Parking brake with safety device

Details Parking brake with safety device Parking brake with safety device

2011-04-26

2011-04-26

Williams, Thomas J (Department: 3657)

Fluid-pressure and analogous brake systems

Multiple systems

C303S015000, C303S089000, C188S170000, C188S265000

Reexamination Certificate

active

07931343

ABSTRACT:
A parking brake having an electromechanical and hydraulic device for gripping a pack of movable sectors connected mechanically to the wheels to exert the desired braking force on the wheels. The parking brake is characterized by having an oil flow regulating valve assembly, in turn having a first control solenoid valve and a second safety solenoid valve in series with each other.

REFERENCES:
patent: 3613839 (1971-10-01), Macduff
patent: 5427440 (1995-06-01), Ward et al.
patent: 6254197 (2001-07-01), Lading et al.
patent: 7097260 (2006-08-01), Brancolini et al.
patent: 7458445 (2008-12-01), Inagaki et al.
patent: 7517026 (2009-04-01), Herbst et al.
patent: 2005/0077781 (2005-04-01), Brancolini et al.
patent: 2005/0127748 (2005-06-01), Goto et al.
patent: WO 2005093280 (2005-10-01), None

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