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Disposable pneumotachograph flowmeter

  • US 5,357,972 A
  • Filed: 05/17/1993
  • Issued: 10/25/1994
  • Est. Priority Date: 05/17/1993
  • Status: Expired due to Term
First Claim
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1. A pneumotachograph flowmeter comprising:

  • (a) a tubular mouthpiece member having a lumen extending the length thereof;

    (b) a fabric screen of expanded, PTFE fibers extending transverse to said lumen and having a multiplicity of pores, the size providing a predetermined resistance to fluid flow therethrough with the flow being laminar through said lumen; and

    (c) pressure sensing ports in said mouthpiece member disposed on opposite sides of said screen.

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