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. 07, 2014
Filed:
Mar. 24, 2009
Matthias Reisch, Ravensburg, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Mark Mohr, Tettnang, DE;
Manuel Götz, Ravensburg, DE;
Matthias Reisch, Ravensburg, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Mark Mohr, Tettnang, DE;
Manuel Götz, Ravensburg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
The invention relates to a positively engaging shifting element which can be hydraulically or pneumatically actuated, comprising a hydraulically or pneumatically actuatable piston (I) having a piston compartment () containing a hydraulic medium or pressure medium, a jaw () having a dog-type gearing () and a mating jaw () with which the dog-type gearing () meshes when engaged. The engaging speed of the jaw () can be increased by decoupling the jaw () from the hydraulic or pneumatic volume flow when the jaws () and () are in a tooth butt position in relation to each other and by pretensioning the jaw () by means of a mechanical device () that is actively connected to the piston (I). The gap between the jaws, i.e. the window into which the jaw () can be engaged is maintained as narrow as possible in order for a tooth butt position of the jaws () and () in relation to each other being highly probable when the shift element is applied.