Spirometers
US4282883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1979 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Jun 25, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spirometer having a turbine transducer which includes a plurality of blades past which exhaled or inhaled air can be blown on sucked to cause a degree of rotation of the blades in proportion to the volume of air passing at a speed proportional to the rate of flow of the air. The turbine transducer produces a series of electrical pulses preferably by an electro-optical sensor at a rate proportional to the rate of rotation of the blade and these are fed to a microprocessor which stores and processes pulses and displays information relating to pulmonary functions calculated in the microprocessor. It is preferred that the turbine transducer is housed in a body that can be held in the hand of and raised to the mouth of a patient and is constructed in such a manner and of such materials as to make it readily dismountable for cleaning while responding quickly and accurately to changes in the rate of flow of exhaled or inhaled air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.