COMBINATION VALVE AND ELECTRIC SWITCH ASSEMBLY FOR AUTOMATIC VEHICLE LEVELING SYSTEM
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Abstract
IN PREFERRED FORM, A COMBINATION VALVE AND ELECTRIC SWITCH ASSEMBLY ON AN AIR TANK ENCLOSING A COMPRESSOR. THE INTERIOR OF THE TANK IS CONNECTED TO AN OUTLET IN THE ASSEMBLY. THE ASSEMBLY INCLUDES A NORMALLY CLOSED CHECK VALVE THAT IS CONNECTED BY THE ASSEMBLY TO THE COMPRESSOR INLET. A PRESSURE RESPONSIVE SWITCH IN COMMUNICATION WITH THE CHECK VALVE COMPLETES AN ENERGIZATION CIRCUIT FOR ELECTRIC COMPRESSOR DRIVE MOTOR WHEN THE INLET IS SUPERCHARGED AND OPENS THE CHECK VALVE SO THE COMPRESSOR WILL CHARGE THE TANK. THE SWITCH INCLUDES AN OVERTRAVEL MECHANISM AND SPRING DETENT ARRANGEMENT FOR PRODUCING SNAP OPENING AND CLOSURE OF THE ELECTRICAL SWITCH OF THE ASSEMBLY IN RESPONSE TO CHANGES IN SENSED PRESSURE.
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