VALVE TO DISENGAGE FRONT BRAKE AND/OR THAT OF TRAILER FOR AGRICULTURAL TRACTOR OR SIMILAR VEHICLE Russian patent published in 2012 - IPC B60T11/21 

FIELD: transport.

SUBSTANCE: invention relates to machine building and may be used in automotive brake systems. Valve is designed to disengage the brake of front wheels and/or trailer is case it is connected to braking system via trailer brake valve. Braking system comprises two main cylinders making the pumps controlled by two brake pedals that control braking of one rear wheel, front wheels and/or braking device of trailer via disengagement valve. The latter comprises body with first inlet union and second inlet union for connection to main cylinders, and outlet union for connection with braking circuit of front wheels and/or with brake valve of the trailer. Body has opening receiving one moving piston whereon pressure applied to first inlet union acts. Body incorporates normally-closed shut-off valve to stop communication between second inlet union and outlet union. Moving piston comprises element to open said shut-off valve displaced by pressure applied to first inlet union to communicated second inlet union with outlet union.

EFFECT: simplified design, lower costs.

16 cl, 11 dwg