Patent US3720853A successfully refreshed from Google Patents.
US3720853A
Expired / Lapsed
US
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Bearing structure for x-ray tube with rotating anode
Assignee: Philips Nuclear Medicine Inc
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Filing: 1971-03-02
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Granted: 1973-03-13
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Expires: 1991-03-02
Abstract
Abstract An X-ray tube having a rotating anode supported by a refractory carbide ball bearing structure.
Inventors
- 👤 Z Atlee
- 👤 R Kasten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:06
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/32; F16C33/66; H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/1024; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49689; Y10T29/49709
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
An X-ray tube comprising: an envelope, a cathode and an anode in said envelope, means supporting said anode for rotation within said envelope including ball bearings and opposing races, said ball bearing being formed of a refractory metal carbide, said races being formed of steel.
Claim 2
Dependent Claim
45 words
An X-ray tube comprising: an envelope, a cathode and an anode in said envelope, means supporting said anode for rotation within said envelope including ball bearings and opposing races, said ball bearing being formed of a refractory metal carbide, said races being formed of steel.
Claim 3
Dependent Claim
16 words
An X-ray tube according to claim 1 wherein said ball bearings are formed of tungsten carbide.
Claim 4
Dependent Claim
19 words
An X-ray tube according to claim 1 wherein said ball bearings and races are lubricated with lead or gold.
References Cited (Backward Citations)
US2609256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |