Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1987-10-19
1989-05-09
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73756, G01L 708, G01L 1302
Patent
active
048277720
ABSTRACT:
A differential pressure sensing means and method includes an inlet receiving a fluid having a first pressure. Another inlet receives a fluid having a second pressure. A plurality of pressure sensing devices are connected to the first and second inlets. Each pressure sensing device senses a pressure differential within a different predetermined range of pressures and provides a pressure signal representative thereof. An output circuit connected to the plurality of pressure signals provides a pressure signal selected from one of the signals provided by the plurality of pressure sensing devices so as to provide a pressure signal representative of the pressure difference between the first and second pressures of the fluids.
REFERENCES:
patent: 2562494 (1951-07-01), Hejduk
patent: 3118305 (1964-01-01), Weeks
patent: 3524341 (1970-08-01), Roy
patent: 4512179 (1985-04-01), Umble et al.
patent: 4537079 (1985-08-01), Lee
Baker Brian K.
Hwan Rei-Nan R.
Leu Lori A.
Gillespie Ronald G.
Kulason Robert A.
O'Loughlin James J.
Texaco Inc.
Woodiel Donald O.
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