EP 4177927 A1 20230510 - X-RAY TUBE
Title (en)
X-RAY TUBE
Title (de)
RÖNTGENRÖHRE
Title (fr)
TUBE À RAYONS X
Publication
Application
Priority
EP 21207192 A 20211109
Abstract (en)
The present invention relates to an X-ray tube (10) comprising a cathode (20), the cathode comprising:- an electron emitter filament (30);- a first pair of grids (40); and- a second pair of grids (50).The first pair of girds are located at opposite sides of the electron emitter filament. The second pair of girds are located at opposite sides of the electron emitter filament closer to the electron emitter filament than the first pair of grids. The cathode is configured such that a voltage or an average voltage of the first pair of grids is different to a voltage of the second pair of grids.
IPC 8 full level
H01J 35/06 (2006.01); H01J 35/14 (2006.01); H05G 1/58 (2006.01)
CPC (source: EP)
H01J 35/066 (2019.04); H01J 35/147 (2019.04); H01J 35/153 (2019.04); H05G 1/58 (2013.01)
Citation (search report)
- [XI] US 5031200 A 19910709 - PLESSIS ANDRE [FR], et al
- [XI] US 6438207 B1 20020820 - CHIDESTER CHARLES LYNN [US], et al
- [XI] US 5125019 A 19920623 - EVAIN BERNARD [FR], et al
- [XI] US 2011051884 A1 20110303 - HASHIMOTO SUSUMU [JP], et al
- [XI] DE 102012211285 B3 20131010 - SIEMENS AG [DE]
- [XI] DE 102012211287 B3 20131010 - SIEMENS AG [DE]
- [XI] US 2007274457 A1 20071129 - DUNHAM BRUCE MATTHEW [US], et al
- [XI] WO 2020229254 A1 20201119 - KONINKLIJKE PHILIPS NV [NL]
- [I] US 2020000423 A1 20200102 - MOHAMMADI ZAHRA [DE]
- [I] US 2020343069 A1 20201029 - ZHU GUOPING [CN], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 21207192 A 20211109; EP 2022078335 W 20221012