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:
Nov. 12, 2019
Filed:
Jun. 20, 2016
Schaeffler Technologies Ag & Co. KG, Herzogenaurach, DE;
Stefan Kramer, Langenzenn, DE;
David Köhler, Egloffstein, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
Control valves for a hydraulic camshaft adjuster are disclosed. In one example, the control valve includes a housing and a control piston mounted in a receiver of the housing. Several openings may be provided on an inner casing surface of the receiver, at least some of which may be assigned to an inlet port P, a supply port A, a supply port B or a supply port C. The control piston may include a first control groove, a second control groove and a third control groove which can each be connected to at least two openings of the housing depending on a position of the control piston relative to the housing. The first control groove may be configured to be brought into fluid-conductive connection with a first inlet opening assigned to the inlet port P and with an opening assigned to the supply port A. The second control groove may be configured to be brought into fluid-conductive connection with an opening assigned to the supply port A and/or with an opening assigned to the supply port B and/or with an opening assigned to the supply port C. The third control groove may be configured to be brought into fluid-conductive connection with the first inlet opening or a second inlet opening assigned to the inlet port P and with an opening assigned to the supply port B.