Electricity: circuit makers and breakers – Fluid pressure – Piston
Patent
1974-10-24
1976-10-12
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Piston
200 83Y, 340 52C, 251324, H01H 3538, H01H 3534
Patent
active
039859860
ABSTRACT:
A differential pressure warning switch comprising a housing defining a chamber, hydraulic conduits communicating the master cylinder and front and rear fluid brake actuators of an associated vehicular brake system with the chamber, a shuttle piston movable within the chamber between opposed translated positions in response to differential pressure conditions existing between the front and rear brakes of the vehicle, and a pair of pressur responsive flexible diaphragm elements arranged adjacent the opposite ends of the shuttle piston and adapted to effect shuttle movement of the piston in response to predetermined differential pressur conditions in the brake system, whereby to complete an electrical circuit to an associated warning lamp or the like.
REFERENCES:
patent: 3011595 (1961-12-01), Heiss et al.
patent: 3187133 (1965-06-01), Pierce
patent: 3382333 (1968-05-01), Ihnacik, Jr.
patent: 3591051 (1971-07-01), Mitchell
patent: 3672732 (1972-06-01), Green
patent: 3916129 (1975-10-01), Cadeddu
Kelsey-Hayes Company
Tolin Gerald P.
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