Patent US3619696A successfully refreshed from Google Patents.
US3619696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An electric drive motor for rotatably driving the anode of an x-ray tube
Assignee: TORR LAB Inc
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Filing: 1969-11-17
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Granted: 1971-11-09
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Expires: 1989-11-17
Abstract
Abstract A high-voltage, high-vacuum X-ray tube is provided which includes a rotating target electrode for increased target life, and which also includes a unique and improved electric motor for rotatably driving the target electrode, the motor having a flat, ''''pancake'''' configuration, with a rotor inside the evacuated envelope of the X-ray tube, and with an externally positioned stator.
Inventors
- 👤 Victor E De Lucia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:27
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/1024; H01J2235/00; H01J2235/10; H01J2235/1026; H01J2235/1033; H01J2235/104; H01J2235/12; H01J2235/1225; H01J2235/1262; H01J2235/1266
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A drive motor for driving an instrumentality within a sealed envelope said sealed envelope including an end wall formed of nonmagnetic material, a tubular hub member having a closed inner end extending through the end wall of said envelope, a rotor mounted within said envelope for rotation about a particular axis and mechanically coupled to said instrumentality; bearing means mounted on said tubular hub member within said envelope for rotatably supporting said rotor in coaxial relationship with said tubular hub member; and a stator mounted against the external surface of said end wall in coaxial relationship with said rotor externally of said envelope and adjacent said rotor to induce a torque-producing magnetic field in said rotor.
Claim 2
Dependent Claim
116 words
A drive motor for driving an instrumentality within a sealed envelope said sealed envelope including an end wall formed of nonmagnetic material, a tubular hub member having a closed inner end extending through the end wall of said envelope, a rotor mounted within said envelope for rotation about a particular axis and mechanically coupled to said instrumentality; bearing means mounted on said tubular hub member within said envelope for rotatably supporting said rotor in coaxial relationship with said tubular hub member; and a stator mounted against the external surface of said end wall in coaxial relationship with said rotor externally of said envelope and adjacent said rotor to induce a torque-producing magnetic field in said rotor.
Claim 3
Dependent Claim
18 words
The drive motor defined in claim 1, in which said rotor and stator each have a disc-shaped configuration.
Claim 4
Dependent Claim
29 words
The drive motor defined in claim 1, which includes means mounting said stator directly against the external surface of said end wall and in coaxial relationship with said rotor.
Claim 5
Dependent Claim
21 words
The drive motor defined in claim 1, in which the instrumentality driven thereby comprises a target electrode for an X-ray tube.
Claim 6
Dependent Claim
62 words
The drive motor defined in claim 1, in which said rotor is formed of magnetizable material and has an annular configuration, and in which said rotor includes electrically conductive rings on the inner and outer peripheral surfaces thereof and a plurality of generally radial electrically conductive rods interconnecting said rings so as to impart induction-winding squirrel cage electrical characteristics to said rotor.
Claim 7
Dependent Claim
26 words
The drive motor defined in claim 5, in which said rotor is composed of iron and in which said rings and rods are composed of copper.
Claim 8
Dependent Claim
18 words
The drive motor defined in claim 1, in which said rotor is composed of a solid magnetizable material.
Claim 9
Dependent Claim
34 words
The drive motor defined in claim 1, and which includes conduit means extending into said tubular hub member for introducing a coolant into the interior of said drive motor to cool said bearing means.
Claim 10
Dependent Claim
31 words
The drive motor defined in claim 1, in which said bearing means includes balls and races formed of stainless steel, and in which said balls are silver plated for lubricating purposes.
References Cited (Backward Citations)
GB602750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |