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:
Aug. 20, 1991
Filed:
Jul. 11, 1990
Applicant:
Inventor:
Martin Muller, Koblenz, DE;
Assignee:
Stabilus GmbH, Koblenz-Neuendorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21972164 ; 21912184 ; 267 6428 ;
Abstract
A gas spring must be filled with pressurized gas through an opening. This opening must be closed after the filling operation while maintaining the gas pressure within the gas spring. According to an illustrative example of the invention, the filling opening is bored by a laser beam, while the location of the opening to be bored is confined within a filling chamber. After such laser boring of the opening, pressurized gas is admitted to the filling chamber and flows from the filling chamber into the gas spring. Hereinafter, the opening is closed again by directing the laser beam against an annular zone surrounding the opening.