One-piece push rod having enlarged spherical seat

Details One-piece push rod having enlarged spherical seat One-piece push rod having enlarged spherical seat

1989-12-05

1991-07-02

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

Rod

F01L 114

Patent

active

050277634

ABSTRACT:
A one-piece push rod and method of making same is provided which includes the step of swaging at least one end of a hollow tube to define a seat portion having an extended spherical surface for inhibiting interference with a rocker arm socket. Preferably, the tube is characterized by a thicker middle portion which tapers down to the ends of reduced diameter. The spherical seat portion having an arc of revolution extending through an angle of at least approximately 210.degree. and having a constant wall thickness is formed by first machining a taper on the tips, then cold forming the tapered tips with a punch and finally swaging the extended spherical surface.

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