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. 08, 1998
Filed:
Jan. 21, 1997
Applicant:
Inventor:
Alfred Trzmiel, Grafenberg, DE;
Assignee:
Hydraulik-Ring Antriebs--und Steuerungstechnik GmbH, Nurtingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F16D / ;
U.S. Cl.
CPC ...
60477 ; 417416 ; 417470 ; 417570 ;
Abstract
An actuating device for a coupling of an automatic transmission of a vehicle includes a housing and at least one piston slide positioned in the housing for pumping a pressure medium to a coupling element. At least one piezo element is positioned in the housing and acts on the at least one piston slide for displacing the piston slide from a neutral position in a reciprocating displacement direction within the housing.