Boat-type rocker arm with stiffening member

Details Boat-type rocker arm with stiffening member Boat-type rocker arm with stiffening member

1992-08-31

1993-05-04

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 9041, 74519, 74559, F01L 118

Patent

active

052071910

ABSTRACT:
A one-piece, cold-formed rocker arm is of the boat-type. It includes a one-piece metal body which is cold formed from a metal blank and is of generally U-shaped cross-sectional configuration throughout most of its length. The rocker arm body has two generally parallel side walls and a connecting bottom wall therebetween. The body also has inwardly-extending side walls extending from the parallel ones toward both ends of the body. The bottom wall extends between the side walls and has an opening for receiving a pivotal support, a recess for receiving a push rod at one end, and a pad for engaging an end of a valve stem at the other end. An elongate stiffening member extends between upper edges of side walls and specifically between the inwardly-extending side walls extending toward the push rod end of the body. The stiffening member preferably is a rod received in notches in the upper ends of the edges of the side walls and affixed thereto by resistance welding.

REFERENCES:
patent: 2905161 (1959-09-01), Latham
patent: 4825717 (1989-05-01), Mills
patent: 4848180 (1989-07-01), Mills
patent: 4858575 (1989-08-01), Fittro et al.
patent: 4940048 (1990-07-01), Mills
patent: 5060606 (1991-10-01), Hubbard
patent: 5074261 (1991-12-01), Hamburg et al.

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