Tension member for elevator system belt

Patent metadata

Field	Value
Publication number	US-11427439-B2
Application number	US-201815958606-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 20, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A belt for an elevator system includes a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of load carrying fibers, the plurality of load carrying fibers including a plurality of aromatic polyester based fibers. A jacket material at least partially encapsulates the plurality of tension members.

First claim

What is claimed is:

1. A belt for an elevator system, comprising:
a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of load carrying fibers, the plurality of load carrying fibers including a plurality of aromatic polyester based fibers; and
a jacket material at least partially encapsulating the plurality of tension members;
wherein the plurality of load carrying fibers further includes ultrahigh molecular weight polypropylene fibers;
wherein the plurality of tension members are formed via a pultrusion process with the plurality of load carrying fibers impregnated with a matrix material;
wherein the plurality of load carrying fibers includes at least 50% aromatic polyester fibers.

2. The belt of claim 1 , wherein the aromatic polyester fibers are formed from a liquid crystal polymer material.

3. The belt of claim 1 , wherein the jacket materials are selected from the group consisting of polyurethanes, polyesters, ethylene propylene diene elastomer, chloroprene, chlorosulfonyl polyethylene, ethylene vinyl acetate, polyamide, polypropylene, butyl rubber, acrylonitrile butadiene rubber, styrene butadiene rubber, acrylic elastomer, fluoroelastomer, silicone elastomer, polyolefin elastomer, styrene block and diene elastomer, natural rubber and any combination of at least of two compound.

4. The belt of claim 1 , wherein the matrix material is a polyurethane, vinylester, or epoxy material.

5. An elevator system, comprising:
a hoistway;
an elevator car disposed in the hoistway and movable therein;
a belt operably connected to the elevator car to suspend and/or drive the elevator car along the hoistway, the belt including:
a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of load carrying fibers, the plurality of load carrying fibers including a plurality of aromatic polyester based fibers; and
a jacket material at least partially encapsulating the plurality of tension members;
wherein the plurality of load carrying fibers further includes ultrahigh molecular weight polypropylene fibers;
wherein the plurality of tension members are formed via a pultrusion process with the plurality of load carrying fibers impregnated with a matrix material;
wherein the plurality of load carrying fibers includes at least 50% aromatic polyester fibers.

6. The elevator system of claim 5 , wherein the aromatic polyester fibers are formed from a liquid crystal polymer material.

7. The elevator system of claim 5 , wherein the matrix material is a polyurethane, vinylester, or epoxy material.

8. A tension member for an elevator system, comprising a plurality of load carrying fibers, the plurality of load carrying fibers including a plurality of aromatic polyester based fibers;
wherein the plurality of load carrying fibers further includes ultrahigh molecular weight polypropylene fibers;
wherein the tension member is formed via a pultrusion process with the plurality of load carrying fibers impregnated with a matrix material;
wherein the plurality of load carrying fibers includes at least 50% aromatic polyester fibers.

9. The tension member of claim 8 , wherein the aromatic polyester fibers are formed from a liquid crystal polymer material.

10. The tension member of claim 8 , wherein the matrix material is a polyurethane, vinylester, or epoxy material.

Assignees

• Otis Elevator Co

Inventors

• Zhao Chen Qian

Classifications

• D07B2205/2042

  High performance polyesters, e.g. Vectran · CPC title

• D07B2201/2046

  comprising fillers · CPC title

• C08L2205/16

  Fibres; Fibrils · CPC title

• C08L77/00

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• B66B7/062 Primary

  Belts · CPC title