Patent ID: 9212029
Filing Date: 2015-12-15
Classification: B66B,B66D,F16H,Y10T

Abstract:
1. A traction sheave elevator, comprising: an elevator car; and a traction sheave that moves the elevator car via elevator ropes, the traction sheave includes one or more rope grooves corresponding to a number of elevator ropes, each rope groove includes at least two different materials in contact with the corresponding elevator rope, of which a first material is a hard and inflexible material, and a second material is a flexible material, wherein the second material is fitted into the rope groove of the traction sheave and supports the elevator rope, whereby a radial force exerted on the second material by the elevator rope is smaller than a resulting radial force exerted on the elevator rope by the second material, and wherein the second material is narrower in width than the rope groove, whereby air gaps between sidewalls of the second material and sidewalls of the rope groove are formed when the second material is fitted symmetrically in the rope groove, which air gaps accommodate an expansion of the second material when the elevator rope presses the second material towards a base of the rope groove.