Patent US4004174A successfully refreshed from Google Patents.
US4004174A
Expired / Lapsed
US
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Rotary anode structure for an X-ray tube
Assignee: Toshiba Corp
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Filing: 1974-11-01
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Granted: 1977-01-18
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Expires: 1994-11-01
Abstract
Abstract An X-ray tube includes a rotary anode structure having a rotary target. The target includes an electron receiving layer made of a tungsten based alloy and a substrate made of a molybdenum based alloy containing titanium and/or zirconium in an amount of 0.5 to 2.0% by weight.
Inventors
- 👤 Hideo Yashiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:35
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
A rotary anode structure for an X-ray tube comprising a rotary target including a substrate and an electron receiving layer, said substrate being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight a metal therefor selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy in which said alloy forming the substrate further includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 2
Dependent Claim
95 words
A rotary anode structure for an X-ray tube comprising a rotary target including a substrate and an electron receiving layer, said substrate being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight a metal therefor selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy in which said alloy forming the substrate further includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 3
Dependent Claim
37 words
A rotary anode structure according to claim 1 in which said electron receiving layer constituting alloy includes at least one element selected from the group consisting of Co, Ni, Al, Si, K, Re, Hf, Os and Ir.
Claim 4
Dependent Claim
113 words
A rotary anode structure for an X-ray tube comprising a rotary including a substrate and an electron receiving layer, said substrate being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight a metal therefor selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy, wherein said alloy forming the substrate further includes tungsten in a maximum W to Mo weight ratio of 1:9 and wherein said alloy forming the substrate also includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 5
Dependent Claim
113 words
A rotary anode structure for an X-ray tube comprising a rotary including a substrate and an electron receiving layer, said substrate being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight a metal therefor selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy, wherein said alloy forming the substrate further includes tungsten in a maximum W to Mo weight ratio of 1:9 and wherein said alloy forming the substrate also includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 6
Dependent Claim
37 words
A rotary anode structure according to claim 3 in which said electron receiving layer constituting alloy includes at least one element selected from the group consisting of Co, Ni, Al, Si, K, Re, Hf, Os and Ir.
Claim 7
Dependent Claim
97 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer and a rotary shaft connected to the target, said shaft being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy wherein said shaft constituting alloy includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 8
Dependent Claim
97 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer and a rotary shaft connected to the target, said shaft being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy wherein said shaft constituting alloy includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 9
Dependent Claim
74 words
A rotary anode structure according to claim 5 in which there is further included a member for connecting the rotary target to the shaft, said member being made of a Mo based alloy containing in an amount of 0.5 to 2.0% one selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy.
Claim 10
Dependent Claim
37 words
A rotary anode structure according to claim 5, in which said electron receiving layer constituting alloy includes at least one element selected from the group consisting of Co, Ni, Al, Si, K, Re, Hf, Os and Ir.
Claim 11
Dependent Claim
114 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer and a rotary shaft connected to the target, said shaft being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy wherein said shaft constituting alloy includes tungsten in a maximum W to Mo weight ratio of 1:9 wherein said shaft constituting alloy includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 12
Dependent Claim
114 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer and a rotary shaft connected to the target, said shaft being made of a Mo based alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy wherein said shaft constituting alloy includes tungsten in a maximum W to Mo weight ratio of 1:9 wherein said shaft constituting alloy includes silicon and potassium in an amount of 0.05 to 0.015% by weight.
Claim 13
Dependent Claim
36 words
A rotary anode structure according to claim 8 in which said electron receiving layer constituting alloy includes at least one element selected from the group consisting of Co, Ni, Si, K, Re, Hf, Os and Ir.
Claim 14
Dependent Claim
91 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer thereon, and a rotary shaft connected thereto, said shaft being made of a Mo base alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, and said target being made of the same material as said shaft, and said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy.
Claim 15
Dependent Claim
91 words
A rotary anode structure for an X-ray tube comprising a rotary target having an electron receiving layer thereon, and a rotary shaft connected thereto, said shaft being made of a Mo base alloy containing in an amount of 0.5 to 2.0% by weight of a metal selected from the group consisting of titanium, zirconium and a mixture thereof, and said target being made of the same material as said shaft, and said electron receiving layer being made of one selected from the group consisting of tungsten and a W based alloy.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |