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:
Feb. 12, 1991
Filed:
Jan. 12, 1990
Jean-Claude Detilleux, Les Ulis, FR;
Gilbert Ferre, Bondy, FR;
Philippe LeFort, Brunoy, FR;
Andre Ponsada, Rueil Malmaison, FR;
Jean-Pierre Schreiber, Mareil-sur-Mauldre, FR;
Jean-Bernard Wittner, Clamart, FR;
Soletanche, Nanterre, FR;
Abstract
The invention relates to a device for affixing cutter drums on an apparatus designed to cut trenches in the ground. The driver includes a revolving plate 4 disposed perpendicular to its axis and to the end of the latter, the plate having on its periphery a convex polygonal shape 9. A cutter drum 8 is provided with a portion 8a including a central hollow of concave polygonal shape 10 corresponding to the convex polygonal shape 9 of the plate 4 and of slightly greater dimensions. Bolts 11 unite the cutter drum 8 to the said plate 4 such that the rotational driving of the cutter drum 8 by the plate is performed through the medium of the aforesaid polygonal surfaces 9, 10 which come into engagement with one another.