초록

A power transmission belt of the V-block type with polymeric portions that define frictional driving surfaces. Extended polymeric portions are oriented transversely to the belt and are deflected such that successive blocks are in pressing contact with each other.

대표청구항 ▼

In a power transmission belt of the type having a plurality of V-blocks successively attached to a generally flat belt type load-carrying member at a nominal pitch spacing, each block having a high modulus reinforcement and two polymeric portions that each form an oppositely facing V-side with a fri

In a power transmission belt of the type having a plurality of V-blocks successively attached to a generally flat belt type load-carrying member at a nominal pitch spacing, each block having a high modulus reinforcement and two polymeric portions that each form an oppositely facing V-side with a frictional driving surface extending above and below an equatorial bending plane of the load-carrying member, successive blocks tilting relative to each other as the belt bends such that portions of successive blocks above the equatorial bending plane move away from each other, and portions of successive blocks below the equatorial bending plane move toward each other, the improvement comprising: each polymeric portion having two oppositely facing and spaced apart reactive surface portions near the equatorial bending plane that are transversely oriented to the load-carrying member, the reactive surface portions between each successive polymeric portion is partially deflected and in pressing contact against each other.