Patent ID: 8157058
Filing Date: 2012-04-17
Classification: B66B

Abstract:
1. A transmission means for at least one of driving and supporting an elevator car comprising: a longitudinally extending body having two remote ends; said body having a front side with a front side surface adapted to engage a drive pulley rotated by an elevator drive; said front side surface having formed therein several wedge-shaped grooves alternating with wedge ribs, said wedge grooves and said wedge ribs being arranged in parallel in a longitudinal direction of said body; said wedge grooves having a wedge groove angle and said wedge ribs having a wedge rib angle, wherein said wedge groove angles and said wedge rib angles are in a range of 80 degrees to 100 degrees, and wherein each said wedge groove angle is defined by a pair of intersecting planes corresponding with opposing flank surfaces of adjoining wedge ribs, one of the planes oriented parallel with one of the opposing flank surfaces and another of the planes oriented parallel with another of the opposing flank surfaces; said front side enhancing a cable force when running over an elevator pulley having a complementary surface maintaining said wedge groove angles and said wedge rib angles in the range of 80 degrees to 100 degrees; and said body further comprising a rear side including a slide layer, wherein said slide layer has better sliding characteristics than said front side when said slide layer is in contact with another pulley.