Abstract: Tread (2) of a radial tire for a heavy vehicle. The tire alternatingly rolls in laden and unladen states on descent and ascent, respectively. Tread (2) has total width WT and comprises first median portion (21) having median width Wc, where 0.2WT?Wc?0.5WT. Tread (2) is axially delimited by second and third lateral portions (22, 23) having respective lateral widths (WS2, WS3) at least equal to 25% and at most equal to 40% of total width WT. Angle A51 of leading face (51) of every element in relief (31) of first median portion (21) is strictly greater than angle A61 of trailing face (61) of said element in relief (31). Angle (A52, A53) of leading face (52, 53) of every element in relief (32, 33) of each of the second and third lateral portions (22, 23) is strictly less than angle (A62, A63) of trailing face (62, 63) of said element in relief (32, 33).

Abstract: Materials make it possible to generate mechanical coupling in elastomeric compositions, of use especially for the manufacture of tyre treads. In particular, a tread comprises a composite material based on an elastomeric matrix, a crosslinking system, a reinforcing filler and oriented short fibres.

Abstract: Tread (2) of a radial tire for a heavy vehicle. The tire alternatingly rolls in laden and unladen states on ascent and descent, respectively. Tread (2) has total width WT and comprises first median portion (21) having median width Wc, where 0.2WT?Wc?0.5WT. Tread (2) axially delimited by second and third lateral portions (22, 23) that have respective lateral widths (WS2, WS3) at least equal to 25% and at most equal to 40% of total width WT. Angle A51 of leading face (51) of every element in relief (31) of first median portion (21) is strictly less than angle A61 of trailing face (61) of said element in relief (31). Angle (A52, A53) of leading face (52, 53) of every element in relief (32, 33) of each of second and third lateral portions (22, 23) is strictly greater than angle (A62, A63) of trailing face (62, 63) of said element in relief (32, 33).

Abstract: A vehicle (3) comprising at least two axles (6, 7, 8) fitted with at least two tires the axis of rotation of which are always mutually parallel from one axle to another. Each axle (6, 7, 8) bears at least 10% of the load of the vehicle and at least two axles (6, 7, 8) bear different loads during running. Also disclosed is a method for distributing the load between said at least two axles.

Abstract: A vehicle (3) comprising at least two axles (6, 7, 8) fitted with at least two tires the axis of rotation of which are always mutually parallel from one axle to another. The tires of at least one axle (7) have a cornering stiffness greater than that of the tires of another axle (6, 8).

Abstract: A tread and a tire for a heavy vehicle, and a molding element therefor, this tread comprising a plurality of sipes of circumferential overall orientation and of width (Li), each of these sipes extending into the depth of the tread over a depth (P) that is less than the mean thickness (E) of the tread, each sipe being extended radially inwards by a channel having lateral walls that, when the tread has become partially worn, delimit a new groove, these lateral walls connecting to a bottom , each sipe connecting together a plurality of drainage wells, each formed in the thickness of the tread opening via a first opening onto the tread surface the maximum dimension of which is at least equal to twice the width of the sipe and via a second opening into a channel; for each sipe of circumferential overall orientation, there is at least one drainage well in the contact patch and, in the continuation of each drainage well, a protrusion on the bottom of the channel.

Abstract: A tyre for heavy goods vehicle comprising a tread with a thickness E having a tread surface, an asymmetrical sculpture design over at least one thickness equal to 30% of the thickness of the tread, forming an outer portion of axial width LE to be positioned axially towards the outside of a vehicle when the tyre is fitted and an inner portion of axial width LI situated in the axial extension of the outer portion, the inner portion and the outer portion separated by a groove of generally circumferential orientation, the outer portion of the tread comprising, in the circumferential direction, a succession of rigid strips of circumferential width D11 and of axial width LE having no groove or cavity opening onto the tread surface in the new state and of flexible strips of circumferential width D12 and of axial width LE provided with grooves extending over the whole circumferential width D12 of these flexible strips, the rigid strips having a circumferential width D11 at least equal to 7% of the axial width LE of t

Abstract: A vehicle (3) comprising at least two axles (6, 7, 8) fitted with at least two tires the axis of rotation of which are always mutually parallel from one axle to another. Each axle (6, 7, 8) bears at least 10% of the load of the vehicle and at least two axles (6, 7, 8) bear different loads during running. Also disclosed is a method for distributing the load between said at least two axles.

Abstract: A vehicle (3) comprising at least two axles (6, 7, 8) fitted with at least two tires the axis of rotation of which are always mutually parallel from one axle to another. The tires of at least one axle (7) have a cornering stiffness greater than that of the tires of another axle (6, 8).

Abstract: An electronic variable speed drive including a cabinet having an opening door, a power system supplied with power from an AC line voltage and delivering a voltage under the control of solid state power switches and an electronic control system controlling the solid state switches. The cabinet contains, behind the door, a protective cover which protects the electronic control system and the power system which are disposed behind it. When the door is open, the protective cover protects users from the control and power systems.