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:
Dec. 15, 1992
Filed:
Jul. 25, 1991
Imre Szodfridt, Stuttgart, DE;
Dr. Ing. h.c.F. Porsche AG, Weissach, DE;
Abstract
An arrangement for changing the relative rotating position of shafts in an internal-combustion engine has a camshaft, which can be rotated with respect to a shaft driving it, that has a phase converter with a piston which is acted upon hydraulically on both sides. The sprocket wheel driving the camshaft has an external toothing. A toothing, which is connected with the camshaft via a hollow shaft, is constructed as an internal toothing. Corresponding toothings of the piston engage in both toothings. In the camshaft, an axial recess is arranged in which an inserted pipe separates two spaces from one another. An on/off valve fed from the oil circulating system, in one position, via one of the spaces, supplies the piston with oil pressure so that it is axially shifted into a first end position and, in the process, turns the camshaft. In a second position, the piston is axially pushed back by the second space with oil pressure.