Abstract: Double acting fuel filter unit comprising a first pre-filter (14) and a second fine filter element (140) connected in series by suitable conduits, wherein said first and second element are supported by the lower and upper opposing sides respectively of a single block (1) within which there are positioned: a pump (23, 24, 25) for priming the pre-filter with fuel, a first conduit (3) which connects the lower side of the block to the fuel tank, a second conduit (4) and a third conduit (6) which connect the upper side of the block to the compartment (2) of the priming pump (23, 24, 25), a fourth conduit (7) which connects the upper side of the block to the engine feed conduit, and a fifth conduit (70) which connects the upper surface of the block to the lateral surface thereof; to the lower surface of the block there being fixed a cup casing containing the pre-filter (14), and within which there open said first and second conduit upstream and downstream of the pre-filter 14 respectively; to the upper side of the

Abstract: Filter for internal combustion engine liquids, comprising a casing (2) closed by a removable cover (4) and containing a toroidal filter cartridge (3) which separates the casing cavity into two chambers (21, 22) for passage of the liquid to be filtered and passage of the filtered liquid respectively, in which the inner region of the cover is connected to the facing end of the cartridge by a snap connection system comprising two complementary parts (10, 111) which are associated with the cover and with the cartridge respectively, and can be connected together by axially sliding said cartridge and released from each other by rotating this latter through a predetermined angle, that part of the system associated with the cartridge being located within the central compartment of this latter, and that part of the system associated with the cover being dimensioned and shaped to be able to be inserted into the preceding and coupled thereto, where it retains the facing end of the cartridge in the immediate vicinity of

Abstract: For diesel internal combustion engines, an improved filter unit comprising an outer casing the interior of which is separated by a filtering baffle into two separate chambers to which a fuel inlet conduit and a fuel outlet conduit are connected respectively, with said casing there being associated a device provided with sensors for measuring certain characteristic parameters for correct engine operation.

Abstract: A fuel filter (1) with antifreeze device comprising an outer casing (2), the interior (24) of which is separated by a filtering baffle (5) into two separate chambers (25, 26) to which a fuel inlet conduit (3) and a fuel outlet conduit (4) are connected respectively; said filter (1) comprises a device (6) for generating pressure waves within the casing (2), such that said pressure waves propagate at least through the fuel contained in the interior (24), so increasing its kinetic energy.

Abstract: A filter cartridge (20) having an upper disc (22) joined to an upper end of a tubular filter medium (21) is positioned within a casing (11) having an upper closure cover (12). First coupling elements (31) joined to the cover (12) and second coupling elements (41) joined to the upper disc (22) project axially towards each another to achieve mutual snap-coupling. The first coupling elements (31) include axially-extending coupling teeth elastic in a radial direction, and the second coupling elements (41) include a cylindrical surface divided into identical sectors equal to the number of teeth (31), each sector includes a coupling region (43) for snap-engaging the coupling teeth (31) axially, and a disengagement region (44), positioned to the side of the coupling region (43), for releasing the coupling teeth (31) from their engagement with the coupling region (43) by rotating the cartridge (20) through a small angle relative to the upper cover (12).

Abstract: Base for an internal combustion engine filter cartridge, intended to receive s a filter cartridge (3) provided with apertures for the entry of the oil to be filtered and for the exit of the filtered oil, in a respective upwardly facing matching engagement seat (2) provided with oil feed and discharge. channels to be connected to the matching channels of said cartridge, with said seat—there being peripherally associated a salient enveloping element (33) with which it forms an oil spill protection compartment, from the bottom of which there extends a recovery conduit (6) connected to a collection site and intercepted by a check valve (66), the closed or open state of which depends on whether the cartridge and seat are mutually engaged or disengaged respectively.

Abstract: Fuel filter comprising a cup shaped outer casing provided in its wall with a fuel exit conduit, and closed by an electrically conductive cover connected to earth and provided with an axial fuel feed conduit with which a filter cartridge of toroidal form is associated coaxial to said axial conduit and is sealedly mounted thereon, said cover presenting an axial hole to sealedly receive a glow plug which extends into the interior of the filter cartridge, said plug comprising an outer sheath in contact with the cover and an axial stem insulated from said outer sheath and arranged to be connected to a power cable, between said outer sheath and said stem there being provided an electrical resistance element powered by said cable via temperature control means.