Patents Assigned to COE Corporation
  • Plural diaphragm valve
    Patent number: 4794940
    Abstract: A diaphragm valve for controlling fluid flow. The valve contains a first and second diaphragm and a piston therebetween. The piston cooperates with the diaphragms controlling their movement within predetermined limits. The piston is preferably limited in travel to limit pressure applied to one diaphragm by means of a mating seat disposed between the diaphragms.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: January 3, 1989
    Assignee: COE Corporation
    Inventors: Robert J. Albert, Paul P. Martyn