US5165093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interstitial X-ray needle
Assignee: Engility LLC
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Filing: 1992-03-23
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Granted: 1992-11-17
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Expires: 2012-03-23
Abstract
Abstract An interstitial X-ray needle includes an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into X-ray; a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and a pipe coaxially disposed between the casing and the tube for defining an inner annular flow chamber between the tip of the tube and a coolant inlet in the casing and an outer annular flow chamber between the tip of the tube and a coolant outlet in the casing.
Inventors
- 👤 Robert B. Miller
- 👤 John R. Smith
- 👤 Carl A. Muehlenweg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:35
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; H; H01; H01J; H01J35/00; H01J35/02; H01J35/14; H01J35/32; A61N5/1027; H01J2235/00; H01J2235/12; H01J2235/1204; H01J2235/1225; H01J2235/1262
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
An interstitial X-ray needle, comprising an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into X-rays: a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and means within the casing defining coolant flow chambers for directing coolant to and from the tip of the tube.
Claim 2
Dependent Claim
92 words
An interstitial X-ray needle, comprising an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into X-rays: a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and means within the casing defining coolant flow chambers for directing coolant to and from the tip of the tube.
Claim 3
Dependent Claim
60 words
A needle according to claim 1, wherein the flow-chamber-defining means comprises a pipe coaxially disposed between the casing and the tube for defining an inner annular flow chamber between the tip of the tube and a first opening in the casing and an outer annular flow chamber between the tip of the tube and a second opening in the casing.
Claim 4
Dependent Claim
78 words
A needle according to claim 1, wherein the flow-chamber-defining means comprises a plurality of pipes disposed between the casing and the tube wherein each pipe defines an input flow chamber between the tip of the tube and at least one inlet opening in the casing and wherein the space between the tube and the casing not occupied by the pipes defines an output flow chamber between the tip of the tube and an outlet opening in the casing.
Claim 5
Dependent Claim
119 words
An interstitial X-ray needle, comprising an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into X-rays; a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electronss within a narrow beam; an elongated outer casing enclosing the tube and coil, wherein a portion of the casing extending at least approximately five centimeters from the tip of the tube has a maximum outside diameter of approximately two millimeters; and means within the casing defining coolant flow chambers for directing coolant to an from the tip of the tube.
Claim 6
Dependent Claim
119 words
An interstitial X-ray needle, comprising an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into X-rays; a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electronss within a narrow beam; an elongated outer casing enclosing the tube and coil, wherein a portion of the casing extending at least approximately five centimeters from the tip of the tube has a maximum outside diameter of approximately two millimeters; and means within the casing defining coolant flow chambers for directing coolant to an from the tip of the tube.
Claim 7
Dependent Claim
59 words
A needle according to claim 4, wherein the flow-chamber-defining means comprises a pipe coaxially disposed between the casing and the tube for defining an inner flow chamber between the tip of the tube and a first opening in the casing and an outer annular flow chamber between the tip of the tube and a second opening in the casing.
Claim 8
Dependent Claim
78 words
A needle according to claim 4, wherein the flow-chamber-defining means comprises a plurality of pipes disposed between the casing and the tube wherein each pipe defines an input flow chamber between the tip of the tube and at least one inlet opening in the casing and wherein the space between the tube and the casing not occupied by the pipes defines an output flow chamber between the tip of the tube and an outlet opening in the casing.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |