Pressure checked electrical pressure switch

Details Pressure checked electrical pressure switch Pressure checked electrical pressure switch

1987-06-22

1988-06-21

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Piston

73745, 200 83P, 2003021, H01H 3534

Patent

active

047526580

ABSTRACT:
An electrical pressure switch is used on a hydraulic system to indicate the presence of a minimum operating pressure. The hydraulic fluid acts on a piston to move the piston against a force exerted by a calibration spring. Movement of the piston ultimately closes the contacts of a switch, thereby delivering an electrical signal indicative of minimum operating pressure. A check valve moves in concert with the piston and isolates the internal structure of the pressure switch from escalating hydraulic pressure.

REFERENCES:
patent: 2685650 (1954-08-01), Collins
patent: 3043929 (1962-07-01), Guthrie
patent: 3275769 (1966-09-01), Weaver
patent: 3379841 (1968-04-01), Lombard
patent: 3444341 (1969-05-01), Mighton
patent: 4297552 (1981-10-01), Lavritsen
patent: 4464551 (1984-08-01), Johnson
patent: 4614849 (1986-09-01), Miller

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