Elevator load bearing member with conductive adhesive

Patent metadata

Field	Value
Publication number	US-12522473-B2
Application number	US-202217902409-A
Country	US
Kind code	B2
Filing date	Sep 2, 2022
Priority date	Sep 2, 2022
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

An elevator load bearing member includes a plurality of load bearing wires, a polymer-based conductive adhesive coating on each of the plurality of the wires, and a jacket surrounding the wires. The jacket is adhered to the wires by the polymer-based conductive adhesive coating. A method of making a load bearing member for an elevator system is also disclosed.

First claim

We claim:

1 . An elevator comprising:
a load bearing member; an elevator car; one or more sheaves; a counter weight associated with the load bearing member such that the elevator car and the counterweight are suspended by the loading bearing member via the one or more sheaves; wherein the load bearing member comprises:
a plurality of load bearing wires arranged in a bundle;
a polymer-based conductive adhesive coating on each of the plurality of load bearing wires; and
a jacket surrounding the plurality of load bearing wires, wherein the jacket is adhered to the plurality of load bearing wires by the polymer-based conductive adhesive coating; and
wherein the polymer-based conductive adhesive coating either comprises an intrinsically conductive polymer or comprises a non-conductive polymer adhesive and less than about 5% by weight of a conductive element.

2 . The elevator of claim 1 , wherein the intrinsically conductive polymer includes one or more of polyacetylene (PA), polyaniline (PAni), polypyrrole (PPy), polythiophene (PTh), poly (3,4-ethylene-dioxythiophene) (PEDOT), and poly (phenylvinylene) (PPV).

3 . The elevator of claim 1 , wherein the intrinsically conductive polymer is functionalized to facilitate adhesion of the jacket to the plurality of load bearing wires.

4 . The elevator of claim 1 , wherein the conductive element includes one or more of carbon nanotubes, graphene, and metal powder.

5 . The elevator of claim 1 , wherein the non-conductive polymer adhesive includes at least one of an epoxy, a urethane, or an acrylate.

6 . The elevator of claim 1 , wherein the conductive element comprises between about 0.5% and about 1% by weight of the polymer-based conductive adhesive coating that is comprised of the non-conductive polymer adhesive and the conductive element.

7 . The elevator of claim 1 , wherein an electrical conductivity of the polymer-based conductive adhesive coating is at least 10 siemens.

8 . The elevator of claim 1 , wherein the plurality of load bearing wires are steel wires.

9 . The elevator of claim 1 , wherein the load bearing member has one end associated with the elevator car and an opposite end associated with a counterweight.

10 . The elevator of claim 1 , wherein the plurality of load bearing wires are wrapped or twisted around one another within the bundle.

11 . The elevator of claim 10 , wherein the plurality of load bearing wires are comprised of steel or aluminum or alloys thereof.

Assignees

• Otis Elevator Co

Inventors

• Guilani Brad
• Brown Ricardo

Classifications

• D07B1/0613

  the reinforcing cords being characterised by the rope configuration · CPC title

• D07B1/145

  comprising elements for indicating or detecting the rope or cable status · CPC title

• D07B2501/2007

  Elevators · CPC title

• D07B2201/2012

  comprising polymers · CPC title

• D07B2301/45

  for diagnosing · CPC title