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US 2007/0102997 A1Published application
Air brake safety device
OwnerGerry Cayerinventor
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OwnerGerry Cayerinventor
Estimating the term…
The invention is particularly directed toward a safety device for a truck trailer having a valve, the valve having a casing rotatably mounting a valve spool therein. The casing has an air inlet, an air outlet,a vent outlet, and an alarm outlet. The spool has a passageway therethrough. The air inlet connects toconnectable to an air compressor. The air outlet connects to the brakes of the trailer. The vent leads to the atmosphere. The alarm outlet leads to an alarm. The valve spool is selectivley rotatable within the casing to one of: a drive position where the valve connects the air inlet to the air outlet and blocks the vent and alarm outlets; a locked position where the valve connects the air outlet to the vent outlet and blocks the air inlet and alarm outlet; and an alarm position where the valve connects the air air inlet to the alarm outlet and blocks the air and vent outlets.
A safety device for a trailer having a valve, the valve having a casing rotatably mounting a valve spool therein, the casing having an air inlet, an air outlet and a vent outlet, the valve spool having a passageway therethrough, the air inlet connectable to a first brake line section from a compressor, the air outlet connectable to a second brake line section leading to brakes on the trailer, the vent outlet leading to the atmosphere, the valve spool rotatable within the casing between a drive position where the valve connects the air inlet to the air outlet and blocks the vent outlet, and a locked position where the valve connects the air outlet to the vent outlet and blocks the air inlet.
A truck trailer having rear wheels and brakes for the rear wheels, a braking system for the trailer having a brake line for connecting to an air compressor, the air compressor mounted on one of the trailer or a truck tractor used to pull the trailer, the brake line connecting the air compressor to the brakes, a safety device inserted into the brake line, the safety device having a valve, the valve having a casing rotatably mounting a valve spool therein, the casing having an air inlet, an air outlet and a vent outlet, the air inlet connectable to the brake line section from the compressor, the air outlet connectable to the brake line section leading to brakes on the trailer, the vent outlet leading to the atmosphere, the valve spool rotatable within the casing between a drive position where the valve connects the air inlet to the air outlet and blocks the vent outlet and a locked position where the valve blocks connects the air outlet to the vent outlet and blocks the air inlet.
Dependencies are inferred from the claim text.