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:
Dec. 07, 2021
Filed:
Dec. 11, 2020
Wirtgen Gmbh, Windhagen, DE;
Abstract
In a self-propelled construction machine (), in particular road milling machine, comprising a machine frame (), at least three travelling devices (), wherein at least one of the three travelling devices () is realized as a pivotable travelling device () so that said travelling device () is pivotable about at least one vertical pivoting axis in relation to the machine frame () between a first pivoted-in and at least one second pivoted-out position, at least one working device (), in particular a milling drum, for working the ground pavement (), at least one hydraulic drive system () for driving at least two travelling devices (), wherein at least one of the at least two driven travelling devices is the pivotable travelling device (), wherein the hydraulic drive system () comprises at least one hydraulic pump (), it is provided for the following features to be achieved: the hydraulic drive system () comprises one each hydraulic variable displacement motor () for driving the driven travelling devices () with the exception of the at least one pivotable travelling device (), wherein the hydraulic drive system () comprises a hydraulic fixed displacement motor () for driving the at least one pivotable travelling device ().