Brake pressure imbalance switch

Details Brake pressure imbalance switch Brake pressure imbalance switch

1974-11-14

1976-03-30

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Piston

340 52C, 116 70, H01H 3538

Patent

active

039476480

ABSTRACT:
A switch apparatus for detecting an imbalance condition between a first fluid circuit and a second fluid circuit. The switch apparatus has a housing with a bore therein in which a sleeve is located. The sleeve has a peripheral section which is electrically non-conductive and a central bore therethrough with a first diameter and a second diameter. A first piston is located in the first diameter and a second piston is located in the second diameter. A pin is connected to the second piston to limit the movement thereof in the central bore. When a pressure imbalance occurs, the sleeve will move and allow a plunger to move off the non-conductive peripheral surface to complete an electric circuit to inform an operator of a potential brake system failure.

REFERENCES:
patent: 3567884 (1971-03-01), Douglas
patent: 3699513 (1972-10-01), Nicodeme
patent: 3782780 (1974-01-01), Orzel

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