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:
Aug. 25, 1998
Filed:
Apr. 29, 1997
Uwe Blancke, Koblenz, DE;
Karl-Hermann Motz, Nortershausen, DE;
Bomag GmbH, Boppard, DE;
Abstract
Dynamic soil packing can be achieved by a procedure and device whereby the vibratory motion of the roller or one of the parts attached to it is determined, and whereby the vertical component of the vibratory force is diminished in the event of a disturbance (e.g., bouncing) of the basic roller vibration. The packing device is one having at least two exciter shafts synchronously rotating in opposite directions and arranged parallel to or in alignment with the roller axis for generating a vibrating motion, the exciter shafts being adjustable in their position and/or phase relationship so that the resulting centrifugal force electively exerts horizontal shearing forces and/or vertical compressive forces in the soil. A motion sensor determines the vibratory motion, such as amplitude, acceleration or periodicity thereof, and in connection with a control loop and adjustable pivot bearing adjusts the horizontal and vertical components of the motion to eliminate the disturbance.