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:
Apr. 28, 2015
Filed:
Mar. 17, 2010
Peter Busley, Linz/Rhein, DE;
Burkhard Frank, Vetterschoss, DE;
Cyrus Barimani, Konigswinter, DE;
Günter Hähn, Konigswinter, DE;
Peter Busley, Linz/Rhein, DE;
Burkhard Frank, Vetterschoss, DE;
Cyrus Barimani, Konigswinter, DE;
Günter Hähn, Konigswinter, DE;
Wirtgen GmbH, , DE;
Abstract
In a road construction machine, in particular a road milling machine (), with a machine frame (), and a chassis () with preferably several crawler track units (), said chassis () carrying the machine frame (), where the crawler track units () comprise a chain () which continuously revolves around at least one guide wheel () and at least one drive wheel (), as well as several track rollers () which roll on the chain () and carry the machine frame (), where the drive wheel () or preferably the guide wheel () is provided with an adjustment device (), which enables the reciprocal spacing of the axles () of the drive wheel and guide wheel () to be adjusted for adaptation to a current lengthening of the chain (), and where in addition to the adjustment device (), a spring element () is provided which allows, using the adjusted spacing as a basis, a shortening of the spacing between the axles () of the drive wheel and guide wheel () against the spring force in the event of an operation-related increase of the chain tension to prevent any tension peaks in the chain (), it is provided that the adjustment device () comprises a piston-cylinder unit () with a piston () to which a preferably hydraulic operating pressure can be applied in order to generate a predetermined force of the piston (), and that, upon reaching the predetermined chain tension, a locking device () locks the end position of the piston () of the piston-cylinder unit () reached under the operating pressure applied.