Back-up pressure intensifier for master cylinder failure

Details Back-up pressure intensifier for master cylinder failure Back-up pressure intensifier for master cylinder failure

1995-06-22

1996-11-26

Ballato, Josie

Power plants

Pressure fluid source and motor

Pulsator

60582, 30312209, B60T 1500

Patent

active

055773842

ABSTRACT:
A braking unit includes an intensifier mechanism for intensifying a braking liquid pressure of a master cylinder upon failure of a liquid pressure booster. The braking unit comprises the intensifier mechanism for intensifying the braking liquid pressure of the master cylinder when actuated, and a control valve which makes the intensifier mechanism operable upon failure of the liquid pressure booster. The control valve comprises a valve member which is urged by a spring tensioned with a given load and which is urged in the opposite direction from the spring by a liquid pressure of a power chamber of the liquid pressure booster. The valve member makes the intensifier mechanism operable whenever the resilience of the spring exceeds the urging force produced by the liquid pressure in the power chamber of the liquid pressure booster. This prevents an operational lag of the intensifier mechanism in the event the liquid pressure booster fails.

REFERENCES:
patent: 1970999 (1934-08-01), Ferris et al.
patent: 4986613 (1991-01-01), Nishii et al.

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