Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1989-07-31
1991-02-26
Lindsey, Rodney M.
Machine element or mechanism
Control lever and linkage systems
Elements
74569, 123 9044, G05G 110
Patent
active
049952811
ABSTRACT:
A rocker arm of the cam follower type has a rocker arm body formed of a metal matrix composite material comprising a lightweight metal, preferably aluminum, having ceramic material mixed therein. The rocker arm may take the form of a "slider" arm which included a pad for slideably engaging a cam on a rotating cam shaft for pivotally moving the rocker arm to operate an associated valve. For a slider rocker arm, the cam engaging pad comprises a wear resistant ceramic material which may be integrally formed into the rocker arm or otherwise secured thereto after forming. Alternately, the rocker arm may take the form of a "roller" rocker arm wherein a roller formed of a first ceramic material is rotatably mounted on an axle formed of a second ceramic material and mounted between sidewalls of the rocker arm body. One or both ceramic materials may be porous and self-lubricating when impregnated with a solid or liquid lubricant. A variety of hardening techniques, coatings and inserts may be provided as required.
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Allor Richard L.
DeBell George C.
Herman, Sr. John A.
Ford Motor Company
Lindsey Rodney M.
Malleck Joseph W.
May Roger L.
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