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, 2007
Filed:
Dec. 07, 2000
Applicant:
Franz Gratzer, Stallhofen, AT;
Inventor:
Franz Gratzer, Stallhofen, AT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 43/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power transmission unit with a hydraulic coupling dependent on a rotational-speed difference, in which, when a rotationalspeed difference occurs between the input member () and the output member (), a hydrostatic displacement machine () produces in a pressure space () a pressure that acts on a piston () acting on a friction clutch (), has a housing (). To compensate for the centrifugal force acting on the working fluid in the pressure space (), at least one centrifugalforce element () is provided in the housing, exerting on the piston () a force counter to the pressure produced by the centrifugal force in the pressure chamber ().