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:
Oct. 30, 2012
Filed:
Aug. 10, 2011
Dieter Laukemann, Crailsheim, DE;
Thomas Ohr, Crailsheim, DE;
Achim Neher, Crailsheim, DE;
Voith Patent GmbH, Heidenheim, DE;
Abstract
The invention relates to a hydrodynamic machine, in particular a retarder, having an external working medium circuit, comprising: a bladed primary wheel and a bladed secondary wheel which together form a toroidal working chamber which can be filled with working medium from the external working medium circuit, which is fed back into the external working medium circuit; an annular channel disposed outside the working chamber, which is connected in a working-medium conducting manner to the working chamber via outlet holes in the primary wheel or secondary wheel, and is in flow-conducting communication with the external working medium circuit in order to collect working medium leaving the working chamber through the outlet holes and supply this to the external working medium circuit. The invention is characterized by the following features: having at least one tapping opening disposed on or outside the working chamber which is in flow-conducting communication with the working chamber of the hydrodynamic machine and at least one filling channel which opens into a region of relatively low working medium pressure inside the hydrodynamic machine and which is in flow-conducting communication with the working chamber; wherein the at least one tapping opening and the filling channel are interconnected in a working-medium conducting manner by means of a return line outside the external working medium circuit in such a manner that working medium flows from the at least one tapping opening into the filling channel and from there back into the working chamber.