Abstract: Self-locking nipple for attaching wheel spoke to wheel part. The self-locking function of the nipple is created by deforming the nipple body in a rotationally symmetrical way and over a predetermined axial distance, such that such a narrowed part is created in the internal screw-thread of the nipple which is rotationally symmetric with respect to the longitudinal axis of the nipple and extends over only one to two windings of the internal screw-thread.

Abstract: The invention concerns a device with a mobile part comprising two crowns (1 and 13) rigidly coupled with rods passing through the hub (7) outside the bearings (6). The springs (20) press that frame against the fixed ring (10) such that the pins (21) are engaged in the holes (22). The lever (15) is provided with cam-branches (18) supported by the ring (23). When the lever (15) pivots about the spindles (19) the wheel is blocked or released.

Abstract: The cutting device with movable punch is of the type which has a body placed within a seat (2) which is formed in the structure (3) of the machine, and also a fixed die (4), a movable upright (5) and an elastic element (6). In particular the body is constituted by a punch placed in the central position within the seat (2), a shaped element (8) coaxial with the punch and a blank-holder (9) which is integral with the terminal lower part of the shaped element (8).

Abstract: There is disclosed a process and apparatus for producing reinforcement profiles on sheet metal panels wherein the profiles are obtained with the same metal sheet which constitutes the body of the finished shelf. The profiles are obtained by performing a drawing action so as to create a channel of inverted "C" shape and then performing a successive bending action capable of causing the reciprocal approach of the ends of its two parallel sides, obtaining, at the end of the operation, a shape in the form of an inverted isosceles triangle which constitutes the reinforcement profile.

Abstract: A blank holder having variable assembly is used in a folding machine for the production of a sheet panel. It comprises a central element (3), a plurality of additional elements (6), a pair of expander elements (4), two extremity members (7), at least one programmable carriage (15) movable along the blank holder which is operable to modify the length of the blank holder.

Abstract: The load bearing ball of the type which has a main ball (1) of substantially high diameter on which the loads rest, in turn rests on a plurality of balls (2) of diameter substantially smaller than the diameter of ball (1), which are placed on the bottom (3) of a suitable container (4), the latter having a substantially hemispheric shape. A main feature of the invention consists of the particular structure capable of closing the container and capable of holding the several balls in the interior of the container. This structure serves also for the purpose of fastening the main large ball to the border of the opening (6) formed on the supporting plane (7) of the same load bearing ball.

Abstract: A device for moving blades of a press used for bending sheets, has blades supported and placed in motion by a bending block which is movable in the vertical direction with respect to two counter blades with the sheet to be bent being placed between the two counter blades. For the purpose of imparting motion to the bending block with respect to the counter blades, there is provided a track along which the bending block rolls. There are also provided two connecting rods, the upper end of which is hinged to the lower part of the bending block. The two rods are pivoted in the lower part to an arm (7) which is placed substantially radially and which is integral with a cylinder (8). Cylinder (8) is integral with a second arm (9) which is connected with a fluid dynamic cylinder. There may also be provided a second fluid-dynamic cylinder which forms with the first fluid-dynamic cylinder a structure having cylindrical symmetry.

Abstract: A device for supporting slabs during the phases of punching and in general operations of plastic deformation has a plurality of jacks (6) placed under the slab in a position corresponding to at least a substantial portion of the surface of the slab during all the operations being carried out on the slab. These jacks are normally placed in contact with the lower surface of the slab and are capable of lowering for the purpose of avoiding interference with the portions of the slabs which have already been plastically deformed.