Apparatus for applying brakes on a towed vehicle
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United States of America Patent
Stats
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N/A
Issued Date -
Feb 6, 2003
app pub date -
Aug 1, 2001
filing date -
Aug 1, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A supplemental braking system for use on a towed vehicle being towed behind a towing vehicle, especially an automobile being towed behind a motor coach by a tow bar. The supplemental braking system utilizes a vacuum motor to depress the brake pedal in the towed vehicle and thereby apply the brakes on the towed vehicle. The vacuum motor is powered by a vacuum supplied by either the natural vacuum created by the intake of a gas engine of the towing vehicle, or by a separate vacuum pump mounted on the towing vehicle. The same vacuum that is used to provide power to the vacuum motor is also used to supply a vacuum to the vacuum booster on the power brake system of the towed vehicle, thereby permitting much smaller pulling forces to be used in applying the brakes of the towed vehicle. Control valves are provided to selectively apply the brakes of the towed vehicle when the brakes of the towing vehicle are applied. The control valves can be set to only partially apply the brakes on the towed vehicle in the standard braking situation, but to fully apply the brakes in instances where the driver of the towing vehicle is initiating an emergency, or panic, stop or in instances where the towed vehicle has broken away from the towing vehicle.
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