Abstract: An agricultural roller comprises a tubular support and a series of pneumatic tyres mounted on the support. Each pneumatic tyre of the series has a respective uninflated envelope. The roller further comprises a series of tyres mounted on the support and interleaved in the series of pneumatic tyres. Each tyre has a respective envelope. The tyres are smaller than the pneumatic tyres while their envelope is narrower.

Abstract: A press wheel comprises a rigid body and a semi-tubular tire. The tire comprises a flexible envelope with a sole portion through which the tire is mounted on the rigid body, a tread portion and a pair of sidewalls each one connecting the sole to the tread. The sidewalls extend, at least partially, along a generally concave profile, viewed from the exterior of the tire.

Abstract: A non-inflatable tire for an agricultural implement, including a sole, a tread, and a pair of sidewalls connecting the sole to the tread is provided. A first sidewall extends from the sole to the tread, while the second includes an internal portion which extends from the sole to the tread and an external portion projecting from the tread. The first sidewall and the tread are designed so as to jointly hold the external portion of the second sidewall in line with the internal portion.

Abstract: An agricultural tool used to form furrows includes a generally cylindrical support and a plurality of tires. Each tire includes a sole by way of which the tire is mounted on the support, a tread opposite the sole (3) and two sidewalls that connect the tread to the sole. The sole, the tread (5) and the sidewalls jointly form a deformable casing. The tread of at least one of the plurality of tires has a generally domed shape. The sidewalls of this tire are generally inclined radially. The domed shape of the tread and the inclination of the sidewalls are such that the deformation of the casing urges the sole axially outward.

Abstract: An agricultural machine tool includes a wheel body which includes a hub, a rim and at least two arms which each connect the hub and the rim to each other. At least one aperture is provided between the two arms and the rim, and has a closed contour. The tool includes a component which forms an accessory having a profiled portion having a shape which generally corresponds to the closed contour, and a generally superficial portion which terminates the profiled portion. The profiled portion is introduced at one side of the wheel body into the aperture, closing the aperture by form-fitting cooperation. A set of fixing members ensures the retention of the component in a final position, in which the superficial portion moves into a flush state with the arms, at least in the region of the contour.

Abstract: Pneumatic tire 1 for an agricultural machine, having an axis of revolution XX and comprising a tread 7, a sole 11 situated opposite the tread 7, and two sidewalls 13, 15 connecting the tread 7 to the sole 11. The tread 7, the sole 11 and the two sidewalls 13, 15 together form a casing 17 defining a chamber 19 inside the pneumatic tire 1. At least one of the sidewalls 13, 15 comprises, in this order and in succession in a direction oriented radially from the axis of revolution XX to the outside, a proximal portion 131, an intermediate portion 133 and a distal portion 135. In the unloaded state, the intermediate portion 133 projects into the chamber 19 in a direction substantially parallel to the axis of revolution XX.

Abstract: The semi-hollow pneumatic tire has an axis of revolution and comprises a sole mountable on the periphery of a rotary support, a tread opposite the sole, and two sidewalls each connecting the sole and the tread so as to form together a cover which defines an uninflated chamber inside the pneumatic tire. The tread has a concave profile according to a plane passing through the axis of revolution, and the pneumatic tire comprises two annular ridges which extend, respectively, the two sidewalls in the outer radial direction and which are connected to two opposite ends of the tread, the two annular ridges defining, respectively, two principal directions which intersect at an acute angle so that, when the pneumatic tire comes into contact with soil, by being subjected to a vertical load, the two annular ridges move closer together locally.

Abstract: A tool for working in fields includes a first flange and a second flange which mount one on the other, forming a wheel body. The first flange includes a central portion, a generally annular peripheral portion and at least one arm which connect(s) the central portion and the peripheral portion to each other. The second flange is homologous to the peripheral portion of the first flange. In the assembled state, the wheel body has a rim which is formed together by the peripheral portion of the first flange and the second flange and a hub which is formed by the central portion of the first flange.

Abstract: A tire for a furrow press roller comprises a sole via which the tire is mounted on a field roller support, a tread opposite to the sole, and two sidewalls connecting the tread to the sole. The sole, the tread and the sidewalls together delimit a non-inflatable chamber. The tread comprises at least one crest and two shoulders each connecting the crest to a respective sidewall. The chamber extends partially at least laterally under the shoulders and radially into the crest.

Abstract: A tool for working in fields includes a first flange and a second flange which mount one on the other, forming a wheel body. The first flange includes a central portion, a generally annular peripheral portion and arms which connect the central portion and the peripheral portion to each other. The second flange is homologous to the first flange. In the assembled state, the wheel body has a rim which is formed together by the peripheral portion of the first flange and the homologous peripheral portion of the second flange and a hub which is formed by the central portion of the first flange. The central portion of the second flange receives the hub which is formed by the central portion of the first flange.

