Power transmission belt

Abstract

Abstract AN EXTENSIBLE BELT, PARTICULARLY A POWER TRANSMISSION BELT, CONTAINING A TENSION SECTION OF LONGITUDINALLY EXTENDING INDIVIDUAL TEXTILE CORDS WHICH INCLUDE SYNTHETIC THERMOPLASTIC FILAMENTARY MATERIAL IN THEIR STRUCTURE. THE CORDS ARE SIMULTANEOUSLY RELAXED AND HEAT-TREATED IN THE ABSENCE OF APPLIED TENSION AND ARE THEREBY CAPABLE OF AN INITIAL STRETCH OR ELONGATION WITHIN CERTAIN DEFINED LIMITS AND A SUBSEQUENT RECOVERY OF AT LEAST A SUBSTANTIAL PORTION OF THE INITIAL STRETCH. THE CORDS ARE SUBSEQUENTLY INCORPORATED INTO THE BELT AND THE VULCANIZED BELT IS THEREBY MADE EXTENSIBLE WITHIN CERTAIN DEFINED LIMITS AND CAPABLE OF BEING STRETCHED IN ORDER TO BE INSTALLED IN A BELT DRIVE ASSEMBLY. AFTER THE INITIAL STRETCH, THE BELT SUBSE- QUENTLY RETRACTS OR RECOVERS TO THE DRIVING POSITION WITH RESPECT TO THE PULLEYS AND RETAINS SUFFICIENT TENSION TO FRICTIONALLY ENGAGE THE PULLEY SURFACES AND PERFORM ITS DRIVING FUNCTION. THE SELF-TENSIONING BELT OF THIS INVENTION ELIMINATES THE NEED FOR TENSIONING DEVICES OR MEANS TO ADJUST THE DRIVE TO PROVIDE THE PROPER TENSION REQUIRED WHEN CONVENTIONAL TRANSMISSION BELTS ARE EMPLOYED AND IS PARTICULARLY USEFUL IN APPLICATIONS INVOLVING V-TYPE TRANSMISSION BELTS WHICH ARE DESIGNED TO OPERATE WITH GROOVED PULLEYS OR SHEAVES.

Inventors

• 👤 Sidney R Fix

Bibliographic Details