Elevator belt assembly with noise and vibration reducing grooveless jacket arrangement
AssigneeOtis Elevator Company
InventorsPedro S. Baranda, Richard L. Hollowell, John T. Pitts, Hugh J. O'Donnell
Life of this patent
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Abstract
An elevator load bearing assembly includes a plurality of cords within a jacket. The cords are spaced from an exterior surface on the jacket such that the spacing remains generally constant along the length of the belt. The jacket has a smooth, uninterrupted exterior surface for contacting sheaves as the belt moves in the elevator system. A method of making the inventive belt assembly is disclosed. The inventive belt assembly minimizes the possibility for generating an annoying, audible sound and vibration during elevator operation.
Claims35
A method of making an elevator belt assembly having a plurality of cords within a jacket, comprising the steps of:
- (a) aligning the plurality of cords in a selected arrangement;
- (b) applying a selected jacket material to the cords to encase the cords in the jacket with a generally smooth, uninterrupted surface on an exterior of the jacket that is adapted to contact sheaves in an elevator system;
- and
- (c) maintaining a selected tension on each of the cords on an individual cord basis while applying the jacket such that the tension on the cords controls positions of the cords within the jacket and the cords are uniformly spaced from the generally smooth, uninterrupted surface on the jacket along the length of the belt assembly.
An elevator belt assembly made by the process, comprising the steps of:
- (a) aligning a plurality of cords in a selected arrangement;
- (b) applying a waxless urethane jacket material to the cords using a molding device and cooling at least one of the jacket material or the molding device as the applied jacket and the cords exit the molding device to encase the cords in the jacket with a smooth, uninterrupted surface on an exterior of the jacket that is adapted to contact sheaves in an elevator system;
- and
- (c) maintaining a selected tension on the cords, respectively, while applying the jacket such that the tension on the cords controls positions of the cords within the jacket and the cords are uniformly spaced from the smooth, uninterrupted surface on the jacket along the length of the belt assembly.
An elevator belt assembly made by the process, comprising the steps of:
- (a) aligning a plurality of cords in a selected arrangement;
- (b) applying a selected jacket material to the cords to encase the cords in the jacket with a smooth, uninterrupted surface on an exterior of the jacket that is adapted to contact sheaves in an elevator system;
- and
- (c) maintaining a selected tension on each of the cords on an individual cord basis while applying the jacket such that the tension on the cords controls positions of the cords within the jacket and the cords are uniformly spaced from the smooth, uninterrupted surface on the jacket along the length of the belt assembly.
A method of making an elevator belt assembly having a plurality of cords within a jacket, comprising the steps of:
- (a) aligning the plurality of cords in a selected arrangement;
- (b) applying a waxless urethane jacket material to the cords to encase the cords in the jacket with a generally smooth, uninterrupted surface on an exterior of the jacket that is adapted to contact sheaves in an elevator system;
- and
- (c) maintaining a selected tension on the cords, respectively, while applying the jacket such that the tension on the cords controls positions of the cords within the jacket and the cords are uniformly spaced from the generally smooth, uninterrupted surface on the jacket along the length of the belt assembly.
A method of making an elevator belt assembly having a plurality of cords within a jacket, comprising the steps of:
- (a) aligning the plurality of cords in a selected arrangement;
- (b) applying a selected urethane jacket material to the cords to encase the cords in the jacket with a generally smooth, uninterrupted surface on an exterior of the jacket that is adapted to contact sheaves in an elevator system;
- (c) maintaining a selected tension on the cords, respectively, while applying the jacket such that the tension on the cords controls positions of the cords within the jacket and the cords are uniformly spaced from the generally smooth, uninterrupted surface on the jacket along the length of the belt assembly;
- and
- (d) using a molding device that has an opening through which the belt assembly proceeds, the opening comprising a non-linear configuration such that a thickness of the jacket exiting the opening varies across the width of the jacket.
Dependencies are inferred from the claim text.