| 摘要 |
In a push rod seat for use in a tappet adapted for metering oil to a push rod, the passageways for conducting the oil are formed by constructing the seat of upper and lower parts. At least one of the parts has grooves or slots formed therein which in cooperation with the other part forms the passageways. In one embodiment, the lower part in cooperation with the inner bore in which it is located determines the degree of metering by the size of its diameter and its thickness. In another embodiment the size and configuration of slots or grooves in one or both of the parts can provide and determine the degree of metering.
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