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:
Sep. 17, 1991
Filed:
Sep. 06, 1989
Applicant:
Inventors:
Castor Fuhrmann, Brachtendorf, DE;
Herbert Freitag, Koblenz, DE;
Assignee:
Stabilus GmbH, Koblenz-Neuendorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F / ; B65D / ;
U.S. Cl.
CPC ...
18832217 ; 277 59 ;
Abstract
In a gas spring, the piston rod extends through one end of a container. Sealing rings are provided at this end of the container. These sealing rings are in sealing engagement with the piston rod and possibly also in sealing engagement with the inner surface of the container. Axially subsequent sealing rings are made of different caoutchouc materials. These different caoutchouc materials have different coefficients of permeation.