A transmission belt has a body of a first elastomeric material, a plurality of cords, and a plurality of V-shaped ribs. The V-shaped ribs are arranged side by side and alternate with V-shaped grooves. The V-shaped ribs extend along the transversal axis of the belt. The belt has a first toothing and a second toothing formed by a plurality of teeth that extend obliquely to the transversal axis of the belt, thereby forming therewith respective helix (alpha, beta) angles different from 0°. Power transmission systems that include such a transmission belt are disclosed.

A transmission belt has a body of a first elastomeric material, a plurality of cords, and a plurality of V-shaped ribs. The V-shaped ribs are arranged side by side and alternate with V-shaped grooves. The V-shaped ribs extend along the transversal axis of the belt. The belt has a first toothing and a second toothing formed by a plurality of teeth that extend obliquely to the transversal axis of the belt, thereby forming therewith respective helix (alpha, beta) angles different from 0°. Power transmission systems that include such a transmission belt are disclosed.

A transmission belt includes a belt body, two spaced-apart mounting axles and a reinforcing unit. The belt body forms a loop that defines an inner space. The mounting axles and the reinforcing unit are embedded in the belt body. The reinforcing unit includes at least one cord that includes a plurality of winding segments and a plurality of connecting segments. The winding segments alternately extend around the mounting axles. Each of the connecting segments interconnects a corresponding pair of the winding segments that respectively extend around the mounting axles.

The invention relates to a drive belt (1) having a main body into which one or more tension strands (3) composed of para-aramid in cord construction are embedded, wherein each tension strand (3) has twisted plies each formed from at least one twisted yarn, and wherein the turning direction of the respective ply (first twist) is the opposite of the turning direction of the cord (final twist).

It is a feature of the invention that the tension strands (3) each have at least four plies, wherein the twist factor TM.sub.1 of the plies (first twist) is between 4.5 and 5.4, and the twist factor TM.sub.2 of the cord (final twist) is between 2.7 and 3.8, and the ratio of the twist factor of the plies to the twist factor of the cord (TM.sub.1/TM.sub.2) is between 1.3 and 1.5.

The invention relates to a drive belt (1) having a main body into which one or more tension strands (3) composed of para-aramid in cord construction are embedded, wherein each tension strand (3) has twisted plies each formed from at least one twisted yarn, and wherein the turning direction of the respective ply (first twist) is the opposite of the turning direction of the cord (final twist).

It is a feature of the invention that the tension strands (3) each have at least four plies, wherein the twist factor TM.sub.1 of the plies (first twist) is between 4.5 and 5.4, and the twist factor TM.sub.2 of the cord (final twist) is between 2.7 and 3.8, and the ratio of the twist factor of the plies to the twist factor of the cord (TM.sub.1/TM.sub.2) is between 1.3 and 1.5.

The present invention relates to a cogged V-belt, including a cog portion containing cog ridges and cog valleys, and having a belt thickness of 19 to 36 mm and a cog height of 14 to 19 mm, in which the cog valley has a cross-sectional shape including a bottom portion formed by combining a plurality of continuous arcs and side walls of the cog valley, in which the plurality of arcs has curvature radius decreasing as a distance from a deepest portion of the cog valley increases, and includes a first arc passing through the deepest portion of the cog valley, having a diameter larger than a virtual circle tangent to the deepest portion and the both side walls and having a curvature radius of 7 to 10 mm.

The present invention relates to a cogged V-belt, including a cog portion containing cog ridges and cog valleys, and having a belt thickness of 19 to 36 mm and a cog height of 14 to 19 mm, in which the cog valley has a cross-sectional shape including a bottom portion formed by combining a plurality of continuous arcs and side walls of the cog valley, in which the plurality of arcs has curvature radius decreasing as a distance from a deepest portion of the cog valley increases, and includes a first arc passing through the deepest portion of the cog valley, having a diameter larger than a virtual circle tangent to the deepest portion and the both side walls and having a curvature radius of 7 to 10 mm.

Disclosed herein is an assembly, method of assembling, and kit for assembling an assembled flexible helical belt that is mounted within a mounting space defined by a continuous mechanical constraint of a device. Embodiments of the flexible helical belt include a flexible helical belt that has a plurality of belt teeth, where some of the belt teeth are each pierced by a through hole which extends through the respective belt tooth and where the flexible helical belt is of sufficient length such that, when the flexible helical belt is mounted within the intended mounting space, the flexible helical belt overlaps itself by at least one rotation such that each through hole is transversely aligned with at least one other through hole, enabling a transverse compression device to be fitted through the through holes, creating a transverse compressive force on the flexible helical belt to form a single continuous drive belt.

Disclosed herein is an assembly, method of assembling, and kit for assembling an assembled flexible helical belt that is mounted within a mounting space defined by a continuous mechanical constraint of a device. Embodiments of the flexible helical belt include a flexible helical belt that has a plurality of belt teeth, where some of the belt teeth are each pierced by a through hole which extends through the respective belt tooth and where the flexible helical belt is of sufficient length such that, when the flexible helical belt is mounted within the intended mounting space, the flexible helical belt overlaps itself by at least one rotation such that each through hole is transversely aligned with at least one other through hole, enabling a transverse compression device to be fitted through the through holes, creating a transverse compressive force on the flexible helical belt to form a single continuous drive belt.

The invention relates to an apparatus for manufacturing at least one drive belt, comprising a tubular shaping body having a first inner cavity which extends in the longitudinal direction of the shaping body over the entire or predominant length of the shaping body and is surrounded circumferentially by a wall of the shaping body, wherein the inner side of the wall of the shaping body facing the first inner cavity has a shaping surface for abutment and shaping of the drive belt to be produced during the manufacturing process. The invention also relates to a method of manufacturing at least one such drive belt by means of such an apparatus.