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. 14, 2001
Filed:
Sep. 05, 2000
INA Walzlager Schaeffler oHG, , DE;
Abstract
A cam follower (,) designed to be switchable between different lifts for at least one gas-exchange valve and includes two adjacent sections (,) which can be coupled together via a coupling element (,). The coupling element (,) cooperates with a shutoff slide (,). It is a special feature of the shut-off slide (,) that it is produced as a mechanically closable and openable piston for an inlet (,) in a pressure chamber (,) in front of the coupling means (,), the piston, however, being maintainable hydraulically in its open position via high switching pressure. At the same time, the shutoff slide (,) is completely incorporated in the cam follower (,) and does not extend beyond it. As a result, undesired fluctuations in the pressure of the hydraulic fluid can no longer act on the coupling means (,) during the base circle of the cams acting on the cam follower (,) and an intended turned-off state. At the same time, displacement of these coupling means (,) in their coupling direction is only possible if a sufficiently high pressure of the hydraulic fluid is available for such movement. Otherwise, the shutoff means (,), via the force of a pressing means (,), will close the inlet (,) for hydraulic fluid.