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Programmable pump monitoring and shutdown system

  • US 5,772,403 A
  • Filed: 03/27/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 03/27/1996
  • Status: Expired due to Fees
First Claim
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1. A system for monitoring the operation of a high pressure pump including one or more plungers each movable within a respective pumping chamber during a pressurizing pump cycle and a return pump cycle, the pump including a fluid inlet for receiving low pressure fluid, a fluid outlet for discharging high pressure fluid, a fluid inlet check valve for preventing fluid flow from the pumping chamber to the fluid inlet during the pressurizing pump stroke, and a fluid outlet check valve for preventing flow from the fluid outlet to the pumping chamber during the return pump stroke, the system comprising:

  • an inlet fluid pressure sensor for sensing instantaneous fluid pressure upstream from the pumping chamber and generating an electrical signal corresponding to the sensed inlet fluid pressure; and

    a controller responsive to the inlet fluid pressure sensor for generating a fault signal in response to variations between a plurality of instantaneous pressure signals.

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