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Therapeutic gas flow meter and monitor

  • US 5,911,219 A
  • Filed: 04/18/1997
  • Issued: 06/15/1999
  • Est. Priority Date: 04/18/1997
  • Status: Expired due to Fees
First Claim
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1. A flow meter having a body, an inlet operatively connected to a source of gas, an outlet, and a valve for opening and closing the outlet, the valve including a valve seat, valve shaft movable axially relative to said outlet and a valve member provided on said valve shaft, said valve member movable between a first position in which said valve member engages said valve seat to close said outlet and a second position in which said valve member is spaced from said valve seat to allow gas to pass through said outlet;

  • said flow meter further including a sensor which senses the position of said valve member relative to said valve seat and generates a signal indicative of said position;

    said sensor comprising a potentiometer having a rotatable shaft, said valve shaft being coupled to said potentiometer shaft such that said valve shaft will translate axially without moving said potentiometer, said potentiometer generating a signal indicative of the rotational position of said valve shaft, and hence of the setting of the valve member.

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