Abstract: The invention relates to a wheel (1), in particular a light-alloy wheel for motor vehicles, consisting essentially of a rim (2) and wheel spokes (3), the entire periphery of the outer rim flange (15) being provided with a rim-flange protection ring (10). A cavity (71) is formed between the outer rim flange (15) or the outer rim base (9) and the rim-flange protection ring (10), said cavity being suitable for receiving additional engineered elements. The rim-flange protection ring (10) also acts as a protective element in a collision.

Abstract: The invention relates to a wheel, especially a light-metal wheel for motor vehicles, consisting of a star of spokes (12) and a wheel rim (10) provided with an inner base (16) and an outer base (14) that respectively merge into an inner rim end (20) on the inner side of the wheel and into an outer rim end (18) on the outer side of the wheel. A hollow chamber (26, 27, 29) extending at least partially continuously in the peripheral direction is formed in the region of the inner side of the wheel and/or the outer side of the wheel, and can be defined by a profiled wall (28) in the region of the inner base (16) of the rim or the outer base (14) of the rim. In order to create an especially cost-effective structure that can be subjected to mechanical stresses, the profiled wall (28) is embodied as a single component.

Abstract: A wheel, particularly a light metal wheel, for motor vehicles, essentially consists of a spoke wheel center (20) and a rim (10). In order to reduce weight and increase the bending strength, which is of great significance in regard to contact with curbstones and potholes, profile segment (31) in the form of half-shell units, which forms a continuous hollow chamber (41) in the direction of the circumference, at least in sections, are provided in the area of an external base of the rim (14).

Abstract: Disclosed is a wheel, especially a light metal wheel for motor vehicles, essentially comprising a wheel spider (20) and a wheel rim (10). Said wheel rim (10) is provided with an inner rim base (16) and an outer rim base (14) which respectively merge into an inner rim horn (18) and an outer rim horn (12). At least some sections of the outer rim base (14) are made of plastic, said plastic (30) being directly molded onto the wheel (1).

Abstract: A hydraulic device for pumping molten metal and/or controlling its flow, comprising an enclosure that forms internally a cylindrical chamber, for the connection of at least one first duct and one second duct for the passage of molten metal, within which a piston can slide hermetically in order to pump and/or control flow, an insulating cushion of inert gas being interposed between the piston and the molten metal, the piston being associated with an actuator for moving it with a reciprocating rectilinear motion.

Abstract: An apparatus for forming metal castings, particularly with hydraulic connection between the holding furnace and the mold and a method performed by the apparatus, the hydraulic connection comprising: at least one duct (36) for connecting the holding furnace (11), which contains the molten metal ready for molding, to one or more inlets (12) for introducing metal into the cavity (13) of a corresponding mold (14); and a piston pump (15), interposed between portions (20, 21) of the duct (36), for pumping a controlled quantity of metal through the one or more inlets into the cavity, the piston pump being connected to an electronic control unit (16).

Abstract: A mold particularly for road vehicle wheels, of the type comprising a lower mold part, an upper mold part and perimetric mold parts that form an impression to be filled with molten material, and comprising a distribution unit that is arranged below the lower mold part and is designed to be connected to at least one riser tube, which is shaped so as to form one or more slots shaped like a circular arc for injecting the molten material into the impression, the slots being arranged, when the mold is closed, at the outer front edge of the impression. The one or more slots are distributed circumferentially so as to allow a balanced injection with respect to the center of the impression.

Abstract: A wheel, particularly a light metal wheel, for motor vehicles, essentially consists of a spoke wheel center (20) and a wheel rim (10). In order to reduce weight and to increase the bending strength, which is of great significance in regard to contacts with curbstones and driving through potholes, profile segments (31) in the form of half-shell units, which form a continuous hollow chamber (41) in the direction of circumference, at least in sections, are provided in the area of an external base of the rim (14).

Abstract: A wheel, particularly a light metal wheel, for motor vehicles, essentially consists of a spoke wheel center (20) and a wheel rim (10). In order to reduce weight and to increase the bending strength, which is of great significance in regard to contacts with curbstones and driving through potholes, profile segments (31) in the form of half-shell units, which from a continuous hollow chamber (41) in the direction of circumference, at least in sections, are provided in the area of an external base of the rim (14).

Abstract: In order to fill a casting mould with a molten metal, the latter is caused to flow into through an annular chamber into the shaped cavity of a casting mould, such annular chamber discharging over the entire external periphery of the shaped cavity into the latter. The inflow of molten metal into the annular chamber is interrupted by means of a piston, which, being borne inside the annular chamber, is capable of sliding therein. The molten metal can be caused to flow across a large flow cross-section, which shortens the filling time even with reduced flow velocity.