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. 16, 1996
Filed:
Apr. 25, 1994
Yves Bouchon, Nancy, FR;
Herve Dinville, Saint-Parres-aux-Tertres, FR;
Societe dite JBS Societe Anonyme, Troyes, FR;
Abstract
A thumb prosthesis includes a trapezial component adapted to be fixed in the trapezium and a metacarpal component adapted to be fixed in the metacarpal bone. The trapezial component has a self-cutting thread adapted to be screwed into the trapezium; a polygonal base, having a conical surface and a neck part and being situated at one end of the self-cutting thread; and a spherical head disposed on the conical surface and extending from the neck part. The metacarpal component has a frustoconical head having a large-diameter end and an opposite, small-diameter end and a geometrical axis; a hemispherical socket provided in the small-diameter end and receiving a surface portion of the spherical head; and a stem extending from the large-diameter end of the frustoconical head. The stem is offset relative to the geometrical axis and has a decreasing triangular cross section with rounded corners as viewed in a direction away from the frustoconical head.