Method of making low friction finger follower rocker arms

Details Method of making low friction finger follower rocker arms Method of making low friction finger follower rocker arms

1988-07-18

1989-10-10

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 9051, F01L 118

Patent

active

048724297

ABSTRACT:
A low friction finger follower rocker arm is fabricated from flat metal strip sheet stock having a stamped configuration with a centralized opening adapted to be bent later into a channel; the shaping and hardening of the stock section is carried out prior to such bending. The method comprises: (a) (i) shaping the stock to have a pair of aligned journal openings, a pivot surface at one end, a stud contacting surface at the other end, and a pair of grooves aligned with the extremities of the centralized opening and containing the surface therebetween, (ii) locally hardening the surfaces and the edges of the opposed openings; (b) bending the shaped stock along the grooves to form a partial channel having side walls with an included angle of no greater than 40.degree. and with the journal openings approaching alignment on a common axis; and (c) inserting a journalized low friction wear assembly in the opposed journal openings, and then completing the bending of the stock so that the sides of the channel are substantially parallel.

REFERENCES:
patent: 4245523 (1981-01-01), Wherry
patent: 4533400 (1985-08-01), Benedict
patent: 4583502 (1986-04-01), Takahashi et al.
patent: 4624223 (1986-11-01), Wherry et al.
patent: 4697473 (1987-10-01), Patel
patent: 4738231 (1988-04-01), Patel et al.

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