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US 7,127,034 B1Granted
Composite stator
AssigneeVarian Medical Systems Technologies, Inc.
InventorsDavid S. K. Lee, Paul D. Moore, John E. Postman
Life of this patent
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AssigneeVarian Medical Systems Technologies, Inc.
InventorsDavid S. K. Lee, Paul D. Moore, John E. Postman
Estimating the term…
A composite stator is disclosed for use with rotationally driven apparatus, particularly high voltage x-ray tubes. The composite stator generally comprises a core, a plurality of motor windings, and a retaining band. The core is comprised of two or more core sections having slots defined therein for receiving the motor windings. The motor windings are wound through and between the slots of the core sections, after which the core sections are joined together to form the core. The core sections are maintained in an assembled configuration by the retaining band. The motor windings are interconnected to comprise the electromagnetic pole pairs of the composite stator, thereby allowing the stator to induce the rotation of the rotor assembly of the high voltage x-ray tube.
An x-ray tube, comprising:
An x-ray tube, comprising:
An x-ray device, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Anodes; Anti cathodes: rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
Consisting of a generally annular yoke with salient poles: sectional cores
Specially adapted for operating in liquid or gas: using air-gap sleeves or air-gap discs
Means for driving the target: characterised by the shape
Term ended 8 Jun 2023 (estimated)
1. The Field of the Invention
The present invention generally relates to stators. More particularly, the present invention relates to a composite stator for use in rotationally driven systems, such as rotary anode x-ray generating devices.
2. The Related Technology
To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
FIG. 1 is a cross sectional side view of a double-ended x-ray tube incorporating various features of a first embodiment of the present invention;
FIG. 2 is a perspective view of the composite stator in accordance with the first embodiment thereof;
Reference will now be made to figures wherein like structures will be provided with like reference designations. It is understood that the drawings are diagrammatic and schematic representations of presently preferred embodiments of the invention, and are not limiting of the present invention nor are they necessarily drawn to scale. FIGS. 1–8 depict various features of embodiments of the present invention, which is generally directed to a composite stator for use with rotational apparatus, such as a high power, double-ended x-ray tube. It is noted that words such as top, bottom, upper, lower, and the like are merely descriptive terms that are used to enable a sufficient description to be made of the present invention. Such words, therefore, are not meant to restrict the present invention in any way.
Reference is first made to FIG. 1, which depicts a double-ended x-ray tube 20 incorporating a first embodiment of the composite stator 100. The x-ray tube 20 preferably includes a vacuum enclosure 22 comprising a top section 24 and a bottom section 25. The top section 24 is preferably cylindrical in shape and defines on the bottom thereof an aperture 26. The bottom section 25 of the vacuum enclosure 22 comprises a cylindrical side wall 28 and an insulating disk 30. The side wall 28 defines an upper portion 28A having a first diameter designated in FIG. 1 by d1, and a lower portion 28B having a larger, second diameter indicated in the figure by d2. The top edge of the upper portion 28A is attached to the periphery of the aperture 26 defined by the top section 24. The lower portion 28B of the side wall 28 is attached to the insulating disk 30, which is circular so as to seal the bottom section 25 of the vacuum enclosure.
A rotary anode 34, and a cathode 36 are disposed inside the vacuum enclosure 22. The anode 34 is spaced apart from and oppositely disposed to the cathode 36 to receive electrons emitted by a filament 38 disposed in the cathode. A target surface 40 typically comprising a heavy metallic material is disposed on a graphite substrate 42 of the anode 34.