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. 23, 1990
Filed:
Jul. 14, 1989
Applicant:
Inventor:
Georg Wahl, Crailsheim, DE;
Assignee:
Voith Turbo GmbH & Co. KG, Crailsheim, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
475 34 ; 475 50 ; 475 69 ; 475 71 ;
Abstract
In a power-transmission unit for variable-speed drive of machinery with hydro-dynamic speed-superposition of a differential gear a second torque converter is provided as a braking device. This increases the effectiveness of the unit by feedback of the superposed output onto the drive side. Particularly advantageous is the use of an oppposed-motion converter as brake converter for certain operating conditions or the combination of a with-motion converter and an opposed-motion converter in the unit. Furthermore, this makes an extension of the speed control range possible.