A passive fluid treatment assembly is provided including a passive treatment body defining a primary flow path and a liquid treatment path. The liquid treatment path bypasses a portion of the primary flow path and enters a treatment enclosure through a high pressure port. The fluid entering the high pressure port is treated by a treatment media in the treatment enclosure and exits through a low pressure port into a mixing chamber where it is remixed with the fluid in the primary flow path. A one-way valve is operably coupled to an outlet of the high pressure port for preventing the flow of treated fluid from exiting the treatment enclosure through the high pressure port.

A water purifying filter cartridge structure includes: a filter cartridge main body and a filter cartridge bottom seat. The filter cartridge main body includes: a filter barrel, a filter barrel cover, a filter body, a filter chamber, and a back flow check component. The filter barrel cover is disposed on a top portion of the filter barrel. The filter body is adapted to remove impurities from water. The filter chamber is disposed in the filter barrel, and the back flow check component is disposed in the filter barrel. The back flow check component includes a first back flow check piece, a second back flow check piece, and a third back flow check piece. The first back flow check piece and the second back flow check piece are adapted to prevent back flow at the water input end.

A filtering device includes a water pump, a filter cartridge, and a communicating tube for coupling the water pump with the filter cartridge. The filtering device further includes a flow switch attached to the communicating tube and configured to change switching states in response to a water flow rate in the communicating tube being lower than a predetermined value. The filtering device further includes a reminding device operably connected to the water flow switch. The reminding device generates a reminder signal when the state of the water flow indicates that the flow rate of the water in the communicating tube is lower than the predetermined value. The control system includes a control panel for the filtering pump, a central control system, and a filtration detecting system. The control panel is connected to the central control system and the central control system is connected to the filtration detecting system.

A filter unit (20, 320, 420, 820, 1020) is provided that includes a filtration chamber (30, 330, 430, 830, 1030) and a filter assembly (32, 132, 232, 432, 532, 632, 732, 832, 1032). A filter cartridge (28, 128, 328, 428, 528, 728, 828, 1028) of the filter assembly (32, 132, 232, 432, 532, 632, 732, 832, 1032) includes a support shell (44, 144, 344, 444, 744, 844) and a filter (60, 860) coupled to a support-shell side wall (50, 350, 850) so as to cover support-shell side openings (52, 352, 852). A handle (62, 162, 262, 362, 662, 762, 862, 1062) of the filter assembly (32, 132, 232, 432, 532, 632, 732, 832, 1032) is coupled to a proximal end of the support shell (44, 144, 344, 444, 744, 844). The filter assembly (32, 132, 232, 432, 532, 632, 732, 832, 1032) is partially insertable into the filtration chamber (30, 330, 430, 830, 1030), such that the filter assembly (32, 132, 232, 432, 532, 632, 732, 832, 1032) passes through a filter-assembly opening (40, 840) of the filtration chamber (30, 330, 430, 830, 1030); the handle (62, 162, 262, 362, 662, 762, 862, 1062) is disposed outside the filtration chamber (30, 330, 430, 830, 1030); and the filter cartridge (28, 128, 328, 428, 528, 728, 828, 1028) is disposed within the filtration chamber (30, 330, 430, 830, 1030). The filter (60, 860) is configured to filter biological particulate from a liquid specimen sample (22) when the liquid specimen sample (22) is driven along a fluid flow path (68, 868) while the filter cartridge (28, 128, 328, 428, 528, 728, 828, 1028) is disposed within the filtration chamber (30, 330, 430, 830, 1030). Other embodiments are also described.

A blood filtering device has a tubular housing with a tubular section and tubular housing volume. A filtration section with a filter medium separating a raw side from a clean side is arranged in the tubular housing. The filtration section is movable along the tubular section and movably sealed relative to the tubular housing. The filtration section separates the tubular housing volume into variable first and second tubular housing volumes. A first communication path extends between raw side and first tubular housing volume. A second communication path exits between raw side and second tubular housing volume. When moving the filtration section, blood in the first tubular housing volume flows through the first communication path to the raw side; blood plasma passes through the filter medium to the clean side; residual blood flows through the second communication path into the variable second tubular housing volume.

A disposable filter for filtering a working fluid including a housing having an inlet to be disposed in fluid communication with a working fluid and an outlet to be disposed in fluid communication with a machine. A filter media is disposed within the housing for filtering the working fluid passing through the disposable filter between the inlet and outlet. At least one accessory port is positioned adjacent to and fluidly connected to at least one of the inlet and the outlet for receiving an accessory for monitoring a characteristic of the working fluid passing through the inlet or the outlet of the disposable filter and/or an operational condition of the disposable filter or associated machinery.

A filter system for filtering a working fluid including a disposable filter having an inlet to be disposed in fluid communication with a working fluid and an outlet to be disposed in fluid communication with a machine. The disposable filter includes a sensor assembly or accessory for monitoring a characteristic of the working fluid passing through the disposable filter and/or an operational condition of the disposable filter. The disposable filter includes a communication module for communicating the monitored characteristic or operational condition to a controller. The controller is configured to analyze the received information and generate an optimal maintenance schedule and predicted remaining useful life of the machine, disposable filter, or working fluid. A method of operating the filter system is also provided.

A disposable filter including an integrated sensor is provided for filtering a working fluid and monitoring the working fluid and/or the performance of the filter. The filter includes a housing with an inlet and an outlet with filter media disposed within the housing in a flow path defined between the inlet and the outlet. The integrated sensor is disposed within the housing, where the integrated sensor monitors a characteristic of the working fluid or other performance characteristic of the filter. The sensor assembly may include a communication module. The sensor assembly may include a RF tank circuit with a capacitor plate, which may be disposed adjacent a bypass structure that is disposed adjacent the outlet. Movement of a moveable part of the bypass structure in response to a pressure buildup will cause a shift in a resonant frequency of the tank circuit.

An assembly is provided for a turbine engine. This turbine engine assembly includes a turbine engine component and a lubrication system. The lubrication system directs lubricant through the turbine engine component. The lubrication system includes a wash flow filter.

An apparatus and method for filtering a liquid utilize a filter apparatus including a bypass filter, a full flow filter, and a flow balancing element for dividing a total inlet flow of fluid to the filter apparatus into a bypass portion, passing through the bypass filter, and a full flow portion, passing through the full flow filter. The bypass filter has a lower filtering efficiency than the full flow filter element, so that a venturi tube is not required for causing the bypass portion to pass through the bypass filter. The flow balancing element divides the flow into a desired bypass portion and a desired full flow portion, at a predetermined operating temperature. Below the operating temperature, the bypass portion increases and the full flow portion decreases, the bypass portion becoming greater than the full flow portion at a second predetermined temperature below the operating temperature.