The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1999
Filed:
Nov. 06, 1997
Mark S Thompson, Tolland, CT (US);
Raymond Zatorski, East Hampton, CT (US);
James T Beals, West Hartford, CT (US);
Philip H McCluskey, Manchester, CT (US);
David W McKee, Somers, CT (US);
Michael C Lang, Naugatuck, CT (US);
Fred J Lussier, Hebron, CT (US);
Dat T Nguyen, West Hartford, CT (US);
Paul Bennett, Waterbury, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An elevator safety brake for stopping an elevator car is provided with a brake shoe having a fused sprayed friction coating for contacting an elevator guide rail surface to provide a stopping force. In a preferred embodiment, the coating is obtained by plasma spraying an admixture of 85 weight percent nickel-chromium alloy particles and 15 weight percent tungsten carbide particles on a substrate. The plasma sprayed admixture is fused. The fused sprayed friction surface of the brake exhibits a consistent high friction and low wear suitably accommodating high speed, high load elevators installed in very tall buildings.