Abstract: An endless power transmission belt having a toothed compression section and method of making the same are provided, the belt being formed substantially of polymeric materials and comprising a tension section, a compression section, and a load-carrying section disposed between the tension section and the compression section and having a transverse centerline, the compression section having an outer layer and an inner layer joined to the outer layer and defining an interface therewith that is substantially uniformly spaced from the load-carrying section by the outer layer throughout substantially the entire width and length of the belt. The compression section has an inner surface in the form of alternating transverse teeth and grooves with the grooves respectively defining the roots of the teeth.

Abstract: An endless power transmission belt having a toothed compression section and method of making the same are provided, the belt being formed substantially of polymeric materials and comprising a tension section, a compression section, and a load-carrying section disposed between the tension section and the compression section and having a transverse centerline, the compression section having an outer layer and an inner layer joined to the outer layer and defining an interface therewith that is substantially uniformly spaced from the load-carrying section by the outer layer throughout substantially the entire width and length of the belt. The compression section has an inner surface in the form of alternating transverse teeth and grooves with the grooves respectively defining the roots of the teeth. The inner layer has a thickness from the interface to the tips of the teeth thereof that is approximately the same as the thickness of the outer layer.

Abstract: An endless power transmission belt made primarily of an elastomeric material is provided and has a load-carrying section, a ribbed section adjacent the load-carrying section with the ribbed section having a plurality of ribs and the ribs being defined by a plurality of alternating projections and recesses, and a knit cover fabric bonded against the ribs and defining the inside surface of the belt with the knit fabric affording extensibility in a plurality of directions to assure the belt is particularly adapted to be operated in associated sheaves with minimum stresses being imposed thereon due to the cover fabric.