| 摘要 |
The oil filter includes a base having an inlet port, an outlet port, and an oil channel communicating with the outlet port. A removable cap is provided to the base, and forms a filter case therewith. A tubular filter element is contained within the filter case. The oil channel coincides with the filter element in axis and extends in an axial direction of the filter case. An inner tube is located in the filter element; and an inner-tube extension fitted thereto movable in the axial direction of the filter case is located on a side of the outlet port. The base includes a holding portion having a joint portion, having the inner tube and the inner-tube extension joined each other, fitted therein. The holding portion includes a clearance portion allowing the inner-tube extension to separate from the inner tube under hydraulic pressure.
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