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:
Jun. 04, 2002
Filed:
Aug. 11, 2000
Rolf Neuhaus, Lohr/Main, DE;
Bernd Urlaub, Steinfeld, DE;
Friedrich Zapf, Karlstadt, DE;
Liebhart Zaiser, Karlstadt, DE;
Hydraulik Ring GmbH, Limbach-Oberfrohna, DE;
Abstract
A hydraulic control valve has a solenoid with a coil having an interior. The solenoid also has a pole shoe inserted partially into the interior of the coil, wherein the interior of the coil defines an armature chamber and wherein the pole shoe delimits the armature chamber axially. The solenoid also has an armature arranged in the armature chamber and moveable in the armature chamber relative to the coil. The solenoid further has an armature plunger connected to the armature, wherein the pole shoe has a central bore and wherein the armature plunger is received in the central bore and penetrates the pole shoe. A hydraulic part with a valve housing formed as a mounting bushing and resting against the pole shoe is provided. The valve housing has an axial valve bore. The hydraulic part also has a low pressure area surrounding the valve housing, wherein the valve housing has at least one radial bore connecting the axial valve bore with the low pressure area. The hydraulic part has a valve slide slidably arranged in the valve bore and configured to be moved by the armature via the armature plunger. Between the pole shoe and the valve housing a fluid chamber is formed, wherein the fluid chamber has a fluid connection with the armature chamber and with the low pressure area. The fluid connection is located external to the at least one radial bore.