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:
May. 14, 2002
Filed:
Jul. 13, 2000
Romolo Bitelli, S. Lazzaro, IT;
Bitelli SpA, Minerbio, IT;
Abstract
A vibrating drum for soil tamping machines, including a cylindrical tubular skirt adapted to be arranged in abutment against soil to be tamped to which is associated a first hydraulic motor which rotates the tubular skirt around a central shaft to move the tubular skirt forward, and a vibration mechanism to make the tubular skirt vibrate. The vibration mechanism includes a second hydraulic motor coupled to an end of the central shaft and a receptacle fastened to the central shaft which delimits a chamber for containing a liquid in which is partly immersed a draught pipe connected to a hydraulic circuit, which includes a pumping mechanism adapted to change an amount of liquid contained in the chamber so as to change the vibration amplitude of the drum.