A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
73/124
A61B 5/08 (2006.01)
Patent
CA 1293870
ABSTRACT A lightweight and portable volumetric spirometer for measuring the volume of and rate of flow of air inhaled by human lungs. The device includes a movable piston within a first transparent cylindrical chamber provided with calibrated markings along its surface for measuring the volume of air withdrawn from the chamber. The first chamber communicates with a breathing tube assembly through which the user inhales. The breathing tube assembly is uniquely adapted so that the inhaled air flow is divided into two fixed portions, one portion of which comes from a chamber J the other portion of which comes from a second chamber communicating with the outside atmosphere. As air is inhaled, the piston rises to a height that can be related to the total volume inhaled. Preferably, there is a counterweight in the second chamber which also rises during inhalation to counter balance the resistance to movement of the piston and which gives an indication of the rate of inhalation.
615606
Chernak Milton
Greenberg Mishel
Smyers William H. Jr.
Chernak Milton
Chesebrough-Pond's Inc.
Gowling Lafleur Henderson Llp
Greenberg Mishel
Sherwood Services Ag
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