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Pneumotach

  • US 5,060,655 A
  • Filed: 11/15/1988
  • Issued: 10/29/1991
  • Est. Priority Date: 11/15/1988
  • Status: Expired due to Fees
First Claim
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1. In a pneumotach apparatus for measuring flows of gases and including a head having a flow passageway therethrough with a pair of hose receiving tube adaptors extending outwardly from opposite ends thereof and a plurality of flow measuring foraminous members positioned so as to extend across the passageway, the improving comprising wherein:

  • (a) each of said tube adaptors has a passageway passing therethrough;

    each of said passageways having an inner end and an outer end;

    (b) both of said tube adaptor passageway inner ends terminating in a circular knife edge surrounding both of said passageway and the gas when passing through said passageway;

    (c) each of said passageway inner ends being in a plane positioned so as to be parallel to and less than 30 thousands of an inch from a respective one of said foraminous members, so as to reduce gaseous turbulence at said foraminous members.

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