Patent US3711736A successfully refreshed from Google Patents.
US3711736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube having a rotary anode
Assignee: Compagnie Generale de Radiologie SA
•
Filing: 1971-03-04
•
Granted: 1973-01-16
•
Expires: 1991-03-04
Abstract
Abstract X-ray tube having a rotary anode comprising a thin outer wall made of a refractory metal preferably of high atomic number, such as tungsten. This wall forms a closed receptacle filled with a metal or an alloy in liquid state or melting at a relatively low temperature, such as sodium.
Inventors
- 👤 E Gabbay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:54
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105; H01J35/106
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
X-ray tube as claimed in claim 1, wherein said filling metal is sodium.
Claim 2
Dependent Claim
33 words
X-ray tube as claimed in claim 1, wherein said refractory metal or alloy is a metal or an alloy of metals having a high atomic number which are X-ray emissive under electron bombardment.
Claim 3
Dependent Claim
13 words
X-ray tube as claimed in claim 3, wherein said refractory metal is tungsten.
Claim 4
Dependent Claim
50 words
X-ray tube as claimed in claim 1, said hollow body being made of a refractory metal or an alloy of such metals which do not emit X-rays having a desired spectrum, wherein at least said focal track is covered by a layor of an X-ray emissive refractory metal or alloy.
Claim 5
Dependent Claim
63 words
X-ray tube as claimed in claim 1, wherein the part of the outer wall opposite said focal track contains concentric annular undulations, like a pressure bellows, enabling it to be deformed under the influence of the difference between the coefficients of expansion of the metal forming the hollow body and the liquid metal filling same, without deforming the rest of the anode body.
Claim 6
Dependent Claim
47 words
X-ray tube as claimed in claim 1, wherein said anode is manufactured from pre-shaped sheet metal blanks, the space between the blanks being filled with a liquid metal and the sealing of the walls being effected after filling by welding them together by means of electron bombardment.
References Cited (Backward Citations)
US2468942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |