Patents Assigned to Wymark Ltd.
  • Gas-operated, dual-chamber, fluid lubricating material dispenser having a pressure relief valve
    Patent number: 5992706
    Abstract: An automatic dispenser of fluent lubricating material comprising a first chamber (23) for containing the fluent lubricating material, a second chamber (13), means for generating gas within the second chamber and pressure relief means (11, 15, 16; and 21, 24-28) for venting the first chamber to atmosphere on occurrence of an over-pressure.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: November 30, 1999
    Assignee: Wymark Ltd.
    Inventors: Denis A Patterson, Geoffrey O Patterson