Vehicle braking system master cylinder

Details Vehicle braking system master cylinder Vehicle braking system master cylinder

2006-05-16

2006-05-16

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Pulsator

C060S562000, C060S591000

Reexamination Certificate

active

07043911

ABSTRACT:
A master cylinder suitable for a vehicle braking system has an unusual capability to supply quantities of fluid and fluid pressures at its output in differentiated manner in dependence on the braking stage, preventing long transitory stages between an approach stage and an actual braking stage. The cylinder comprises a cylinder body having a first chamber and a second chamber provided inside. The first chamber is in operative communication with at least one braking member and houses a first piston. The second chamber, which has larger transverse dimensions than the first chamber, is in operative communication with the first chamber and houses a second piston. Ducts are provided and put the first chamber and the second chamber into communication during the approach stage. The ducts house a low-pressure valve which is open during the approach stage and closed during the actual braking stage.

REFERENCES:
patent: 1958722 (1934-05-01), Sinclair et al.
patent: 2093543 (1937-09-01), Bowen
patent: 3667229 (1972-06-01), Cresto
patent: 3910047 (1975-10-01), Grabb
patent: 3911681 (1975-10-01), Sisco
patent: 3937021 (1976-02-01), Sisco et al.
patent: 4027482 (1977-06-01), Manzini
patent: 4348161 (1982-09-01), Shibata
patent: 4455831 (1984-06-01), Maehara
patent: 6276137 (2001-08-01), Kottmyer et al.
patent: 2436808 (1976-02-01), None
patent: 3631683 (1988-03-01), None

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