Patents Assigned to Sherwood Products Corporation
  • Apparatus for monitoring the condition of a filter
    Patent number: 3934543
    Abstract: An apparatus for monitoring the condition of a fluid filter comprises a flexible diaphragm exposed to the upstream, downstream or differential pressure acting on the filter and indicator means for monitoring the condition of the filter as a function of movement of the diaphragm in response to said pressures. A unique, low friction indicator mechanism, means for adjusting the sensitivity of the device and means for resetting the device are also disclosed.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: January 27, 1976
    Assignee: Sherwood Products Corporation
    Inventor: Durrell U. Howard