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:
Sep. 20, 2011
Filed:
Apr. 04, 2007
Philippe Chagnot, Nanterre, FR;
Fabrice Mathieu, Nanterre, FR;
Daniel Perpezat, Nanterre, FR;
Jean-claude Riglet, Nanterre, FR;
Philippe Chagnot, Nanterre, FR;
Fabrice Mathieu, Nanterre, FR;
Daniel Perpezat, Nanterre, FR;
Jean-Claude Riglet, Nanterre, FR;
Compagnie du Sol, Nanterre, FR;
Abstract
The invention relates to a drilling tool comprising: two pairs of rotary drums in axial alignment on parallel axes; a motor mechanism for driving rotation of the drums; a support element; and a support structure on which the drums are mounted to rotate and serving to connect the drums to the support element; the tool being characterized in that the motor mechanism is mounted inside the drums and in that the support structure comprises a plate forming bearings at its bottom ends for the drums; and a mounting pad for fastening to the support element.