초록 ▼

The braking and steering brake system of the present invention comprises two master cylinders, operable singly or jointly via brake pedals, with the master cylinders having a primary and a secondary piston each operating in a bore. The primary pressure chambers formed by the pistons are connected to

The braking and steering brake system of the present invention comprises two master cylinders, operable singly or jointly via brake pedals, with the master cylinders having a primary and a secondary piston each operating in a bore. The primary pressure chambers formed by the pistons are connected to the rear wheel brakes of a vehicle. The secondary pressure chambers are interconnected via a pressure fluid line in any state of operation. The primary pressure chambers via a valve arrangement and pressure medium line are interconnected in both the release position and in the braking position. The brakes of the non-steering-braked front axle are connected to the pressure fluid line. In a steering brake position, through a compression spring, one of the two valve arrangements closes so that only the steered-braked brake is supplied with pressure medium.

대표청구항 ▼

A hydraulic and steering brake system adapted for use with a vehicle, comprising two master cylinders operable singly or jointly by way of separate brake pedals, in which each said master cylinder includes a primray piston and a secondary piston each slidably disposed in a bore including a primary p

A hydraulic and steering brake system adapted for use with a vehicle, comprising two master cylinders operable singly or jointly by way of separate brake pedals, in which each said master cylinder includes a primray piston and a secondary piston each slidably disposed in a bore including a primary pressure chamber between said primary piston and said secondary piston and a secondary pressure chamber between said secondary piston and a closed end of the bore, the primary pressure chambers each connected to a first equalizing chamber by way of a first channel between each said primary pressure chamber and said first equalizing chamber and the secondary pressure chamber each connected to a second equalizing chamber by way of a second channel between each said secondary pressure chamber and said second equalizing chamber, means operable upon actuation of the primary and secondary pistons from a release position of the respective master cylinders toward a braking position to disconnect each said primary and secondary pressure chamber from said respective first and second equalizing chamber including a closing member disposed between each of said first and second channels and each of said respective primary and secondary pressure chambers associated with said channels, the secondary pressure chambers interconnected through an equalizing line and the primary pressure chambers are respectively connected to steering-brakeable brakes on wheels at opposite sides of the vehicle, the primary pressure chambers interconnected through a pressure line and valve means associated with each master cylinder for establishing a pressure connection between the primary pressure chambers in the event that the two master cylinders are actuated simultaneously, and for hydraulically separating said primary pressure chambers in the event that only one of the master cylinders is actuated, said valve means for each master cylinder includes a valve member disposed in the bore between the primary and the secondary pistons of the master cylinder, said valve means adapted to be open in both the release position and the braking position, wherein both master cylinder primary pistons occupy substantially an identical relative axial position in said bore of its respective master cylinder, whereby said pressure medium connection of the primary pressure chambers is established therebetween through said valve means and said pressure line, said valve member includes seal means responsive upon actuation of only one if said primary pistons toward the braking position, wherein only one master cylinder is actuated, for sealing off in a pressure-tight manner the pressure medium connection between the primary pressure chamber associated with said master cylinder that is actuated and the primary pressure chamber of the other master cylinder.