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US 9,051,651 B2Granted
Elevator load bearing member having a conversion coating on tension member
AssigneeOtis Elevator Company
InventorsWilliam A. Veronesi, Mark R. Jaworowski, Hugh J. O'Donnell
Life of this patent
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Abstract
A load bearing member (22) useful in an elevator system (10) includes at least one elongated tension member (36), a conversion coating (46) on the elongated tension member (36), and a polymer jacket (34) at least partially surrounding the coated elongated tension member (36). In one example, the conversion coating (46) includes at least one of an oxide, a phosphate, or a chromate.
Claims27
A load bearing member for use in an elevator system comprising:
- at least one elongated steel tension member;
- and
- a conversion coating on the elongated steel tension member, the conversion coating including at least one of chromium phosphate, black iron oxide, or nickel phosphate.
A method of making a load bearing member for an elevator system comprising:
- coating an elongated steel tension member with a conversion coating, the conversion coating including at least one of chromium phosphate, black iron oxide, or nickel phosphate.
A load bearing member for use in an elevator system comprising:
- at least one elongated steel tension member;
- a conversion coating on the elongated steel tension member, the conversion coating including at least one of chromium phosphate, black iron oxide, or nickel phosphate;
- and
- a zinc coating between the at least one elongated steel tension member and the conversion coating.
1 more element
Dependencies are inferred from the claim text.