Wabco Automotive UK Limited

Stephen R Earle

Henry J Levington

A device (10), and a method for forming such a device (10), for a fluid system for a vehicle, comprises first and second members (12, 13). The first member (12) is adapted for direct mounting on the chassis or engine of a vehicle (11); the second member (13) defines at least part of a leak tight fluid chamber (15) of the device (10). The first member (12) is of a thermoset material suitable for withstanding operating conditions and loads associated with direct mounting of the device (10) on the chassis or engine (11), and the second member (13) is of a thermoplastic material suitable for welding to ensure leaktightness of a fluid chamber (15). The second member (13) is interlocked with the first member (12) during moulding thereof.

Composite device for a fluid system of a vehicle

A vacuum pump comprises a casing body (11,12) having a cylinder liner (16) therein which defines a primary exhaust passage between the outer wall of the liner and the inner wall of the body. The exhaust passage includes restrictors (20,21), which permit the spaces (37,38) in the interior of the body to be used as silencer chambers.

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Pudsey, United Kingdom

Stephen R Earle