Wabco Automotive UK Limited

American Standard International Inc.

Barry David Thomas

Brian Frank Firth

An air dryer for a vehicle air braking system comprises a container having first, second and third compartments, the first compartment having an upstream inlet for connection to a source of air under pressure, a vent for connection to the exterior of the container and a desiccant therein, the second compartment including a chamber having an inlet downstream of the first compartment with a non-return valve therein, a fluid connection to the first compartment having a restrictor therein, and the third compartment including a chamber having an inlet downstream of the second compartment with a non-return valve therein and an outlet for connection to a fluid pressure using device.

Air braking system component

Drain valve

Air braking system of vehicles usually have a piston compressor (C) and a desiccant (D) for drying the compressor output air. The desiccant is periodically regenerated by downstream air from e.g. a reservoir (R). When a compressor is brought on load, the initial charge of air may be oil laden. The invention provides a delay mechanism to permit such initial charge of air to pass directly to exhaust.

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Bradford, United Kingdom

Barry David Thomas