Smc Corporation of America

Smc Pneumatics, Inc.

Paul D Mundie

Robert L Thommen

David M Phillips

Alexander Montgomery Mlsna

A lift axle control system is provided for a vehicle that has fixed axles and a lift axle. The lift axle is configured to move between a raised position spaced apart from the ground and a lowered position in contact with the ground to reduce the load carried by the fixed axles. The lift axle control system is configured to control the raising and lowering of the lift axle. According to a preferred embodiment of the disclosure, the lift axle control system includes a housing and a valve configured to control the flow of air to a lower bag that lowers the lift axle into contact with the ground.

Lift axle control system

An electro-pneumatic control system pneumatically connected to a pressure source and electrically connected to an electrical signal source includes a selector switch having an electrical input connected to the electrical signal source, and having a first electrical output and a second electrical output. The system further includes a body having a movable member positioned therein, wherein the body has a first port and a second port; a first regulator valve having a bidirectional port connected to the first port of the body, having an input port connected to the pressure source, having an exhaust port, and having an electrical actuator connected to the first electrical output of the selector switch; and a second regulator valve having a bidirectional port connected to the second port of the body, having an input port connected to the pressure source, having an exhaust port, and having an electrical actuator connected to the second electrical output of the selector switch.

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Indianapolis, IN, United States of America

Paul D Mundie