Filament for X-ray tube and X-ray tube having the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 18, 2007
Grant Date -
Apr 26, 2007
app pub date -
Oct 19, 2006
filing date -
Oct 21, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filament for an X-ray tube has a varied wire diameter but has a constant coil outside diameter to obtain a good uniformity of the longitudinal temperature distribution of the filament. The filament has a wire diameter d which is gradually reduced from the longitudinal central region to the longitudinal ends while the coil outside diameter D is fixed along the longitudinal direction. The wire is polished at only the inside of the coil to reduce the wire diameter. In order to make the longitudinal temperature distribution uniform as far as possible, the difference .DELTA.d between the wire diameter d.sub.max at the longitudinal central region and the wire diameter d.sub.min at the longitudinal ends should satisfy the following limitation: .DELTA.d/d.sub.max=0.041 to 0.145.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully