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Probe for sensing movement in a compressor system

  • US 6,657,217 B2
  • Filed: 04/10/2001
  • Issued: 12/02/2003
  • Est. Priority Date: 04/10/2001
  • Status: Expired due to Fees
First Claim
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1. A position sensor to detect when a part in a pressurized space has worn beyond a preselected clearance comprising:

  • a probe tube having an internal cavity, at least a portion of the outer surface of the probe being positioned in the pressurized space and proximate to but spaced from the part, when the part has not worn beyond the preselected clearance;

    a pressure sensor in fluid communication with the interior cavity of the probe to detect the pressure within the cavity; and

    an apparatus for permitting the position sensor to communicate with a device to indicate when the sensed pressure changes beyond a predetermined amount, indicating that the part has moved beyond a preselected clearance;

    whereby, when the part wears beyond its preselected clearance, it engages at least a portion of the probe, breaches the probe, and permits pressurized fluid to enter the internal cavity of the probe and activate the sensor.

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