Pressure sensor with a substantially flat overpressure stop for

Details Pressure sensor with a substantially flat overpressure stop for Pressure sensor with a substantially flat overpressure stop for

1983-12-09

1986-02-25

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73706, 73724, 361283, G01L 912

Patent

active

045720002

ABSTRACT:
A transducer for sensing pressure has a first and a second pressure chamber for sensing pressure and a center stop which has two substantially flat faces, each face cooperating with an associated sensor diaphragm which forms the first and the second pressure chamber. The two chambers are fluidically coupled together. Each of the diaphragms is responsive to a pressure P1 or P2 respectively and the transducer is easily configured to sense differential, gage or absolute pressure. When the pressure to be sensed exceeds a predetermined value the affected sensing diaphragm is supported by the respective substantial flat face of the center stop.

REFERENCES:
patent: 3239827 (1966-03-01), Werner et al.
patent: 3618390 (1971-11-01), Frick
patent: 4091682 (1978-05-01), Abbott et al.
patent: 4163395 (1979-08-01), Medlar et al.
patent: 4207604 (1980-06-01), Bell
patent: 4257274 (1981-03-01), Shimada et al.
patent: 4306460 (1981-12-01), Sakurai et al.
patent: 4388833 (1983-06-01), Kuwayama
patent: 4398194 (1983-08-01), Johnston
IEEE Transactions on Electron Devices, vol. Ed.-27, No. 5, May, 1980, pp. 927-930.
Behr, M. and J. Giachino, "A Miniature Pressure Sensor for Automotive Applications," I Mech. E. Conference Pub. 1981-10 (1981), presented at The Third International Conference on Automotive Electronics at London in Oct. 1981.
Drawing "CPT-II" (FIG. 6.3) acknowledged as prior art.

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