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:
Sep. 27, 1988
Filed:
Dec. 19, 1986
Applicant:
Inventors:
Berthold Herrmann, Gerstetten, DE;
Klaus Brosius, Heidenheim, DE;
Olaf Spitzer, Giengen, DE;
Rudolf Fetzer, Crailsheim, DE;
Assignee:
J. M. Voith GmbH, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
188296 ; 188269 ; 188274 ;
Abstract
For the reduction of capacity losses and heating in hydrodynamic working circuits, especially retarders, caused by undesired air circulation in emptied condition, it is suggested to introduce a certain quantity of a blocking medium into the working chamber. This blocking medium may be operating fluid, air, or a mixture of both, and can be introduced radially from the inside, from the outside, or from the center. It forms a blocking film by rotation of the bladed rotor wheel, which substantially prevents the circulation of air from one bladed wheel to the other.