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:
Jun. 02, 2015
Filed:
Jun. 27, 2012
Laurent Bianchi, Marseilles, FR;
Jacques Gaffiero, Paris, FR;
Alain Charreyre, Mortefontaine, FR;
Francois Marchand, Villeparisis, FR;
Laurent Bianchi, Marseilles, FR;
Jacques Gaffiero, Paris, FR;
Alain Charreyre, Mortefontaine, FR;
Francois Marchand, Villeparisis, FR;
Airbus Helicopters, Marignane Cedex, FR;
Abstract
A rotor blade () provided with an outer covering () and with at least one load take-up spar () associated with at least one pin-receiving bushing (). Each spar () is a compartmentalized spar comprising centrifugal force take-up means () incorporated within a twisting stress take-up casing (), said centrifugal force take-up means () comprising at least two boxes (), each having said pin-receiving bushing () of the spar () passing therethrough, each box () including a closed retention belt () extending in the spanwise direction of the blade, the retention belt () of one box () surrounding the retention belt () of another box (), each retention belt () being provided with unidirectional fibers () wound around said pin-receiving bushing (), said casing () being provided with inclined fibers () presenting an angle relative to said unidirectional fibers ().