Patent ID: 6485383
Filing Date: 2002-11-26
Classification: B41J,F16H

Abstract:
A belt tensioner device comprising:a frame having an adjustable mount to a chassis; a pulley fork, biasingly mounted within the frame for selectively setting a predetermined belt tension; and a belt pulley mounted to the fork, wherein the frame and fork are co-associated and are fabricated of materials each having a complementary coefficient of thermal expansion (CTE) for counterbalancing respective displacements due to temperature excursions affecting the belt tension, wherein the device is for coupling a belt to a motor pulley shaft fixedly mounted on the chassis, wherein the chassis is fabricated of a material having a CTEchassis, the frame is fabricated of a frame material having a CTEframe which is greater than CTEchassis and the pulley fork is fabricated of a material having a CTEfork which is substantially less than the CTEchassis for a belt fabricated of a material having a CTEbelt which is negative and substantially less in magnitude than the CTEchassis.