Abstract: Pneumatic tire 1 for an agricultural machine, having an axis of revolution XX and comprising a tread 7, a sole 11 situated opposite the tread 7, and two sidewalls 13, 15 connecting the tread 7 to the sole 11. The tread 7, the sole 11 and the two sidewalls 13, 15 together form a casing 17 defining a chamber 19 inside the pneumatic tire 1. At least one of the sidewalls 13, 15 comprises, in this order and in succession in a direction oriented radially from the axis of revolution XX to the outside, a proximal portion 131, an intermediate portion 133 and a distal portion 135. In the unloaded state, the intermediate portion 133 projects into the chamber 19 in a direction substantially parallel to the axis of revolution XX.

Abstract: An agricultural machine having a first frame and a roller with a tube mounted about a first axis. A second frame is connected to the first frame and a wheel, which includes a rim mounted about a second axis. The wheel has a tire and the roller has a covering around the tube. The covering and the tire tread have moldings defining a pattern element repeated in a transverse direction parallel to the first axis and to the second axis, respectively. The pitch of transverse repeat of the pattern element of the roller and the pitch of transverse repeat of the pattern element of the wheel are equal to the nearest 10%. The pattern elements define ribs the height of which on the roller and the height of which on the wheel are equal to the nearest 90%.

Abstract: A pneumatic tire of the semi-hollow type includes a casing having an uninflated inner volume and including an inner wall provided with a retaining bead and a convex outer wall forming the tread of the tire, the inner wall and the outer wall of the tire being connected by two annular borders. The inner wall of the tire is concave so as to surmount a convex outer wall of the peripheral seat of a rim of a wheel, this outer wall being provided with a peripheral slot adapted to accommodate the retaining bead of the tire.

Abstract: This roller (10) comprises a tubular support structure (14) of horizontal axis (X-X) adapted to be rotatably mounted on a tractor-drawn support frame. A series of semi-hollow tyres with a dome-shaped profile are threaded onto this tubular support structure and enable a series of parallel furrows to be formed in the earth. The tubular support structure (14) comprises a framework formed by a plurality of bars (30) joined together by two circular end cheeks (32) between which these bars extend axially. The tyres (12) are mounted on the bars of the framework, forming with the latter an assembly that is connected for rotation and translation.

Abstract: A pneumatic tyre of the semi-hollow type includes a casing having an uninflated inner volume and including an inner wall provided with a retaining bead and a convex outer wall forming the tread of the tyre, the inner wall and the outer wall of the tyre being connected by two annular borders. The inner wall of the tyre is concave so as to surmount a convex outer wall of the peripheral seat of a rim of a wheel, this outer wall being provided with a peripheral slot adapted to accommodate the retaining bead of the tyre.

Abstract: This tyre (14) is of the semi-hollow type for agricultural machinery, notably for a machine comprising a roller provided with a series of tyres mounted on a horizontal tube (12). Each tyre comprises a central sleeve (26) and at least one tread portion with a dome shaped profile comprising a tread (24) connected to the sleeve (26) by two sidewalls (28, 30) so as to define a hollow annular space (32) of reduced cross section relative to the cross section of the dome shaped profile. It further comprises a plurality of peripheral grippers (34) formed to project from the tread (24) and distributed in the circumferential direction on the top of the dome shaped profile. Alternatively, the tyre may be fitted to an individual wheel.

Abstract: An endless flexible belt track produced from an elastomer comprises a steel cable (30) spirally wound in the thickness of the belt (12) and outer layers embedded in the thickness of the belt and formed successively from the turns (34) of the cable toward the outside, by: a first oblique layer (36) formed from wires that in turn form a first acute angle (A) to a perpendicular to the turns of the cable; a transversal layer (38) formed from wires that in turn form a right angle to the turns of the cable; and a second oblique layer (40) formed from wires that in turn form a second acute angle (B) to a perpendicular to the turns of the cable, the second acute angle (B) extending in the opposite direction to the first acute angle (A). Application to all-terrain vehicles.

Abstract: The drive device of the invention comprises a ready to fit unit or kit, for installing in a detachable manner on one side of a chassis of a motor vehicle. The unit comprises a flexible crawler looped round a drive wheel adapted to be mounted on a drive hub of the vehicle and round a tension wheel carried by a support frame, which comprises an internal part adapted to be secured in a detachable manner on the chassis remote from the drive shaft, an intermediate part adapted to carry the tension wheel and an external part carrying a bearing for the drive wheel. The invention is particularly of use for transforming vehicles with four drive wheels for crawler operation.