PRESSURE TRANSDUCER - MATSUSHITA ELECTRIC WORKS LTD

Title:

PRESSURE TRANSDUCER

Document Type and Number:

WIPO Patent Application WO/1980/000037

Kind Code:

A1

Abstract:

The pressure transducer of this invention comprises a bellows made of two sheets of diaphragm plates which have concentric top and bottom portions and are of a radially continued wave form and adhered to one another at the peripheral edges thereof, a differential transformer having a plunger shaft connected to one end of the bellows, and a case fixedly supporting an air intake tube protruted from the other end of the bellows and containing therein the bellows and the transformer. The amplitude of the waveform of each of the diaphragm plates is sequentially enlarged towards the peripheral edge thereof. Two or more such bellows are employed to reduce the size of the transducer, and to enhance the accuracy of the transducer, particularly used as a blood pressure measuring instrument.

Inventors:

HAYASHI K (JP)
TERASHIMA O (JP)
ICHINOMIYA T (JP)

Application Number:

PCT/JP1979/000144

Publication Date:

January 10, 1980

Filing Date:

June 07, 1979

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC WORKS LTD (JP)
HAYASHI K (JP)
TERASHIMA O (JP)
ICHINOMIYA T (JP)

International Classes:

G01L7/06; G01L7/10; G01L9/00; (IPC1-7): G01L7/10; G01D5/22; G01L9/10; G12B1/04

Foreign References:

JPH1017023Y
JPS4719039Y1	1972-06-29
JPS344403B1
JPS361246B1
JPS3612394B1

Other References: