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:
Aug. 28, 1990
Filed:
Jan. 31, 1990
Georg Schaeffler, Herzogenaurach, DE;
INA Walzlager Schaeffler KG, , DE;
Abstract
A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine and against one end face of which a control cam abuts and which on the other side bears against the end of a valve stem with its second end face, the valve tappet comprising a cup-shaped housing consisting of a hollow cylindrical wall closed at one end by a bottom against which the control cam abuts from outside and which is provided with a cylindrical guide sleeve concentric with the hollow cylindrical wall and extending at one end towards the bottom and at the other into the center of a disk member which with its outer periphery merges into the hollow cylindrical wall of the housing whereby between the hollow cylindrical wall and the cylindrical guide sleeve an annular oil reservoir supplied with oil through a bore leading to the out-side is defined, the actual hydraulic clearance compensation element being guided longitudinally displaceably in the guide sleeve and formed by an inner piston and an outer piston engaging over this.