Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1993-05-04
1995-01-03
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
213 76, B60T 1300
Patent
active
053780540
ABSTRACT:
A fluid pressure system and stoplight control circuit for a towed vehicle which is either an intermediate unit or the last unit of a vehicle train includes an inlet supply line for receiving fluid pressure from a preceding unit and an outlet supply line which is connected to a corresponding coupling of a succeeding unit when the vehicle is an intermediate unit and which is connected to a coupling hanger when the unit is the last unit of a vehicle train. A pressure responsive stop light switch is connected into the coupling hanger. Accordingly, when the outlet supply line is connected to the coupling hanger, the contacts of the stop light switch are closed, thus permitting power to the stop lights when a brake application is effected. However, when the outlet supply line is connected to a succeeding vehicle, the coupling hanger is vented, so that the contacts of the pressure responsive switch are open, thus interrupting power to the stop lights and conserving power on the vehicle.
REFERENCES:
patent: 3812444 (1974-05-01), Reno
patent: 3842987 (1974-10-01), Prada
patent: 4049128 (1977-09-01), Jeffrey
Allied-Signal Inc.
Decker Ken C.
Graham Matthew C.
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