Appeal No. 96-3202
Application No. 08/183,464
As shown in Figure 2, Oda discloses a tappet cam assembly
including a metal cam 11 and a ceramic tappet 13. The outer
surface of the metal cam 11 is coated with a solid lubricant
and a binder 12 to provide excellent wear-resisting and
friction-resisting performances can be obtained even at high
temperature with dry conditions in which engines are used.2
As shown in Figure 1, Shiraya discloses an aluminum alloy
valve lifter (i.e., tappet) composed of a valve lifter body 1
made of Al-Si type alloy and consisting of a cylindrical
portion 2 and a disc portion 3, an Fe-C type coating 4 sprayed
on the peripheral surface of the cylindrical portion 2, a
wear-resistant chip 5 fixed to the underside of the disc
portion 3, and an adjusting shim 6 set on the upper surface of
the disc portion 3. An end of a valve rod (not shown)
impinges on the wear-resistant chip 5, and a cam (not shown)
comes into contact with the
2See column 5, lines 32-35, and column 6, lines 3-11, of
Oda.
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