Electrical resistors – Resistance value responsive to a condition – Fluid- or gas pressure-actuated
Patent
1989-01-17
1991-09-03
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Fluid- or gas pressure-actuated
338 36, 7386258, 92 34, H01C 1010
Patent
active
050458302
ABSTRACT:
A hydraulic actuating apparatus includes a cylindrical case having a fitting at one end connectable to a source of pressurized oil, the fitting having a passage for communication with the pressurized oil, a slider slidably carried by the cylindrical case, the slider being slidable in response to the oil pressure, a first spring device for biasing the slider in a predetermined direction to resist the force on the slider applied by the oil pressure, a slidable contact device carried by the slider, an oil pressure sensor which includes a resistor and a ground conductor, the slidable contact device being slidably engaged with the resistor, the resistor being fixed with respect to the slidable contact device, and a second spring device for biasing the slider in the predetermined direction. The second spring device is connected to the slider, with the second spring device having a smaller spring constant than the first spring device. The hydraulic actuating apparatus further includes a fuel pump switch having a movable contact and a fixed contact, wherein movement of the movable contact relative to the fixed contact causes one of contact and release of the fuel pump switch, the fuel pump switch is assembled integrally in the case, and the resistor includes a flat resistor.
REFERENCES:
patent: 4117724 (1978-10-01), Cook
patent: 4279162 (1981-07-01), Neill
patent: 4284969 (1981-08-01), Carbonneau
patent: 4365406 (1982-12-01), Neill
patent: 4433321 (1984-02-01), Widdowson
patent: 4449012 (1984-05-01), Voser
patent: 4479107 (1984-10-01), Bleeke
patent: 4525698 (1985-06-01), Louis
patent: 4648277 (1987-03-01), Obermann
Chuzenji Junio
Kishida Naoto
Okano Masaru
Ozaki Yoshihiro
Sasahara Mikio
Lateef Marvin M.
Toyo Denso Kabushiki Kaisha
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