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. 18, 1987
Filed:
Mar. 05, 1986
Walter Speil, Ingolstadt, DE;
Abstract
An hydraulic cup-shaped valve tappet for internal combustion engines with overhead camshaft comprising an outer hollow cylindrical housing (7) closed at one end by a bottom (3) in which is provided, concentrically radially spaced, a guide tube starting from the bottom, and in which is supported a longitudinally moveble plunger (5) of an hydraulic clearance compensation element, against the face thereof the end of a valve stem is abutting, a control cam (4) abutting against the bottom of the housing, characterized in that in the circular space between the cylindrical internal surface of the housing (7) and the external surface of the guide tube (8) a bellow element (16,21,25,31) is provided, said element being tightly connected, on the one hand, with the internal surface of the housing (7) and, on the other hand, with an end of the plunger (5) projecting from the guide tube which is capable to simultaneously take up variations in length and in volume and which together with the remaining tappet components define an oil-filled internal space completely closed outwardly.