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. 15, 1986
Filed:
Feb. 21, 1985
Michel Dossier, Paris, FR;
Facom, Morangis, FR;
Abstract
This tool defines an inner opening (2) having a polygonal inscribed profile having six or twelve angles, said profile comprising grooves (3) at the place of said angles for the purpose of clearing the edges of the nut or bolt body to be driven, these grooves (3) being disposed between bearing surfaces (4) adapted to come into contact with the flat surfaces of said body so as to transmit the tightening or untightening torque. Said bearing surfaces (4) are convex in the direction toward the interior of the opening (2), the position of the contact edge of each bearing surface (4) being defined by a distance (x) to the mid-perpendicular (PM) of said flat surface, and the radius of curvature (R) at the contact of the profile of the bearing surface (4) being related to the value x by the relation: ##EQU1## in which: a is the dimension between the flat surfaces of the inscribed profile of the tool,