Patent ID: 8863906

Claim:
An elevator, comprising: an elevator car; a counterweight; a set of hoisting ropes, the elevator car and counterweight suspended on the set of hoisting ropes; and one or more rope pulleys provided with one or more rope grooves adapted to receive at least one hoisting rope of the set of hoisting ropes; wherein at least one of the one or more rope grooves includes: a basic groove; a coating adhesively bonded to the basic groove; and an elastic area near a bottom of the basic groove; wherein the at least one of the one or more ropes grooves generally conforms to a semicircular shape, wherein the at least one of the one or more ropes grooves includes: a top surface adapted to receive one of the set of hoisting ropes; a substantially semicircular bottom surface; and groove sides; wherein the elastic area includes different material than the coating, wherein a thickness of the coating at a bottom of the at least one of the one or more rope grooves is substantially less than half of a thickness of the one of the set of hoisting ropes running in the at least one of the one or more rope grooves, wherein an elasticity of the coating at the groove sides of the at least one of the one or more rope grooves is less than the elasticity of the coating at a bottom of the at least one of the one or more rope grooves, wherein the set of hoisting ropes includes steel wire ropes, wherein the steel wire ropes have a diameter less than or equal to 10 mm, wherein surface wires of the steel wire ropes have a diameter less than about 1 mm, and wherein a combined minimum thickness of the coating and elastic area, at a bottom of the at least one of the one or more rope grooves, is about 0.5 mm.