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. 01, 2011
Filed:
Jul. 16, 2007
Applicant:
Lorenzo Cosi, Florence, IT;
Inventor:
Lorenzo Cosi, Florence, IT;
Assignee:
Nuovo Pignone Holdings, S.p.A., Florence, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 5/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
A blade is mountable to a disc. The blade comprises a blade platform and a blade root extending from the blade platform. The blade root comprises a first hook and a second hook, a first neck between the first hook and the blade platform, and a second neck between the first hook and the second hook. Each hook comprises a contact surface and a non-contact surface. An angle between each contact surface and each non-contact surface is optimized to reduce local stresses.