Patent ID: 7814751

Claim:
A master cylinder for a braking system, comprising: a master cylinder primary piston having a primary piston cavity formed therein, wherein said primary piston cavity has an end wall; a sliding piston slidably received in said primary piston cavity; a biasing agency biasing said sliding piston away from said end wall; an abutment connected to said primary piston for abuttably engaging said sliding piston so as to thereby define a limitation of travel of said sliding piston away from said end wall; wherein said limitation of travel defines a travel distance of said sliding piston with respect to said end wall of said primary piston; an intermediate piston abutting said primary piston; and a return spring biasing said intermediate piston toward said primary piston; wherein when said sliding piston abuts said end wall, said biasing agency is at a predetermined maximal compression spring load; wherein said return spring has a predetermined first spring compression load and a first predetermined spring constant, and wherein said biasing agency has a predetermined second spring compression load and second predetermined spring constant; and wherein said predetermined first spring constant and said predetermined first spring compression load are preselected in relation to said predetermined second spring constant, said predetermined second spring compression load and said predetermined maximal spring compression load such that an increasing axial force applied to said sliding piston in a direction toward said end wall results in said sliding piston sliding into abutment with said end wall when the axial force is substantially equal to said first spring compression load.