Patents Assigned to Protection, Inc.
  • Breathing valve
    Patent number: 4428392
    Abstract: A breathing valve for the selective entry of a gas to be inhaled and for the exit of exhaled gas, which utilizes a rolling diaphragm and flapper valves for its workings which are quiet and are constructed so as to be unlikely to freeze up or become sticky.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: January 31, 1984
    Assignee: Protection, Inc.
    Inventors: Leon Jones, Orland W. Wilcox