Brake actuator having an improved piston and method of...

Details Brake actuator having an improved piston and method of... Brake actuator having an improved piston and method of...

B - Operations, Transporting

60

T

B60T 13/38 (2006.01) B23P 15/10 (2006.01) B60T 17/08 (2006.01)

Patent

CA 2350365

A vehicle brake actuator including an improved piston assembly having a piston plate including an upstanding annular rim portion and a piston rod including a shank portion having a generally cylindrical head portion and an annular rim portion on a free end of the piston rod head portion which is deformed radially into a cylindrical internal surface of the piston plate upstanding rim portion, permanently attaching the piston plate and rod. The method includes piercing and extruding the upstanding rim portion of the piston plate and forming radially projecting teeth on an external surface of the head portion of the piston rod, driving the head portion of the piston rod into the upstanding rim portion of the piston plate, preventing relative rotation of the piston rod and head. The improved piston assembly of this invention eliminates welding, permitting finishing of the piston rod and plate prior to assembly and reduces cost.

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