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Point of lube monitor

  • US 5,126,722 A
  • Filed: 02/04/1991
  • Issued: 06/30/1992
  • Est. Priority Date: 02/04/1991
  • Status: Expired due to Term
First Claim
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1. A flow sensing device comprising:

  • a barrel having a discharge aperture at a first end;

    a bushing having an inlet at one end and a cylinder section at an opposite end, said cylinder section having at least one port piercing a side wall thereof, said bushing having a flow channel from said inlet to said port, said cylinder section terminating in an open end within said barrel;

    said bushing sealingly mounted to said barrel with said cylinder section extending inside said barrel;

    a magnetic piston reciprocally housed inside said cylinder section, said piston and said cylinder section sized in length for said piston to protrude at a first end outwardly of said open end of said cylinder section;

    a means for biasing said piston into a first position along an axis of said cylinder section, covering said port; and

    a magnetic sensing means mounted to said barrel and in magnetic communication through said barrel with said magnetic piston for registering a signal corresponding to the movement of said magnetic piston in said cylinder section.

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