Patent ID: 7281551

Claim:
Device for drawing off hydraulic fluid from a hydraulic brake circuit for the wheel brakes of a vehicle/refilling the circuit with hydraulic fluid, and for bleeding air out of hydraulic fluid in the brake circuit, characterized by a pneumatic circuit having line elements ( 4 ) from a compressed air connection ( 42 ) to a compressed air-driven element ( 2 ), which is coupled into a hydraulic circuit forming part of the device and which serves to generate both excess pressure and vacuum in the hydraulic circuit of the device, this hydraulic circuit being provided with a first brake fluid connection ( 30 ) for the connection either of a brake fluid reservoir forming part of the brake circuit of the vehicle in question, or of a bleed nipple on any of the vehicle wheel brakes; a second brake fluid connection ( 32 ) for drawing off old brake fluid from the brake circuit via the hydraulic circuit of the device; a third brake fluid connection ( 34 ) for supplying fresh brake fluid to the vehicle brake circuit via the hydraulic circuit of the device, the hydraulic circuit comprising a manually adjustable two-way valve ( 10 ), which in one position opens a connection for extracting old brake fluid from the brake fluid reservoir, and in its other position opens a connection for refilling the brake fluid reservoir with fresh brake fluid.