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PUMP END OF STROKE SENSOR

  • US 20100196168A1
  • Filed: 05/15/2009
  • Published: 08/05/2010
  • Est. Priority Date: 01/30/2009
  • Status: Abandoned Application
First Claim
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1. A prime mover comprising:

  • a shaft assembly supported for reciprocal movement between first and second ends of a stroke, the shaft assembly include first and second portions having a first material and a third portion in between the first and second portions having a second material different from the first material; and

    a single inductive proximity sensor making a first indication in response to being proximate the first material and making a second indication different from the first indication in response to being proximate the second material;

    wherein a portion of the single inductive proximity sensor is proximate the first portion of the shaft assembly when the shaft is at the first end of the stroke;

    wherein the same portion of the same single inductive proximity sensor is proximate the second portion of the shaft assembly when the shaft is at the second end of the stroke; and

    wherein the same portion of the same single inductive proximity sensor is proximate the third portion of the shaft assembly the entire time the shaft is in between the first and second ends of the stroke.

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