Patents Assigned to Stevens Pump Company
  • Differential pressure switch
    Patent number: 7855345
    Abstract: The invention relates to a field adjustable pressure switch that incorporates a manually adjustable differential to set the pressure level for the trip point for the pressure switch used in conjunction with a submersible sump pump system requiring trip levels corresponding to the desired water level in the sump well for operation of the pump motor.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: December 21, 2010
    Assignee: Stevens Pump Company
    Inventors: James E. Stevens, Geoffrey M. Stevens, Bill Irwin, Leung Wai Tat Raymond