Patent US4065674A successfully refreshed from Google Patents.
US4065674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-anode X-ray tube
Assignee: US Philips Corp
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Filing: 1976-10-07
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Granted: 1977-12-27
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Expires: 1996-10-07
Abstract
Abstract The stator of the drive motor of a rotary anode X-ray tube is composed of a plurality of radially displaceable sector elements. As a result, the anode can be accelerated and decelerated while using a narrow airgap, and the airgap can be widened for bridging the high voltage to be applied at a later stage. The invention can be realized in automated form by using a blocking device for the high voltage and a tachometer.
Inventors
- 👤 Herman Gerard Lakerveld
- 👤 Johan Adriaan Rietdijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:52
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/30; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J2235/00; H01J2235/10; H01J2235/1026
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
An X-ray tube comprising a rotary anode and a drive motor which comprises a rotor which is rigidly connected to the anode and a stator which is arranged about the rotor, characterized in that the stator is composed of a plurality of radially movable sector elements.
Claim 2
Dependent Claim
46 words
An X-ray tube comprising a rotary anode and a drive motor which comprises a rotor which is rigidly connected to the anode and a stator which is arranged about the rotor, characterized in that the stator is composed of a plurality of radially movable sector elements.
Claim 3
Dependent Claim
29 words
An X-ray tube as claimed in claim 1, characterized in that the stator comprises three sector elements which, in the closed condition, bear against a housing accommodating the rotor.
Claim 4
Dependent Claim
31 words
An X-ray tube as claimed in claim 1, characterized in that it comprises a high voltage blocking circuit which is controlled by the position of the sector elements of the stator.
Claim 5
Dependent Claim
37 words
An X-ray tube as claimed in claim 1, characterized in that it comprises a tachometer and a switching circuit for automatically sliding the sector elements of the stator when a preset speed of the rotor is approached.
References Cited (Backward Citations)
US3963930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |