Hydraulic park brake booster mechanism

A brake assembly for implementation with a hydraulic brake system, comprising:

• a support bracket;
• a master cylinder supported by the support bracket and operable to selectively provide hydraulic pressure to the hydraulic brake system;
• an accumulator piston extending from the master cylinder and operable to enable function of the master cylinder, the accumulator piston operable to maintain hydraulic pressure within the hydraulic brake system;
• an accumulator assembly extending from the support bracket, including:
• a compression plate engaging the accumulator piston;
• an end cap;
• and
• an accumulator spring disposed between the compression plate and the end cap and biasing the compression plate against the accumulator piston;
• and
• a booster arm pivotally supported by one of the support bracket and the master cylinder, and actuable between first and second positions, wherein in the first position the booster arm limits axial movement of the compression plate against the accumulator piston and wherein in the second position the booster arm permits increased axial movement of the compression plate against the accumulator piston.

A hydraulically actuated brake system, comprising:

• a brake assembly operable in a first mode for selectively applying brake pressure to components of the brake system and operable in a second mode for continuously applying brake pressure to the components of the brake system, the brake assembly including:
• an accumulator piston in fluid communication with the brake system to maintain hydraulic pressure therewithin;
• an accumulator assembly operably engaging the accumulator piston and including a compression plate engaging the accumulator piston and an accumulator spring biasing the compression plate against the accumulator piston;
• and
• a booster arm actuable between first and second positions relative to the compression plate, wherein in the first position the booster arm limits axial movement of the compression plate against the accumulator piston and wherein in the second position the booster arm permits increased axial movement of the compression plate against the accumulator piston.