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:
Jun. 03, 2003
Filed:
Apr. 18, 2001
Woong-chul Yang, Ann Arbor, MI (US);
Mohammad Haghgooie, Ann Arbor, MI (US);
James Thomas Kovach, Livonia, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
An electromagnetic actuator for opening and closing a cylinder valve . The actuator includes an opening coil , a closing coil , a magnetic armature which is disposed between coils and which is fixedly attached to the stem or shaft portion of valve a pair of conventional valve springs and a pair of pneumatic dampers or air cushioning assemblies . Pneumatic dampers are effective to selectively decelerate the moving components of the actuator as they approach their respective seats during valve opening and valve closing events, thereby substantially reducing noise and vibration harshness (“NVH”).