Patent ID: 9401259
Filing Date: 2016-07-26
CPC Classification: G21G,H01J,H05G

Claim Text:
1. An X-ray generating tube, comprising: an insulating tube having a tube body extending along a longitudinal direction and a pair of ends; a cathode secured to one of the pair of ends and including an electron emitting source, the cathode having a peripheral portion joined to an end face of the one of the pair of ends; and an anode secured to the other of the pair of ends and including a target, the anode having a peripheral portion joined to an end face of the other of the pair of ends, wherein at least any one of the cathode and the anode includes a tubular extending portion extending along the longitudinal direction, wherein the tubular extending portion has a higher coefficient of thermal expansion than the insulating tube, wherein the tubular extending portion is secured to the insulating tube via a tubular joint portion, and wherein the insulating tube has a thinner tube wall region having a thinner tube wall than the tubular joint portion of the insulating tube, said thinner tube wall region being distant from the tubular joint portion along the longitudinal direction.