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:
Mar. 25, 2014
Filed:
Jan. 26, 2009
Hans Hertz, Stocksund, SE;
Oscar Hemberg, Stockholm, SE;
Tomi Tuohimaa, Stockholm, SE;
Mikaél Otendal, Stockholm, SE;
Hans Hertz, Stocksund, SE;
Oscar Hemberg, Stockholm, SE;
Tomi Tuohimaa, Stockholm, SE;
Mikaél Otendal, Stockholm, SE;
Excillum AB, Kista, SE;
Abstract
A self-cleaning X-ray window arrangement is provided that includes a primary X-ray-transparent window element, separating an ambient pressure region from an intermediate region, and a secondary X-ray-transparent window element, separating the intermediate region from a reduced pressure region. A contaminant is expected to deposit on a side of the secondary element facing the reduced pressure region. A heat source is adapted to heat a portion of the secondary window element thereby evaporating contaminant. The secondary element shields the primary element from the reduced pressure region, in which contaminant is present, whereas the pressure-tight primary window element carries most of the differential pressure between the ambient pressure region and the reduced pressure region. Several features help to decrease the rate at which contaminant enters the intermediate region. By maintaining the pressure in the intermediate region close to the reduced pressure, the mechanical stress on the secondary window element can be limited as well as the exposure to harmful gases.