Title:
FLOWMETER
Document Type and Number:
Japanese Patent JPS52140362
Kind Code:
A
Abstract:
A flow meter particularly for receiving respiratory flows for pulmonary function diagnoses has a perforated piezo-ceramic flow resistance element and transducer in a flow tube for providing a highly-sensitive flow measurement with little resistance to the flow. Electric contact plates abut opposite planar faces of the piezo-ceramic material plate and are spaced apart at the periphery of the piezo-ceramic plate by an insulating disk. Frame members carry the piezo-ceramic plate and electric contact plates and are spaced and protected within a housing of the flow meter by soft, floating seal members. Contact lugs connected to the electric contact plates conduct signals from the meter which are a function of the bending of the piezo-ceramic material plate under the differential flow pressures on an upstream and a downstream side of the piezo-ceramic plate.
Inventors:
KENTO NIRUSON
OROFU EKUSUTOREEMU
OROFU EKUSUTOREEMU
Application Number:
JP5481477A
Publication Date:
November 22, 1977
Filing Date:
May 12, 1977
Export Citation:
Assignee:
SIEMENS AG
International Classes:
A61B5/08; A61B5/087; G01F1/34; G01F1/36; G01F1/40; (IPC1-7): A61B5/08; G01F1/34