Electrical resistors – Strain gauge type – Fluid- or gas pressure-actuated
Patent
1990-07-23
1991-11-12
Lateef, Marvin M.
Electrical resistors
Strain gauge type
Fluid- or gas pressure-actuated
7386265, 73720, 73726, 296211, 338 36, G01L 122
Patent
active
050651293
ABSTRACT:
A precision pressure sensor in the form of a load cell has a mounting ring closed at one end by an end wall which has axially outwardly facing dead-end holes therein to form sensor beams each having an axially outwardly facing plane surface to which strain gages are bonded. The dead-end holes have bottoms forming sensor membranes. Opposite the closed end the mounting ring encloses a cavity forming a sensor space which is closed by a closure plug that simultaneously has a bore for admitting fluid under pressure to be measured into the sensor space. A ring groove in the end wall has approximately radially sloping surfaces which together with the dead-end holes determine the minimum cross-section of the measuring beams. The ring groove also determines the minimum thickness of the sensor membranes.
REFERENCES:
patent: 2951223 (1960-08-01), Li
patent: 3035240 (1962-05-01), Starr
patent: 3712123 (1973-01-01), Laimins
patent: 3764950 (1973-10-01), Wallia
patent: 3866157 (1975-02-01), Birkholz
patent: 4017819 (1977-04-01), Pien
patent: 4133100 (1979-01-01), Myhre
patent: 4376929 (1983-03-01), Myhre
patent: 4589291 (1986-05-01), Sander
Hellwig Reimar
Waegner Ralf
Fasse W. G.
Hottinger Baldwin Measurements Inc.
Lateef Marvin M.
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