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. 20, 2001
Filed:
Oct. 19, 2000
Walter Speil, Ingolstadt, DE;
Ina Walzlager Schaeffler OHG, Herzogenaurach, DE;
Abstract
A valve drive (,) including of a hydraulic support element (,), a finger lever (,) supported on the support element (,), and a cam (,) of a camshaft (,), is provided with opening mechanisms (,) for the forcible opening of a check valve (,) of the support element (,) during contact of a base circle (&agr;) of the cam on the finger lever (,). The opening mechanisms (,) are formed from a slide extending in a support element, which acts on a closing body (,) of the check valve (,). In addition, they include a separate lever for the slide, where this lever communicates with a signal path on the camshaft (,). By these measures, eccentricity of the base circle (&agr;) or the like no longer lead during a play compensation phase of the support element (,) to an undesired hardening of a high pressure chamber (,) of the support element (,).