US5026959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave radiator for warming therapy
Assignee: Tokyo Keiki Inc
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Filing: 1989-10-18
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Granted: 1991-06-25
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Expires: 2009-10-18
Abstract
Abstract This invention relates to a microwave radiator for warming therapy inserted into a human body to cure focuses of the body such as tumors. It has a first and second high-frequency coaxial cable. The second high-frequency coaxial cable has an inner conductor and a plurality of ring conductors disposed at the outer periphery of the inner conductor via a dielectric. The second high-frequency coaxial cable is inserted into the focuses of the body, and warming therapy can be conducted using radiated electromagnetic waves.
Inventors
- 👤 Koichi Ito
- 👤 Motomu Matsunaga
- 👤 Satoru Kurokawa
- 👤 Koji Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/72; A; A61; A61B; A61B18/00; A61B18/18; A61B18/1815
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
137 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; and a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed around said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings, in a direction generally perpendicular to said axial length of said inner conductor.
Claim 2
Dependent Claim
137 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; and a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed around said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings, in a direction generally perpendicular to said axial length of said inner conductor.
Claim 3
Dependent Claim
19 words
A microwave radiator for therapeutic treatment according to claim 1, wherein the distance between adjacent spaced rings is constant.
Claim 4
Dependent Claim
21 words
A microwave radiator for therapeutic treatment according to claim 1, wherein the distance between pairs of adjacent rings is not equal.
Claim 5
Dependent Claim
19 words
A microwave radiator for therapeutic treatment according to claim 3, wherein the axial width of said rings is constant.
Claim 6
Dependent Claim
32 words
A microwave radiator for therapeutic treatment according to claim 1, wherein the distance between pairs of said spaced rings becomes progressively smaller along the longitudinal axis of the said second coaxial cable.
Claim 7
Dependent Claim
61 words
A microwave radiator for therapeutic treatment according to claim 1, said radiator further having an end and further comprising an end cap disposed at said end of said radiator and joining said inner conductor with a ring of said second coaxial cable, and a skirt flange surrounding and attached to the outside of said outer conductor of said first coaxial cable.
Claim 8
Dependent Claim
30 words
A microwave radiator for warming therapy according to claim 6, wherein said end cap has a characteristic impedance that substantially matches the characteristics impedance of the said first coaxial cable.
Claim 9
Dependent Claim
44 words
A microwave radiator for warming therapy according to claim 1, said radiator further having an end and further comprising an end cap disposed at said end of said radiator and joining said inner conductor with a ring of said second high frequency coaxial cable.
Claim 10
Dependent Claim
17 words
The microwave radiator for therapeutic treatment according to claim 8, wherein said end cap is a conductor.
Claim 11
Dependent Claim
186 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed around said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings in a direction generally perpendicular to the axial direction of said inner conductor; and an end cap disposed at the end of the radiator and joining said inner conductor with a ring of said second high frequency coaxial cable, wherein said end cap has a characteristic frequency value substantially the same as the characteristic impedance value of the first high frequency coaxial cable.
Claim 12
Dependent Claim
186 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed around said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings in a direction generally perpendicular to the axial direction of said inner conductor; and an end cap disposed at the end of the radiator and joining said inner conductor with a ring of said second high frequency coaxial cable, wherein said end cap has a characteristic frequency value substantially the same as the characteristic impedance value of the first high frequency coaxial cable.
Claim 13
Dependent Claim
158 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed about said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings in a direction generally perpendicular to the axial direction of said inner conductor; and a skirt surrounding said outer conductor of said first high frequency coaxial cable, to alter the current flowing along the radiator.
Claim 14
Dependent Claim
158 words
A microwave radiator having an axially extending length, for therapeutic treatment, said radiator comprising: an inner conductor extending along the axial length of said radiator; a first high frequency coaxial cable, comprising an outer conductor and a portion of said inner conductor, said outer conductor being coaxially disposed about said inner conductor and extending along said portion of said inner conductor; a dielectric disposed between said inner conductor and said outer conductor and extending along the entire length of said inner conductor; a second high frequency coaxial cable adjacent to said first coaxial cable, said second coaxial cable having spaced conductive rings disposed about said dielectric along a remaining portion of said inner conductor, whereby electromagnetic radiation may flow in between said rings in a direction generally perpendicular to the axial direction of said inner conductor; and a skirt surrounding said outer conductor of said first high frequency coaxial cable, to alter the current flowing along the radiator.
Claim 15
Dependent Claim
30 words
A microwave radiator for therapeutic treatment according to claim 11, wherein the mounting position of the said skirt can be axially adjusted to alter the current flowing in the radiator.
Claim 16
Dependent Claim
27 words
A microwave radiator for therapeutic treatment according to claim 11, wherein the diameter of said skirt can be altered to change the current flowing in said radiator.
Claim 17
Dependent Claim
34 words
A microwave radiator for therapeutic treatment according to claim 11, wherein said skirt has a length in the axial direction of about 1/4 of the wavelength of the electromagnetic wave emitted by the radiator.
Claim 18
Dependent Claim
33 words
A microwave radiator for therapeutic treatment according to claim 11, wherein said skirt has a length in the axial direction of about 1/2 the wavelength of the electromagnetic wave emitted by the radiator.
Claim 19
Dependent Claim
22 words
A microwave radiator for therapeutic treatment according to claim 11, wherein said skirt is attached to the outside of said outer conductor.
Claim 20
Dependent Claim
15 words
A microwave radiator for therapeutic treatment according to claim 16, wherein said skirt is short-circuited.
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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) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |