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:
Jan. 26, 1988
Filed:
Nov. 14, 1986
Dieter Goppelt, Aurachtal, DE;
Dieter Schmidt, Nuremberg, DE;
INA Walzlager Schaeffler KG, , DE;
Abstract
A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an ice being located between a cam of a cam shaft and an end of a valve stem, the tappet comprising a cup shaped housing (1) closed at one end by an end member (3) against the outside of which the cam abuts and a cylindrical guide sleeve (6) concentric with a cylindrical wall (2) and arranged at its end away from member (3) in the center of an annular flange element (5) which at its outer circumference merges into the cylindrical wall (2) of the housing (1) and guide sleeve (6) is spaced at an opposite end from end member (3), a self-adjusting hydraulic play compensating element (10) being guided for longitudinal movement in the guide sleeve (6) comprising an inner piston (12) and an outer piston (11), the two pistons telescoping and defining oil pressure chamber (22) which communicates through a bore in the inner piston (12) closed by a check valve (21) with a central oil reservoir (13) disposed in inner piston (12), the outer piston (11) being mounted in the guide sleeve (6) and abutting at its closed end against the end of the valve stem, an annular oil reservoir (20) which is supplied with oil from the outside through a bore. A sleeve (17) beginning from end member (3) is sealed at its bottom end against oil reservoir (20) and slidingly engages the outer surface of guide sleeve (6) and extends close to flange element (5) having longitudinal channel (19) is formed between sleeve (17) and guide sleeve (6) to permit oil transfer.