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. 09, 1990
Filed:
Sep. 08, 1988
Michel Bost, Joinville le Pont, FR;
Alain Chasson, Villeneuve La Garenne, FR;
Aerospatiale Societe Nationale Industrielle, Paris Cedex, FR;
Abstract
A fastening device including sleeves (2, 6) for absorbing forces, and a rotor blade (10) equipped with such a device for fastening to a hub (23). The device comprises an inner metallic sleeve (2) having a cylindrical central bore (4) and having a frusto-conical outer lateral face which is pressed coaxially and is affixed in the frusto-conical inner bore of an outer sleeve (6) provided with a slot (9) along one of its generatrices, and fitted into a recess delimited in the blade root (10) by a loop (12a) formed of bands (21) of rovings of the spar of the blade. The fitting of the two sleeves into one another involves a deformation by radial expansion of the outer sleeve (6), which adapts itself to the diameter of the recess provided in the composite materials of the blade root. The invention applies to helicopter rotor blades.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile