valve becomes excessive the supply line 22 is connected to relief and the fan clutch automatically engages.
    Type: Grant
    Filed: June 1, 1977
    Date of Patent: December 4, 1979
    Assignee: Dynair Limited
    Inventor: Arthur E. H. Elmer