| 摘要 |
The filter comprises an outer casing (11 ), an upper closure cover (12), and a filter cartridge (20) having a tubular filter medium (21) positioned inside the inner chamber (13), to separate the filter inner chamber (13) into a first region communicating with the inlet and a second region communicating with the outlet, and an upper disc (22) joined to the upper end of the filter medium (21). First coupling elements (31) joined to the cover (12) and projecting axially towards the interior of the chamber (13), and second coupling elements (41) joined to the upper disc (22) and projecting axially towards the upper cover (12), are provided to act together to achieve mutual snap-coupling. The first coupling elements (31) comprise axially extending coupling teeth with elastic action in a radial direction, and the second coupling elements (41) comprise a generally cylindrical surface divided into a number of identical sectors equal to the number of coupling teeth (31), each sector comprising a coupling region (43) for snap-engaging the coupling teeth (31) axially, and a disengagement region (44), positioned to the side of the coupling region (43), for releasing the coupling teeth (31) from their engagement with the coupling region (43) by rotating the cartridge (20) through a small angle relative to the upper cover (12). |
