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:
Jul. 18, 2006
Filed:
Mar. 22, 2002
Franz Gratzer, Stallhofen, AT;
Robert Schaffernak, Weiz, AT;
Franz Gratzer, Stallhofen, AT;
Robert Schaffernak, Weiz, AT;
Magna Steyr Powertrain AG & Co. KG, Lannach, AT;
Abstract
A speed-difference-dependent hydraulic clutch comprises a drive housing (), which rotates in a housing (), a first shaft () which can be connected in a rotationally fixed manner to the drive housing, a second shaft () which is connected in a rotationally fixed manner to the drive housing, and furthermore a hydrostatic displacement machine (), a friction clutch () for connecting the first shaft () to the drive housing (), and a piston () for acting on the friction clutch (), the drive housing () having a pressure space () and where a pressure is produced in the pressure space () when a difference in speed occurs in the pressure space (), this pressure giving rise to action upon the friction clutch (), and a passage () leading from the pressure space to a control valve which opens up the route to a space of lower pressure in a controlled manner.