Patent ID: 9688259
Date: 2017-06-27
CPC Classifications: B60T

Claim:
1. A boost arrangement for pressurizing a master cylinder of a vehicle braking system of a vehicle, the boost arrangement comprising: a housing defining a boost chamber filled with brake fluid and in fluid communication with a reservoir of brake fluid; the boost chamber having a first portion and a second portion, the second portion being generally axially aligned with a driver input rod, wherein the driver input rod is linearly moveable and operatively coupled to a driver brake pedal of the vehicle, the first portion being spaced apart from and axially unaligned with the second portion, but in fluid communication with the second portion; a primary piston at least partially disposed in the first portion of the boost chamber, the primary piston defining an opening extending straight therethrough from a first end of the primary piston to an opposing second end of the primary piston; and a secondary piston having a distal end extending into the opening defined by the primary piston and a proximal end outside the housing; both of the primary piston and the secondary piston being disposed within the first portion of the boost chamber and movable along an axis which is axially unaligned with the driver input rod; and wherein the boost arrangement actuates the master cylinder to operate a friction braking arrangement of the vehicle.