Patents Assigned to Filter Alert Corporation
  • Flow rate threshold sensor
    Patent number: 4747364
    Abstract: A flow rate sensor for use with an air filter channels air flow to energize an audible sound generator upon development of an air pressure differential within the sensor above a settable threshold, which pressure differential results from a reduction in the air flow rate through the air filter due to clogging of the air filter by filtered matter.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: May 31, 1988
    Assignee: Filter Alert Corporation
    Inventor: Barry N. Horowitz