Patent ID: 9139180
Filing Date: 2015-09-22
Classification: B60T

Abstract:
1. A hydraulic master brake cylinder for a vehicle brake system, comprising: a brake force booster; a first thrust rod piston configured to be displaced in the master brake cylinder by muscle force to actuate the vehicle brake system; and a second thrust rod piston configured to be displaced in the master brake cylinder by the brake force booster to actuate the vehicle brake system, wherein the first thrust rod piston is configured such that displacement of the first thrust rod piston results in the first thrust rod piston blocking a breather bore fluidly connecting a brake fluid reservoir with a pressure chamber of the master brake cylinder, and wherein the second thrust rod piston is accommodated in the first thrust rod piston and the first thrust rod piston is configured such that the muscle force displaces the first thrust rod piston relative to the second thrust rod piston.