Spirometer

Details Spirometer Spirometer

1977-12-27

1980-01-08

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Tank type

G01F 107, G01F 108

Patent

active

041821750

ABSTRACT:
A turbine is mounted in an annular cavity, and is provided peripherally with exhaled air, which is exhausted axially therefrom. A fixed stator has axially extending, chordally penetrating slots therein, and a calibrating ring adjustable for partial occlusion of the slots. The rotor within the stator rides on jeweled bearings, and comprises fiberglass sheets bonded to the shaft and extending outwardly therefrom. Turns of the rotor are coupled to a stopwatch-type accumulator mechanism by substantially colinear, bent interfering shafts which define a low friction low inertia universal joint. The stopwatch accumulator is readily detachable for sterilization of the turbine/housing portion.

REFERENCES:
patent: 314480 (1885-03-01), Rosenkranz et al.
patent: 864579 (1907-08-01), Volz
patent: 1702762 (1929-02-01), Brubaker
patent: 2960074 (1960-11-01), Zavada
patent: 3382716 (1968-05-01), Struck
patent: 3435679 (1969-04-01), Davis
patent: 3442126 (1969-05-01), Southall
patent: 3572118 (1971-03-01), Hilzendegen
patent: 3903742 (1975-09-01), Colton
patent: 3922525 (1975-11-01), Kozak
patent: 3949606 (1976-04-01), Blancett

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