Rocker arm assembly

Details Rocker arm assembly Rocker arm assembly

1992-03-16

1993-03-02

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 9041, 74519, 74559, 384 2, F01L 118

Patent

active

051900009

ABSTRACT:
The present invention provides a rocker arm assembly for an internal combustion engine comprising an elongate rocker arm having a pushrod engaging portion proximate one end, a valve stem engaging portion proximate its other end, and a socket-forming recess inbetween the ends with an aperture therethrough, retaining stud means extending through the aperture, part-ball-means retained on the stud means within the socket-forming recess forming with the recess a ball-in-socket type coupling of the rocker arm and stud means for relative articulated movement, the improvement wherein a plurality of ball bearings are arranged in a part spherical array to bear loading beteeen the recess and the part-ball means. By providing either of the recess or the part-ball member with a part spherical bearing surface, the ball bearings may be coupled to the other in a spherical array. Preferably, the ball bearings may be carried in a ring-like frustospherical raceway to protrude from both inwardly and outwardly directed surfaces of the raceway into engagement with frustospherical bearing surfaces both formed in the recess and on the part-ball member.

REFERENCES:
patent: 3359959 (1967-12-01), Rose
patent: 3614943 (1971-10-01), Schley
patent: 4314732 (1982-02-01), Murphy
patent: 4440121 (1984-04-01), Clancy et al.
patent: 4577911 (1986-03-01), Fredericksen et al.
patent: 4718379 (1988-01-01), Clark

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