A filter apparatus and method for cleaning filter elements. The filter elements, each including a filter body with an external surface enclosing a filter passage, extend along a longitudinal axis of a vessel housing. A scraper element is disposed about the external surface of each filter body and travels along the longitudinal length of the filter body via a rotational screw to remove deposits. A lower air inlet is included on the vessel to loosen deposits on the filter surfaces, such as during or prior to scraping.

A filter assembly includes a filter head and filter cartridge. The filter cartridge includes a housing and element. The housing includes a can with an open mouth. An interface ring is secured to the can adjacent to the open mouth. The outer ring surface is against the inner wall of the can. The ring wall is angled between the first and second ends greater than one degree and less than 6 degrees. Methods of filtering and making the housing are provided.

A filter assembly includes a filter head and filter cartridge. The filter cartridge includes a housing and element. The housing includes a can with an open mouth. An interface ring is secured to the can adjacent to the open mouth. The outer ring surface is against the inner wall of the can. The ring wall is angled between the first and second ends greater than one degree and less than 6 degrees. Methods of filtering and making the housing are provided.

Filter devices with a flow director surrounded by a filter element providing a large filter surface area and low fluid volumes for efficient filtration and high recovery of sample fluids. The filter device can be configured with dimensions and sealing surfaces to functionally interact as a pre-filter for common usage disposable filter flasks.

Filter devices with a flow director surrounded by a filter element providing a large filter surface area and low fluid volumes for efficient filtration and high recovery of sample fluids. The filter device can be configured with dimensions and sealing surfaces to functionally interact as a pre-filter for common usage disposable filter flasks.

A suction filter includes a filter element disposed in a fuel tank and filtering a stored fuel that is a fuel stored in the fuel tank by allowing the stored fuel passing the filter element into an inner space, a dividing wall element disposed to divide the inner space into a first space, into which a filtered fuel that is the fuel filtered by the filter element flows, and a second space, to which an intake port drawing in the filtered fuel is opened, and enclosing the first space together with the filter element and enclosing the second space together with the filter element, and a passage element including an inflow port opened to the second space and an outflow port to which an intake pressure is applied by the intake port and defining a flow passage through which filtered fuel flows from the inflow port toward the outflow port.

A suction filter includes a filter element disposed in a fuel tank and filtering a stored fuel that is a fuel stored in the fuel tank by allowing the stored fuel passing the filter element into an inner space, a dividing wall element disposed to divide the inner space into a first space, into which a filtered fuel that is the fuel filtered by the filter element flows, and a second space, to which an intake port drawing in the filtered fuel is opened, and enclosing the first space together with the filter element and enclosing the second space together with the filter element, and a passage element including an inflow port opened to the second space and an outflow port to which an intake pressure is applied by the intake port and defining a flow passage through which filtered fuel flows from the inflow port toward the outflow port.

A protected drain assembly comprising a drain which is at least partially bordered by a hard surface, and which is protected by a drain cover assembly which comprises (A) a polymeric sheet which (i) is on top of the drain and (ii) (a) is substantially impervious to water or (b) comprises a central portion which, when a sediment-containing liquid is placed on top of it, allows the liquid to pass through it, and (B) gaskets which (i) are attached to edges of the polymeric sheet and (ii) secure the edges of the polymeric sheet to the hard surface.

The present disclosure relates to filters in general, and the teachings may be applied to a filter assembly for use in a fuel injector, the fuel injector, and internal combustion engines. A filter assembly may include: a filter element with a frame having an axial end and a tubular filter housing receiving the filter element. The filter housing may have a side wall with a taper supporting the axial end. The taper may have the shape of a conic section with an opening angle of less than 180. The outer circumferential surface of the frame may include a first section in the section of the taper having the shape of a conic section with an opening angle of less than 180.

The present disclosure relates to filters in general, and the teachings may be applied to a filter assembly for use in a fuel injector, the fuel injector, and internal combustion engines. A filter assembly may include: a filter element with a frame having an axial end and a tubular filter housing receiving the filter element. The filter housing may have a side wall with a taper supporting the axial end. The taper may have the shape of a conic section with an opening angle of less than 180. The outer circumferential surface of the frame may include a first section in the section of the taper having the shape of a conic section with an opening angle of less than 180.