US 8,052,820 B2Granted

Method of making a load bearing member for an elevator system

AssigneeOtis Elevator Company

InventorsHugh O'Donnell, Hubert E. Goeser

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Abstract

A method of making a load bearing member (30) for an elevator system (20) includes placing at least one tension member (32) adjacent one side (60) of a first layer (36) of a polymer material. A second layer (38), comprising a urethane in a disclosed example, is added adjacent to at least the one side (60) of the first layer (36) such that the tension member (32) is between the first layer (36) and the second layer (38). Such a technique allows for eliminating the bridges typically used to support the tension members in molding devices. Eliminating such bridges eliminates the resulting grooves associated with previous arrangements. Providing a grooveless exterior on the jacket (34) of the load bearing member (30) eliminates a significant source of potential vibration and noise in an elevator system.

Claims10

Dependent claims

A method of making a load bearing member for use in an elevator system, comprising the steps of:

(A) heating at least one elongated steel cord tension member that is configured to support a load of an elevator car in an elevator system;
(B) placing the heated tension member adjacent one side of a first jacket layer that is against a substrate;
(C) at least partially melting the first jacket layer in the vicinity of the heated tension member such that the tension member at least partially penetrates the first jacket layer;
(D) subsequently adding a second jacket layer adjacent to at least the one side of the first jacket layer such that the elongated tension member is between the first and second jacket layers;
(E) wherein the second jacket layer is at least partially melted in the vicinity of the heated tension member such that the tension member at least partially penetrates the second jacket layer;
and
(F) securing the first and second jacket layers together such that the resulting load bearing member has a planar traction surface configured to contact a traction sheave in an elevator system.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/066,389Filed 13 Sep 2005
Published: US 2008/0226910 A118 Sep 2008
Granted: 8 Nov 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

B32B 37/153
With at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and…: at…
B32B 3/08
Characterised by features of form at particular places, e.g. in edge regions: characterised by added members at particular parts
B32B 3/30
Characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or…
B32B 7/022
Physical, chemical or physicochemical properties: mechanical properties