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:
Oct. 25, 1994
Filed:
Sep. 07, 1993
Applicant:
Inventors:
Norbert Hemmerlein, Pforzheim, DE;
Thomas Kannen, Wiernsheim, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ; F01L / ; F01L / ; F01L / ;
U.S. Cl.
CPC ...
123 9067 ; 12318813 ; 251337 ;
Abstract
A valve operating mechanism for internal-combustion engines has a valve and a pressure spring which is to move the valve into a closed end position and which is supported on a spring plate. For the reduction of the valve operating masses, at least the valve, the pressure spring and the spring plate are optimized with respect to their weight. The spring plate consists of a plastic material and has widenings of the cross-section for absorbing the occurring stresses.