Surgery – Truss – Pad
Patent
1980-08-14
1982-04-06
Michell, Robert W.
Surgery
Truss
Pad
272 99, A61B 508, A63B 2300
Patent
active
043230784
ABSTRACT:
A collapsible respiratory exercising device for measuring the volume of air inhaled by the user. The device comprises a rigid upper plate, an orifice through the plate, an inhalation tube connected to the orifice, a tubular bellows attached beneath the plate and in communication with the orifice and tube, a lower plate attached to the lowermost end of the bellows which has sufficient mass to cause the bellows to fully expand, and measuring means with calibrated indicia attached to the upper plate for determining the change in volume of the bellows after inhalation, thereby indicating the amount of air that has been inhaled.
REFERENCES:
patent: 225710 (1880-03-01), Marsh
patent: 3316903 (1967-05-01), Richards
patent: 3467078 (1969-09-01), Bird et al.
patent: 4096855 (1978-06-01), Flemn
patent: 4241740 (1980-12-01), Brown
Hanley John E.
Michell Robert W.
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