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. 20, 2015
Filed:
Nov. 02, 2012
Applicant:
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Inventor:
Josef Haupt, Tettnang, DE;
Assignee:
ZF Friedrichshafen AG, Friedrichshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B 13/04 (2006.01); F16K 11/076 (2006.01); F16K 11/07 (2006.01); F16H 61/02 (2006.01);
U.S. Cl.
CPC ...
F15B 13/0403 (2013.01); F16H 61/0276 (2013.01); F16K 11/0716 (2013.01); F16H 2061/0279 (2013.01); Y10T 137/87193 (2015.04);
Abstract
A valve device () of a hydraulic system () for actuating at least one shifting element () of a transmission. The valve device comprising a pilot-controlled control valve device () with a valve slide () and, functionally connected with this is, an also pilot-controlled switching valve device () which is also formed with a valve slide (). The valve slides () are arranged to move longitudinally in a common bore () of a valve housing () and are positioned coaxially with one another, and an inner valve slide () is arranged to move longitudinally at least partially within the outer valve slide ().