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. 14, 2012
Filed:
Sep. 12, 2006
Peter Busley, Linz/Rhein, DE;
Günter Tewes, Unkel/Rhein, DE;
Peter Busley, Linz/Rhein, DE;
Günter Tewes, Unkel/Rhein, DE;
Wirtgen GmbH, , DE;
Abstract
A road construction machine includes a machine frame, a working drum and a plurality of ground engaging supports. A plurality of lifting columns are connected between the machine frame and the ground engaging supports. Each of the lifting columns include two telescoping hollow cylinders. A plurality of lifting position measuring devices are provided, each measuring device being coupled with elements of one of the lifting columns, which elements are capable of being displaced relative to one another in accordance with the lifting position of the lifting column in such a manner that a path signal pertaining to a lifting position of the lifting column is continuously detectable by the measuring device. A controller is operably connected to the lifting position measuring devices to receive the path signals and to regulate the lifting positions of the lifting columns in response to the path signals.