| 摘要 |
An end-of-life indicator (20) contains a housing (30), having a pointer (90) that is attachable to a filter cartridge (10), a diaphragm (40) disposed within the housing (30), a rotatable cap (80) adapted to cooperate with the housing (30), a spring (70) for rotating the cap (30) with respect to the housing (30), and an escapement arm (62) for regulating the rotational displacement of the cap (30). The housing (30) is arranged for the ingress of water into and out of the filter cartridge (10) in which the water is pressurized and depressurized and which define fill cycles. The diaphragm (40) is arranged to be moved by the water as it is pressurized and depressurized. The escapement gear (56), reduction gears (52, 53 and 54) and gear plate (50) are arranged to cooperate with the diaphragm (40) and the spring (70) whereby predetermined incremental rotation of the cap (80) is provided during each of the fill cycles. |
