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

F - Mech Eng,Light,Heat,Weapons

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26/151, 123/196

F01L 1/14 (2006.01) B21D 53/84 (2006.01) B21K 1/44 (2006.01) B21K 1/76 (2006.01) B23P 15/00 (2006.01)

Patent

CA 2020408

ONE-PIECE PUSH ROD HAVING ENLARGED SPHERICAL SEAT ABSTRACT OF THE DISCLOSURE 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° 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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