Patent ID: 6289786
Filing Date: 2001-09-18
Classification: B60T,Y10T

Abstract:
A method of making a piston of the type used in vehicle brake actuators including a generally flat piston plate and a piston rod extending generally perpendicular to said piston plate from a mid-portion of said piston plate, said method comprising:forming a generally cylindrical opening in a mid-portion of said piston plate;forming a piston rod including a shank portion and a generally cylindrical head portion having a diameter greater than an internal diameter of said piston plate opening and a longitudinally projecting annular rim portion on a free end of said head portion opposite said shank portion;driving said piston rod head portion free end into said opening in said piston plate, forming an interference fit; anddeforming said rim portion of said piston rod head portion radially outwardly, permanently affixing said piston rod to said piston plate.