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:
Apr. 02, 2002
Filed:
Mar. 03, 2000
Martyn Richard Huw Knowles, Oxford, GB;
Andrew John Kearsley, Oxford, GB;
Anthony John Andrews, Oxford, GB;
Andrew Ian Bell, Oxford, GB;
Graham Rutterford, Oxford, GB;
Gideon John Foster-Turner, Oxford, GB;
Oxford Lasers Limited, Abingdon, GB;
Abstract
A method of laser-drilling a hole through a workpiece, such as an injector nozzle ( ), into a cavity comprising drilling a hole ( ) through the workpiece ( ) with a laser ( ), providing a fluid having laser-barrier properties in the cavity so that, when the hole ( ) is open to the cavity, laserlight passing through the hole ( ) is incident upon the fluid whereby the workpiece ( ) across the cavity from the hole ( ) is protected from the laserlight, and arranging that the fluid does not enter the laser-drillled hole ( ) during the drilling process. Apparatus for performing the method is also described.