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:
Nov. 10, 2020
Filed:
Jun. 02, 2015
Siemens Aktiengesellschaft, Munich, DE;
John J. Marra, Winter Springs, FL (US);
SIEMENS AKTIENGESELLSCHAFT, Munich, DE;
Abstract
An attachment system () for a turbine airfoil () including one or more roots () to attach the turbine airfoil () to a rotor, whereby the roots () have one or more curved teeth () that substantially limit, if not completely eliminate, circumferential rocking motion of the turbine airfoil () relative to a disc () supporting the turbine airfoil () during turning gear operation. The curved configuration of the teeth () extending laterally from the root () prevent rotation of the turbine airfoil () relative to the disc () supporting the turbine airfoil (), thereby preventing premature failure of the turbine airfoil () or disc () due to wear from turbine airfoil () rocking during turning gear operation. In at least one embodiment, a laterally extending outer edge () of an axially extending tooth () may be curved about an axis () orthogonal to a centerline () of a turbine engine () in which the turbine airfoil () is positioned.