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:
Apr. 05, 2016
Filed:
May. 01, 2014
Airbus Helicopters, Marignane, FR;
Bernard Certain, Aix en Provence, FR;
AIRBUS HELICOPTERS, Marignane, FR;
Abstract
A rotorcraft ducted rotor comprising a rotary assembly arranged in a passage to rotate about an axis of symmetry (AX). The rotary assembly () has a plurality of blades (), each fastened to a hub (), each blade () complies with a twisting relationship defining an angle of twist lying in the range zero degrees inclusive todegrees inclusive. Spanwise, each blade () comprises a first zone () followed by a second zone (), which second zone presents rearward sweep, being provided with a second trailing edge () situated downstream from a first trailing edge () of the first zone (). Each first zone () includes a root () connected to the hub () by a fastener device () having a rolling bearing () without clearance and a conical laminated abutment ().