Spirometer

Details Spirometer Spirometer

1973-12-28

1976-04-13

Howell, Kyle L.

Surgery

Truss

Perineal

272 57F, A61B 508

Patent

active

039497372

ABSTRACT:
A device for testing lung function has a body with two chambers axially separated by a partition. An impeller is rotatably mounted in a first one of the chambers on a shaft extending through the partition into both chambers. An air inlet leads into the first chamber so that air can be blown into the chamber tangentially on to the impeller thereby to rotate the impeller. A reduction gear arranged in the second chamber and is driven by the shaft. An indicator is driven by the reduction gear to indicate the number of revolutions of the impeller.

REFERENCES:
patent: 767522 (1904-08-01), Lyttleton
patent: 829232 (1906-08-01), Reeves
patent: 966050 (1910-08-01), Ramage
patent: 2098280 (1937-11-01), Dornseif
patent: 2427145 (1947-09-01), Koehler et al.
patent: 2837083 (1958-06-01), Lanooy

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