The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2003
Filed:
Mar. 08, 2002
Joseph Fisher, Thornhill, Ontario, CA;
Alex Vesely, Toronto, Ontario, CA;
Hiroshi Sasano, Nagoya, Aichi 465 0064, JP;
Steve Iscoe, Kingston, Ont., CA;
Alex Stenzler, Long Beach, CA (US);
Other;
Abstract
A portable isocapnia circuit and an isocapnia method. A breathing port of the circuit allows a subject to inhale and exhale. Connected to the breathing port, a bifurcate conduit has a first conduit branch and a second conduit branch. The first conduit branch has an atmospheric air inlet, from which the atmospheric air is provided for inhalation, an inspiratory check valve to allow a one-way flow of the atmospheric air, and an atmospheric air aspirator. The second conduit branch has a one-way expiratory check valve and a expiratory gas reservoir. A one-way check valve is used to interconnect the first and second conduit branch, from which the expiratory gas stored in the expiratory gas reservoir flows to the first conduit branch to mix with the atmospheric air when the minute ventilation exceeds the atmospheric air.