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. 21, 1985
Filed:
Nov. 01, 1983
Applicant:
Inventor:
Hermann Kruger, Wolfsburg, DE;
Assignee:
Volkswagenwerk Aktiengesellschaft, Wolfsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
1231 / ; 1231 / ; 1231 / ;
Abstract
In the specific embodiment described herein, a rotary valve for the gas exchange of an internal combustion engine has a rotary member and a housing and a series of circumferential dry-bearing gas-sealing rings and dry surface seals arranged to block leakage between adjacent passageways in the valve member and the housing.