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US 6,742,769 B2Granted
Elevator sheave for use with flat ropes
AssigneeOtis Elevator Company
InventorsPedro S. Baranda, John T. Pitts, Richard L. Hollowell, John P. Wesson, Douglas E. Logan, Zlatko Strbuncelj, James Hubbard
Life of this patent
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Abstract
In an elevator sheave for a flat belt, hard, thin surface plating can be applied to enhance durability while maintaining traction.
Claims5
A traction sheave for engaging an elevator rope, the traction sheave comprising:
- a traction surface for engaging and driving the elevator rope;
- and
- a chrome plating applied to the traction surface and having a thickness of less than 10 microns.
Dependencies are inferred from the claim text.