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:
May. 20, 2025
Filed:
Dec. 20, 2019
Empa Eidgenössische Materialprüfungs-und Forschungsanstalt, Dubendorf, CH;
Wolfgang Schneider Ingenieurburo, Thun, CH;
EMPA Eidgenössische Materialprüfungs-und Forschungsanstalt, Dubendorf, CH;
Wolfgang Schneider Ingenieurburo, Thun, CH;
Abstract
In order to provide a more reliable configuration for a hydraulic drive for accelerating and braking in particular a gas exchange valve () of internal combustion engines or other reciprocating engines, in particular if the occurring maximum travel of the moving mass can deviate considerably from an expected setpoint position, it is proposed that the drive piston () has at least one control edge () corresponding to an inflow opening (), which, when a defined travel hhas been attained, prevents the inflow of drive pressure pinto the drive chamber () and/or prevents the low-loss outflow of pressure medium from the brake chamber () to the basic pressure level (), wherein the remaining hydraulic drive force vanishes, becomes small or changes its sign when said travel his attained.