Appeal No. 96-3374
Application No. 08/115,974
APPENDIX
1. A low friction cam shaft for actuating at least one
valve of an internal combustion engine comprising:
a shaft member extending longitudinally;
at least one cam secured to said shaft member; and
said at least one cam being made of a plurality of
density metal materials, said at least one cam having a base
circle portion and a lobe portion made of one of said density
metal materials, said base circle portion having an interior
portion made of another of said density metal materials, said
interior portion having a porosity less than said lobe portion
and a remainder of said base circle portion, said base circle
portion and said lobe portion having an outer surface with an
open porosity and are impregnated with a solid film lubricant
that has an affinity for oil and promotes rapid formation of a
stable oil film to reduce friction therebetween.
13. A low friction cam shaft for actuating at least one
valve of an internal combustion engine comprising:
a shaft member extending longitudinally and having a
first outer surface;
at least one cam secured to said shaft member having a
base circle portion and lobe portion, said base circle and
lobe portions having a second outer surface, said first and
second outer surfaces having an open porosity and are
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