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. 13, 2006
Filed:
Feb. 12, 2001
Christophe Simon, Paris, FR;
Hedi Sellami, Montrouge, FR;
Christophe Simon, Paris, FR;
Hedi Sellami, Montrouge, FR;
Armines, Paris Cedex, FR;
Abstract
The invention concerns a self-penetrating drilling method and a thrust-generating tool: the tool comprises N blades. Each blade comprised K drill cutters. The shapes, positions and orientations of said drill cutters are determined in the following manner: the kdrill cutter of the last blade drills, at the (q−1)of the tool rotational cycle, a cut in the rock downstream of the one produced by the (k+1)drill cutter of the first blade at the qrotational cycle of the tool; the kdrill cutter of the nth blade drills, at the qrotational cycle of the tool, a cut in the rock downstream of the one produced by the kdrill cutter of the (n+1)blade at the qrotational cycle of the tool; the normal to the leading edge of the drill cutter has a component along the axis of rotation oriented towards upstream.