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. 01, 1998
Filed:
Jun. 29, 1995
Arnd Pfeifer, Willich, DE;
TRW Fahrwerksysteme GmbH & Co.KG, Dusseldorf, DE;
Abstract
The invention proposes a rapid, safe, and economic device for assembling a servo valve with an input shaft, an output shaft and a valve sleeve in a hydraulically centered position by: a) Forming a preassembled unit consisting of the output shaft and the input shaft; b) Clamping the valve sleeve into a rotatable position, however a position in which it is fixed in the axial direction; c) Inserting the preassembled unit into the valve sleeve, with said preassembled unit being axially movable, but positioned in a nonrotatable fashion such that the valve sleeve and the output shaft adjoin one another and can be turned relative to one another; d) Charging the preassembled servo valve with hydraulic pressure; e) Centering the servo valve by turning the valve sleeve; and f) Pressing the preassembled unit into the valve sleeve such that the output shaft and the valve sleeve are pressed together within the overlapping region.