Traction type elevator system
AssigneesMitsubishi Denki Kabushiki Kaisha, Tokyo Rope Mfg. Co., Ltd., Hakko Kouyu Co., Ltd.
InventorsKatsuhiko Suzuki, Seihachi Naganuma
Life of this patent
Estimating the term…
Abstract
A wire rope for use in a traction type elevator system is coated with a soft-solid agent or a greasy agent having a drip temperature higher than 55.degree. C. and exhibiting physical properties such that it is evaporated in an amount less than 1 weight percent at 105.degree. C. for an interval of eight hours and elevates the coefficient of friction or traction between the wire rope and the drive sheave when coated on the wire rope.
Claims19
A traction type elevator system comprising a wire rope place around a drive sheave including a soft-solid or greasy agent coated on the wire rope which increases the coefficient of friction or traction between the wire rope and the drive sheave, said agent having a drip point higher than 55 degrees C. and a rate of evaporation of less than 1 weight percent at 105 degrees C. during an interval of eight hours and being comprised of a thickener in an amount sufficient to provide said drip point and a suitable viscosity and at least one of a polybutene or a liquid polyisobutylene as a basic constituent.
In a traction type elevator system comprising a wire rope placed around a drive sheave, a method of increasing the traction between the wire rope and the sheave comprising treating said wire rope with an agent which increases the coefficient of traction between the wire rope and the drive sheave, said agent having a drip point higher than 55 degrees C. and is evaporated in an amount less than 1 weight percent at 105 degrees C. during an interval of eight hours and being comprised of a thickener in an amount sufficient to provide said drip point and a suitable viscosity and at least one of a polybutene or a liquid polyisobutylene as a basic constituent.
Dependencies are inferred from the claim text.