A portable air filter cleaning device includes a housing configured to receive an air filter to be cleaned, at least one spray mechanism within the housing for spraying fluid onto the air filter to be cleaned within the housing, a cleaning fluid reservoir coupled to at least one spray mechanism for selectively spraying cleaning fluid onto the air filter to be cleaned within the housing, a rinsing fluid reservoir coupled to at least one spray mechanism for selectively spraying rinsing fluid onto the air filter to be cleaned within the housing; and a motor for facilitating cleaning, rinsing and drying of the air filter to be cleaned. The device may be rotational for cylindrical type air filters or designed for cleaning flat plate type air filters. An associated method of cleaning an air filter is disclosed.

The present invention relates to an improved water pipe comprising a chamber containing water in its lower portion, its upper compact cylindrical portion serving as a smoke collection reservoir; a bowl for combusting tobacco or medicinal herbs, the smoke directed through a tube to the water chamber below the water; and a mouth piece for applying suction to the interior of the chamber to inhale the smoke.

A method of cleaning plugged or dirty porous metallic filter elements to regain filter activity, comprising the steps of: steaming a filter element for a first period of time; submerging the filter element in a first solution; and exposing the first solution to ultrasound waves for a second period of time.

A method of cleaning plugged or dirty porous metallic filter elements to regain filter activity, comprising the steps of: steaming a filter element for a first period of time; submerging the filter element in a first solution; and exposing the first solution to ultrasound waves for a second period of time.

A pneumatic air filter cleaning device is configured to clean an air filter, a cavity, a pair of openings, and a plurality of fibrous walls that capture contaminants. The device may comprise a first cap and a second cap disposed in a spaced-apart, coplanar relationship. A U-shaped tube extends between the caps in a rotatable relationship. The U-shaped tube has apertures offset from a radial vector configured to discharge pressurized air while rotating 360 degrees. An air tube feeds pressurized air into the U-shaped tube, creating inertia that rotates the U-shaped tube while simultaneously discharging pressurized air from the apertures. The air filter is cleaned from the inside out, and in a uniform manner. An attached container may capture dislodged contaminants.

An exhaust gas purification apparatus for an internal combustion engine, capable of carrying out oxidation removal of PM deposited in a filter as a whole in an efficient manner, includes a filter arranged in an exhaust passage of the internal combustion engine and having an oxidation catalyst supported in at least an upstream side portion thereof, and a heating device arranged so as to be able to heat the upstream side portion of the filter irrespective of oxidation reaction heat of the oxidation catalyst, wherein when filter upstream regeneration processing to oxidize and remove deposition PM in the upstream side portion of the filter is carried out by controlling a heating device, an amount of decrease of the upstream side deposition PM by the filter upstream regeneration processing is reflected on an amount of filter PM deposition in the ordinary filter regeneration processing which oxidizes and removes the deposition PM in the entire filter by means of oxidation reaction heat of unburnt fuel generated by the oxidation catalyst supported in the filter, and the filter upstream regeneration processing is ended, even if the thus reflected amount of filter PM deposition is in a state of being larger than a reference amount of deposition which is a threshold value for ending the ordinary filter regeneration processing.

Provided are flexible containers for holding a concentrate, the containers comprising: a flexible body holding the concentrate, a spout, a filter element disposed in the spout, the filter element comprising a filter and an attachment element configured to attach to a water source. Also provided are methods of reconstituting concentrated products using the flexible containers.

Provided are flexible containers for holding a concentrate, the containers comprising: a flexible body holding the concentrate, a spout, a filter element disposed in the spout, the filter element comprising a filter and an attachment element configured to attach to a water source. Also provided are methods of reconstituting concentrated products using the flexible containers.

A water treatment system including an enclosure for water to be treated, a multiplicity of biomass carriers located within the enclosure, at least one airlift in the enclosure for raising the water and the biomass carriers and at least one mechanical biomass carrier accumulated residue removal apparatus operative to remove accumulated residue from the biomass carriers.

A filter assembly includes a first screen, defining a first flow passageway, a second screen, defining a second flow passageway, and a third screen defining a third flow passageway. The second screen is positioned between the first screen and the third screen. The first flow passageway is aligned with the third flow passageway and the second flow passageway is offset from the first flow passageway and the third flow passageway.