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Encoding and sensing of syringe information

  • US 8,821,450 B2
  • Filed: 10/19/2005
  • Issued: 09/02/2014
  • Est. Priority Date: 01/18/2001
  • Status: Expired due to Fees
First Claim
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1. A syringe encoder comprising:

  • a length of material adapted to propagate electromagnetic energy emitted from an electromagnetic energy source incident on a syringe in a direction substantially parallel to a longitudinal axis of the syringe; and

    at least two indicators positioned along the length of material,wherein each of the at least two indicators is located at a different longitudinal position along the length of material,wherein each of the at least two indicators have a reflective surface adapted to reflect the electromagnetic energy,wherein the reflective surface of the at least first indicator is a different depth than the reflective surface of the at least second indicator,wherein each of the at least two indicators is adapted to interact with at least a portion of the electromagnetic energy and reflect the electromagnetic energy radially from the length of material such that reflected energy is detectable by a sensor thereby providing information about one or more parameters.

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