Lucas Industries Public Limited Company

Stuart J Briggs

Peter Schluter

Philip Cunningham

David J Parker

A vehicle brake servo booster has a housing divided into pressure chambers by a movable partition carried by a reciprocable hub member. A switch device is mounted on the housing and operable by an abutment member carried by a reciprocable piston to control an electrical circuit supplying a vehicle rear brake warning light.

Brake servo booster

A brake servo booster has a housing (1) divided into two chambers (A, B) by a movable partition (5) which includes a diaphragm (6). A protective boot (14) for a support member (11) extending through the housing is connected to the diaphragm by a carrier member (16) engaged by adjacent portions (14A, 6A) of the boot and diaphragm in a manner which avoids direct contact between these portions and facilitates assembly of the booster.

A fabricated master cylinder includes a pressure cylinder and a separately made reservoir mounted thereon by way of a mounting device on the cylinder and a mounting formation on the reservoir. The mounting device and reservoir provide restraint surfaces for engagement by a locking device which, when engaged, maintains the cylinder and reservoir in co-operative relationship. In an alternative arrangement, the restraint surfaces are on respective parts of the mounting device and formation which, themselves act as locking means.

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Cwmbran, United Kingdom

Stuart J Briggs