Spirometers

Details Spirometers Spirometers

1979-10-16

1981-10-27

Cohen, Lee S.

Surgery

Truss

Pad

346 72, A61B 508

Patent

active

042967589

ABSTRACT:
A spirometer having an inflatable bellows 2, is provided with a movable member 15 which runs along a track 16. By adjusting parts 17, the configuration of the track is set locally to give a variable resistance to movement of member 15 and, consequently, inflation of the bellows 2. Calibration is achieved in a simple manner by adjusting parts 17 as the bellows is inflated progressively with measured amounts of air. Adjustments made correctly are not upset by adjustments made later in the calibration operation.

REFERENCES:
patent: 2999495 (1961-09-01), Shipley
patent: 3086515 (1963-04-01), Jones
patent: 3363260 (1968-01-01), Garbe
patent: 3653374 (1972-04-01), Talonn et al.

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