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:
Aug. 22, 2017
Filed:
May. 02, 2014
Spinevision, Antony, FR;
Julien Bazille, Massy, FR;
SPINEVISION, Antony, FR;
Abstract
A polyaxial bone anchoring system comprises a bone anchoring member provided with a hemispherical head and a tubular barrel comprising a base traversed by an axial channel of which the cross-section is greater than the cross-section of the hemispherical head, the channel having, in the lower part, a frustoconical housing that widens in the direction opposite the hemispherical head and, upstream from the frustoconical housing, a transverse shoulder of which the inner cross-section is substantially equal to the cross-section of the hemispherical head, the system further comprising a conical split ring of which the outer surface matches the inner surface of the frustoconical housing and of which the minimum cross-section when idle is smaller than the nominal cross-section of the hemispherical head, said ring being made from a deformable material.