Power plants – Pressure fluid source and motor – Pulsator
Patent
1985-05-15
1986-09-02
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
92108, 92169, 60578, B60T 1300
Patent
active
046088261
ABSTRACT:
A master cylinder construction for automotive brake systems incorporating a servo mechanism in which the master cylinder consists of primary, secondary and fast fill pistons arranged in tandem, the fast fill piston operating in a bore of a larger diameter than that of the primary and secondary pistons the arrangement being characterized in that the fast fill piston is of hollow annular construction consisting of an inner cylindrical wall and an outer cylindrical wall joined together at one end and defining between them an annular space open at the other end, the outer wall being arranged to stroke past a seal into an annular cavity at one end of the master cylinder surrounding part of the bore of the primary piston of the master cylinder and to displace fluid therefrom. The primary piston is constructed to move simultaneously within its bore and to displace fluid therefrom to initiate movement of the secondary piston. Such an arrangement enables the master cylinder to be mounted within the shell of a servo mechanism in close proximity to the piston thereof thereby diminishing the extent to which the master cylinder projects from the shell of the servo mechanism making it particularly suitable for use in motor vehicles having a front wheel drive and a transversely mounted engine.
REFERENCES:
patent: 2311787 (1943-02-01), Swift
patent: 2335069 (1943-11-01), Loweke
patent: 3172265 (1965-03-01), Randol
patent: 4086770 (1978-05-01), Shaw
patent: 4270353 (1981-06-01), Thomas et al.
patent: 4329846 (1982-05-01), Gaiser
patent: 4408457 (1983-10-01), Luepertz
patent: 4481865 (1984-11-01), Becht
Girlock Limited
Hershkovitz Abraham
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