Fluid filtration devices and methods of filtering fluids are described. The devices generally include a housing, a hollow filter assembly, a rotating cleaning assembly and a device to measure the accumulation of solids in the filter housing. In some embodiments the accumulation of solids is measured by measuring the torque required to rotate the cleaning assembly. Torque may be measured directly, such as with a torque sensor, or indirectly, such as by measuring the current used by an electric motor to drive rotation of the cleaning assembly. In some embodiments a purge valve is opened to remove accumulated solids from the housing when a certain level of solids accumulation is detected.

An apparatus and a method are provided for an air filter cleaning wand for flushing contaminants from an intake air filter of an automobile engine. The air filter cleaning wand comprises a proximal flange, a conduit, and a distal end portion. The proximal flange is configured to receive a nozzle of a water hose. An interior of the conduit is in fluid communication with the proximal flange. The distal end portion comprises a plurality of longitudinally aligned vents in fluid communication with the interior of the conduit. Upon passing water through the water hose and into the conduit, pressurized water streams exit the vents along the distal end portion so as to flush contaminants from the air filter. The air filter cleaning wand advantageously is comprised of a material which is sufficiently durable and temperature resistant to retain its configuration during operation when coupled to pressurized water sources.

The present invention provides to a filter residue treatment device, comprising a means for supplying a pressurized fluid, a housing comprising a) a first inlet for the introduction of a medium different from the pressurized fluid and comprising a filter residue and b) a second inlet for the introduction of the pressurized fluid and an inflatable or flexible means comprised in the housing and configured and arranged for being operated by the pressurized fluid such that in an inflated or flexed state it pushes the filter residue comprised in the medium introduced through the inlet towards a filter means.

The present invention provides to a filter residue treatment device, comprising a means for supplying a pressurized fluid, a housing comprising a) a first inlet for the introduction of a medium different from the pressurized fluid and comprising a filter residue and b) a second inlet for the introduction of the pressurized fluid and an inflatable or flexible means comprised in the housing and configured and arranged for being operated by the pressurized fluid such that in an inflated or flexed state it pushes the filter residue comprised in the medium introduced through the inlet towards a filter means.

A strainer assembly for a marine engine has a housing with an internal cavity. The housing has a threaded inlet end, an outlet and a flush port. A removable cover assembly covers the threaded inlet end and may be removed to allow a strainer to be removed from inside the housing and cleaned. The flush port may be closed with a plug and opened to allow a threaded end of a garden hose to be attached to the flush port for cleaning the engine.

The oil side-flow cleaning device includes a heating unit (11) installed between the oil tank and the filter unit (10) so that, when the oil temperature is below a defined limit value, oil flows through the filter unit (10) in such a way as to bypass the filtering function and is heated; and so that, when the oil temperature is above the defined limit, oil flows through the filter unit (10) so as to be subjected to the oil filtering function. In addition or as an alternative, the oil side-flow cleaning device comprises a backflush unit including a backflush collecting tank (17) and a backflush nozzle (18), wherein, when the device is in backflush mode, oil flows through the filter medium (16) in a second, opposite direction as a function of the position of the backflush nozzle (18) relative to the filter medium (16).

The oil side-flow cleaning device includes a heating unit (11) installed between the oil tank and the filter unit (10) so that, when the oil temperature is below a defined limit value, oil flows through the filter unit (10) in such a way as to bypass the filtering function and is heated; and so that, when the oil temperature is above the defined limit, oil flows through the filter unit (10) so as to be subjected to the oil filtering function. In addition or as an alternative, the oil side-flow cleaning device comprises a backflush unit including a backflush collecting tank (17) and a backflush nozzle (18), wherein, when the device is in backflush mode, oil flows through the filter medium (16) in a second, opposite direction as a function of the position of the backflush nozzle (18) relative to the filter medium (16).

A filtration system with a filter out of which filtered medium exits is provided. The system includes a control panel that receives pressure and flow rate information of the medium and uses the pressure information to send a first signal to prevent a pressure differential of the medium from exceeding a first set point yet maintain filtration of the medium. The control panel uses the flow rate information to send a second signal to prevent the flow rate of the medium from exceeding a second set point yet maintain filtration of the medium. An actuated flow control valve is present that opens at different amounts, and the medium flows through the actuated flow control valve.

A faucet with built-in filter units includes a plurality of filter units arranged inside a main body of the faucet and also includes a dirt discharge valve so that the present invention requires no addition of external filters attached to the main body and enables automatic washing of hollow fiber membrane type filter units arranged therein so as to improve drinking water hygiene and extend lifespan of the filters.

A faucet with built-in filter units includes a plurality of filter units arranged inside a main body of the faucet and also includes a dirt discharge valve so that the present invention requires no addition of external filters attached to the main body and enables automatic washing of hollow fiber membrane type filter units arranged therein so as to improve drinking water hygiene and extend lifespan of the filters.