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. 28, 1999
Filed:
May. 02, 1997
Dieter Tischer, Wendlingen, DE;
Roland Meyer, Roth, DE;
Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH, Nurtingen, DE;
Abstract
An actuator for a gear shifting mechanism of a motor vehicle has a housing with pressure chambers and one connector opening into each pressure chamber for supplying a pressure medium into the pressure chambers. A control member is positioned in the housing so as to be axially displaceable in the housing by the pressure medium into different switching positions. A first and second auxiliary piston are supported on the control member and displaceable relative to the control member by the pressure medium. The first auxiliary piston has a first end facing away from the second auxiliary piston, the first end of the first auxiliary piston having a first abutment. The second auxiliary piston has a first end facing away from the first auxiliary piston, the first end of the second auxiliary piston having a first abutment. The first auxiliary piston delimits at least partially the first pressure chamber and the second auxiliary piston delimits at least partially the second pressure chamber. The housing has at least one counter abutment for each auxiliary piston. The first auxiliary piston has at least one second abutment. The second auxiliary piston has at least one second abutment. The control member has at least one counter abutment, wherein the at least one second abutment of the first and second auxiliary pistons are located in a path of movement of the at least one counter abutment of the control member.