Abstract: A rotary feed-through, designed to transfer a fluid between two entities in rotary motion with respect to one another. The rotary feed-through includes an inner cylindrical ring and an outer cylindrical ring, which are free to turn with respect to one another and provided with channels for passage of the fluid. The channels are connected via at least one annular space axially delimited by seal rings housed in a cylindrical seat. The cylindrical seat faces radially outwards or inwards and is axially delimited, on one side, by an axial abutment of the inner and outer cylindrical rings and, on the other side, by an axial abutment of a lid, a closing ring, or an intermediate ring. The seal rings are interference fitted to the inner or outer cylindrical ring and provided with an elastic portion for contact with the surface of the inner or outer cylindrical ring.

Abstract: The present invention relates to a system and method for measuring the length of a footprint of a tyre (10). The system comprises a first electronic device (1) and a second electronic device (2), each of which is configured at least to acquire, filter, store and sent data, and a processing unit (3), external to said electronic devices (1, 2), configured at least to receive and process the data sent by each electronic device (1, 2), to measure the length of a footprint on the basis of an angle (?) arranged between a first axis (B1) passing through the centre (O) of the tyre (10) and a first contact point (CP1) between a portion of said tyre (10) and the ground and a second axis (B2) passing through the centre of the tyre (10) and a second contact point (CP2) between said portion of said tyre (10) and the ground.

Abstract: The present invention relates to the system for measuring the slip of a tyre (10) with respect to a rim (20), on which said tyre (10) is mounted. In particular, said system comprises a first electronic device (1) and a second electronic device (2), each of which is configured at least to acquire, filter, store and send data, and a processing unit (3), external to said electronic devices (1, 2), configured at least to receive and process the data sent by each electronic device (1, 2), in order to measure said slip by measuring an angle (?) and comparing the value of this angle with respect to at a reference angle ?ref. The present invention also relates to method for measuring the slip of a tyre (10) with respect to a rim (20), on which said tyre (10) is mounted.

Abstract: A wheel rim comprising a peripheral structure for receiving a tire, and a central structure for coupling with a hub of the vehicle. The peripheral structure comprises, for each side of the wheel rim, a peripheral flange, a connecting wall on which the bead of the tire rests, and a connecting part. The peripheral structure includes a central well. The connecting part comprises a first curved region which joins the central well, and a second curved region between the first curved region and the connecting wall. The second curved region has a convex profile from the side of the wheel rim with the tire, and comprises a first curved surface joined to the connecting wall with a first radius of curvature, and a second curved surface between the first curved surface and the first curved region, with a second radius of curvature different from the first radius of curvature.

Abstract: A rotary joint is configured to transfer a fluid between two entities, one of which is in rotary motion with respect to the other. The rotary joint comprises a cylindrical internal element, apt to be fixed to the entity in rotary motion, and a plurality of annular external elements. The external elements comprise at least two head elements, at least two housing elements of respective gaskets, two bearing elements, and at least one fluid inlet. The fluid inlet is placed between said two bearing elements. Housing elements of respective gaskets are arranged externally to the bearing elements, and head elements are arranged externally to the housing elements. The gaskets define an annular shaped sealed area. The sealed area is accessible on one side through said fluid inlet and on the other side through at least one fluid passage channel passing through the body of said internal element.

Abstract: A process and a device of control and regulation of the pressure of tyres apt to ensure the adaptation of the footprint of a tyre to changes in the load applied thereto. The process includes the following steps: measuring the pressure of the tyre, measuring the footprint or the deflection of the tyre, determining a calculated value of footprint or of deflection in function of said optimum value of pressure, said calculated value of footprint or of deflection being determined by means of a correlation, based on experimental data, of values of pressure, footprint or deflection and applied load, if said calculated value of footprint or of deflection is different from respectively said measured value of footprint or of deflection: modifying the pressure of the tyre to reduce the difference between said measured value of pressure and said optimum value of pressure.

Abstract: The present invention concerns a tire (10) comprising a tread (11) provided with a base surface (14) and with a plurality of ribs (12), each rib (12) being provided with a front wall and a rear wall, and a shaped profile (15), wherein the shaped profile (15) has a section that defines at least one flat surface (17) of the shaped profile (15) which is parallel, or inclined at an angle ? up to 20°, to the surface of the head (16) of the rib and which is joined to the front wall of the rib (12) by means of a connecting surface (18), at least one sharp angle (19) of the shaped profile (15) and at least one front wall (23) of the shaped profile (15), which is joint to the base surface (14) of the tread (11) by means of a connecting surface (21).

Abstract: The present invention concerns un rotary joint (10, 10?) apt to transfer a fluid between two entities, one of which is in rotary motion with respect to the other, said rotary joint (10, 10?) being characterised in that it comprises a cylindrical internal element (11), apt to be fixed to said entity in rotary motion, and a plurality of annular external elements (14, 15, 17, 18), which can be coupled and which are self-centering, which can be fitted modularly, said external elements (14, 15, 17, 18) comprising at least two head elements (14), at least two housing elements (15) of respective gaskets (16), two bearing elements (17) and at least one fluid inlet element (18), said at least one fluid inlet element (18) being placed in an intermediate position between said two bearing elements (17), said at least two housing elements (15) of respective gaskets (16) being arranged externally with respect to said two bearing elements (17) and said at least two head elements (14) being arranged externally with respect t

Abstract: The present invention concerns a process and a device of control and regulation of the pressure of tyres, in particular for agricultural use, apt to ensure the adaptation of the footprint of a tyre to changes in the load applied thereto, comprising the following steps: measuring the pressure of the tyre, measuring the footprint or the deflection of the tyre, determining a calculated value of footprint or of deflection in function of said optimum value of pressure, said calculated value of footprint or of deflection being determined by means of a correlation, based on experimental data, of values of pressure, footprint or deflection and applied load, if said calculated value of footprint or of deflection is different from respectively said measured value of footprint or of deflection: modifying the pressure of the tyre to reduce the difference between said measured value of pressure and said optimum value of pressure.

Abstract: The present invention concerns a solid tyre (10?) comprising a plurality of circular layers of elastic material overlapping in the radial direction, said layers forming, proceeding from the centre towards the periphery of the tyre, an internal portion or heel (11), an intermediate portion or middle (12) and an external portion or tread (13), wherein, between said intermediate portion or middle (12) and said external portion or tread (13) a layer is interposed of indication of excessive wear (17), having a different colour with respect to that of said tread (13) and made of a material, or a mixture of materials, identical to that of said tread (13), except for the components needed to obtain a different colour.