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Respiratory stimulator & methods of use

  • US 5,647,345 A
  • Filed: 06/07/1995
  • Issued: 07/15/1997
  • Est. Priority Date: 05/12/1992
  • Status: Expired due to Fees
First Claim
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1. A respiratory stimulator, includinga rigid mixing chamber where the contents of the chamber include exhaled air and fresh air which are mixed together by the breathing of a user, said chamber not varying substantially in volume in response to exhalation and inhalation of the user,a breathing port in the chamber which provides communication between the user and the mixing chamber, upon exhalation of the user, exhaled air entering the chamber as a jet stream to create turbulence within the chamber and being entrapped in the chamber and mixed with the contents of the chamber, and, upon inhalation of the user, a portion of the contents of the chamber being drawn through the breathing port, anda vent opening structure in the chamber for providing communication between the mixing chamber and the atmosphere, upon exhalation of the user, a portion the contents of the chamber substantially equal to the volume of air exhaled by the user being exhausted to the atmosphere through the vent opening structure, and upon inhalation of the user, fresh air as a jet stream substantially equal to the volume of air inhaled by the user being introduced into the chamber through the vent opening structure,said vent opening structure having a sufficiently large cross-sectional area to allow that portion of the contents of the chamber being exhausted to flow freely out of the chamber as the user exhales into the chamber without substantially increasing the pressure within the chamber yet being sufficiently restrictive to promote turbulent mixing in the chamber of the contents of the chamber and fresh air drawn into the chamber upon inhalation.

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