Lucas Industries Limited

Derek J Flynn

Alfred W Thomas

John F Pickering

A master cylinder for a vehicle braking system comprises a body (2) with a bore (3) open at the rear end of the body, a reservoir (4), a transverse port (17) in the body opening into the bore (3) and positioned rearwardly of the reservoir, and a passageway defined between the exterior of the body (2) and a sleeve (22) mounted thereon to communicate the transverse port (17) with a chamber (7) of the reservoir. in different disclosed embodiments the sleeve may be integral with the housing of a booster assembled with the master cylinder and an element may be interposed between the sleeve and the master cylinder body and be provided with a tubular extension interconnecting the reservoir with the passageway.

Master cylinders with rear exterior shell forming reservoir passage

A master cylinder and reservoir assembly comprises a reservoir (2) having a depending foot portion (13). For ease of assembly of the reservoir on the master cylinder (1), the foot portion (13) has opposed laterally extending projections which slide in complementary longitudinal recesses (12) at the top of the master cylinder. The reservoir may be held in place by friction, or some arrangement for positively retaining the reservoir may be provided.

Master cylinder and reservoir assemblies

A control valve for fluids has two relatively rotatable plates, each having ports which cooperate to control fluid flow. The plates are biased towards one another, and one of the plates is provided with lands round its ports, these lands creating a space between the plates, to which space the fluid pressure at the valve inlet is admitted. The pressure between the plates opposes the inlet pressure acting on one of the plates, and the areas of the aforesaid one plate subjected to the inlet pressure are selected so as to produced a desired force between the plates.

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Solihull, United Kingdom

Derek J Flynn