Hill-holder

Details Hill-holder Hill-holder

1989-05-10

1990-04-10

Rosenthal, Arnold

Fluid handling

Systems

Hydraulic brake line

1375992, 192 133, 25112921, F16D 6524, B60K 4120

Patent

active

049151312

ABSTRACT:
This invention relates to a hill-holder which prevents backward rolling of a vehicle when starting the vehicle on a hill facing upwardly. The hill-holder comprises a solenoid valve assembly having a cylindrical core, in its central portion and a bobbin surrounding the cylindrical core. The cylindrical core has two opposite grooves for communication on its outer surface and comprises a rod having a conical-shaped head. Even when the solenoid valve assembly is energized, it is possible for the fluid pressure to flow from the master cylinder assembly to the wheel cylinder assembly. However, the fluid having passed will not be returned unless the switch for a side brake is off or the clutch pedal is depressed.

REFERENCES:
patent: 2574821 (1951-11-01), Forman
patent: 3592228 (1971-07-01), Kukuminato et al.

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