| 摘要 |
This invention relates to a filter assembly of the kind including a head (which may be a separate part or which may be formed integrally with another part such as an engine block) having an inlet and an outlet, together with a filter unit which is attachable to the head and which is arranged in use to receive a fluid entering said inlet, the fluid then being filtered by the filter unit before flowing out of the outlet. The head is formed with an axially directed annular rim having on its inner surface an annular groove in which is located a retaining clip in the form of a length of wire. The filter unit has at one end a laterally outwardly projecting lip and the depth of the groove in relation to the thickness of the wire is such as to permit the lipped end of the filter unit to be inserted into the axially direction rim of the head and past the retaining clip. Means are also provided to draw together the ends of the retaining clip after the filter unit has been thus inserted so that the clip will engage the lip of the filter unit while a portion of the clip remains within the groove to prevent detachment of the filter unit from the head.
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