US 7,032,371 B2 · Synthetic fiber rope for an elevator

Abstract

A synthetic rope for an elevator having improved resistance to compression and abrasion is provided and comprises a plurality of strands forming layers of the rope, each strand formed from a plurality of pre-twisted strands made from high modulus synthetic filaments. One or more of the strands or layers of strands may be impregnated with a lubricant, such as polytetrafluoroethylene, to reduce the abrasion among the strands and substrands, and increase the service life of the rope. The exterior of the rope may be covered by a jacket that provides for traction with the drive sheave. An elevator system comprising the claimed rope is also provided.

Claims15

Dependent claims

A rope for an elevator comprising:

an inner layer of three strands laid helically around one another;
a middle layer of six strands laid helically around the inner layer;
and an outer layer of twelve strands laid helically around the middle layer;
wherein each strand comprises a plurality of pre-twisted substrands, each substrand comprising a plurality of yarns twisted together, wherein each yam is twisted about its longitudinal axis in a first direction, and the plurality of yams are twisted about each other in a second direction to form each pre-twisted substrand, and wherein the yams comprise high modulus synthetic filaments.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/354,378Filed 30 Jan 2003 · us provisional application

Priority

30 Jan 2002

Published

US 2003/0226347 A111 Dec 2003

Granted

25 Apr 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

D07B 1/142
Comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases: for ropes or rope components built-up from fibrous…
B66B 7/06
Other common features of elevators: arrangements of ropes or cables
D07B 1/025
Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics: comprising high…
D07B 2201/1036
Characterised by the number of strands: nine or more strands respectively forming multiple layers

Synthetic fiber rope for an elevator

Life of this patent

Synthetic fiber rope for an elevator

Life of this patent

Abstract

Claims15