Patent FR1125621A successfully refreshed from Google Patents.
US4528991A
Expired / Lapsed
US
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Microwave applicator for creating local hyperthermias
Assignee: Centre National de la Recherche Scientifique
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Filing: 1982-06-30
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Granted: 1985-07-16
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Expires: 2002-06-30
Abstract
Abstract An applicator of microwaves, has a first mass connected to a wave guide and associated with a heat exchanger in connection with a circuit for circulation of a cooling fluid on the one hand, and a second mass in the form of an envelope concentric with respect to the first mass connected to the return of the wave guide and having an annular base associated with a heat exchanger in connection with a circuit for circulation of a cooling fluid. The invention is particularly directed to the treatment of cancerous tumors.
Inventors
- 👤 Andre Dittmar
- 👤 Georges Delhomme
- 👤 Jean-Pierre Pellissier
- 👤 Michel Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/02; A61N5/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
193 words
A microwave applicator for creating local hyperthermias, said applicator being of the type comprising first and second metallic masses having high heat conductivity and different polarities and being disposed without direct physical contact with each other, said first mass being associated with a wave guide for microwaves produced by a microwave generator, comprising: (a) a microwave wave guide; (b) a cooling fluid circulation circuit; (c) a first metallic mass electrically connected to said microwave wave guide and having a first application surface, a first heat exchanger being disposed adjacent said first application surface, said first heat exchanger being associated with said cooling fluid circulation circuit; and (d) a second metallic mass including an envelope portion disposed substantially concentrically with respect to said first metallic mass and electrically connected to a return associated with said wave guide, said evenlope portion surrounding said first metallic mass without physical contact therewith and including an annular base having a second application surface, said second application surface being substantially coplanar with said first application surface, a second heat exchanger being disposed adjacent said second application surface, said second heat exchanger being associated with said cooling fluid circulation circuit.
Claim 2
Dependent Claim
193 words
A microwave applicator for creating local hyperthermias, said applicator being of the type comprising first and second metallic masses having high heat conductivity and different polarities and being disposed without direct physical contact with each other, said first mass being associated with a wave guide for microwaves produced by a microwave generator, comprising: (a) a microwave wave guide; (b) a cooling fluid circulation circuit; (c) a first metallic mass electrically connected to said microwave wave guide and having a first application surface, a first heat exchanger being disposed adjacent said first application surface, said first heat exchanger being associated with said cooling fluid circulation circuit; and (d) a second metallic mass including an envelope portion disposed substantially concentrically with respect to said first metallic mass and electrically connected to a return associated with said wave guide, said evenlope portion surrounding said first metallic mass without physical contact therewith and including an annular base having a second application surface, said second application surface being substantially coplanar with said first application surface, a second heat exchanger being disposed adjacent said second application surface, said second heat exchanger being associated with said cooling fluid circulation circuit.
Claim 3
Dependent Claim
63 words
The applicator as recited in claim 1, wherein said first heat exchanger includes a recess formed in said first metallic mass and connected to said cooling fluid circulation circuit by at least two connection elements, and said second heat exchanger includes a recess formed in said second metallic mass and connected to said cooling fluid circulation circuit by at least two connection elements.
Claim 4
Dependent Claim
19 words
The applicator as recited in claim 2, wherein said first and second heat exchangers are substantially concentric and coplanar.
Claim 5
Dependent Claim
54 words
The applicator as recited in claim 1 or 2, wherein said circulation circuit comprises first and second circulation circuits having first and second regulating means to regulate fluid flow through said first and second circulation circuits respectively, said first and second heat exchangers being connected to different ones of said first and second circuits.
Claim 6
Dependent Claim
33 words
The applicator as recited in claim 4, wherein said first heat exchanger includes a recess having circulation disturbing means for providing distributed flow and increased cooling fluid circulation inside said first heat exchanger.
Claim 7
Dependent Claim
33 words
The applicator as recited in claim 4, wherein said second heat exchanger includes a recess having circulation disturbing means for providing distributed flow and increased cooling fluid circulation inside said second heat exchanger.
Claim 8
Dependent Claim
44 words
The applicator as recited in claim 2, wherein said first heat exchanger includes a recess formed in said first metallic mass in said first application surface, said recess having a substantially constant depth and being closed by a cover which comprises a conductive plate.
Claim 9
Dependent Claim
44 words
The applicator as recited in claim 2, wherein said second heat exchanger includes a recess formed in said second metallic mass in said second application surface, said recess having a substantially constant depth and being closed by a cover which comprises a conductive plate.
Claim 10
Dependent Claim
45 words
The applicator as recited in claim 1, wherein said second metallic mass is bell-shaped and includes means for supporting said wave guide, for supporting connection elements for connecting said first heat exchanger with said cooling fluid circulation circuit, and for supporting said first metallic mass.
Claim 11
Dependent Claim
22 words
The applicator as recited in claim 1, wherein said first and second application surfaces are connected by a foil of insulating material.
Claim 12
Dependent Claim
22 words
The applicator as recited in claim 1, wherein said first and second application surfaces are connected by a film of insulating material.
Claim 13
Dependent Claim
16 words
The applicator as recited in claim 1, wherein said first metallic mass includes a central recess.
References Cited (Backward Citations)
DE868324C
Cited
US2567757A
Cited
FR2068970A5
Cited
FR2178049A1
Cited
US4140130A
Cited
US4240445A
Cited
WO1980001462A1
Cited
US4341227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |