US4487253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger for cryosurgical instruments
Assignee: VYZKUMNY USTAV SILNORPROUDE ELEKTROTECHNIKY
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Filing: 1981-11-05
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Granted: 1984-12-11
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Expires: 2001-11-05
Abstract
Abstract A heat exchanger for cryosurgical instruments comprises a mantle containing individual layers of a heat exchange substance, such as a heat exchange material or a heat exchange filler, an outer jacket surrounding the mantle, a contact zone within the outer jacket for receiving cooling fluid, and a heat detector in thermal contact with the outer jacket but separated by the mantle from the cooling fluid contact zone. Each of the individual layers of heat exchange substance is positioned within the mantle a spaced distance from every other individual layer, so that these individual layers of heat exchange substance are mutually separated from one another.
Inventors
- 👤 Zdenek Malek
- 👤 Stanislav Jelinek
- 👤 Alexandr Belling
- 👤 Vladimir Matena
- 👤 Jan Jelinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:25
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; A; A61; A61B; A61B18/00; A61B18/02; F28; F28D; F28D9/00; F28D9/0006; A61B2018/00005; A61B2018/00041; A61B2018/0231; A61B2018/0262; A61B2018/0268; A61B2018/0275; A61B2018/0281; A61B2018/0287; Y; Y10; Y10S; Y10S165/00; Y10S165/001; Y10S165/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A heat exchanger for cryosurgical instruments comprising a mantle containing individual layers of a heat exchange substance selected from the group consisting of a heat exchange material and a heat exchange filler, an outer jacket surrounding said mantle and said individual layers of heat exchange substance, means defining a contact zone within said outer jacket for receiving the cooling fluid of said heat exchanger, said mantle further comprising a first heat exchange chamber containing a heat detector, said heat exchange chamber and said heat detector both being separated by said mantle from said means defining said contact zone, and wherein said heat detector is in thermal contact with said outer jacket, and each of said individual layers is positioned within said mantle a spaced distance from every other individual layer, so that said individual layers of said substance are mutually separated from one another.
Claim 2
Dependent Claim
144 words
A heat exchanger for cryosurgical instruments comprising a mantle containing individual layers of a heat exchange substance selected from the group consisting of a heat exchange material and a heat exchange filler, an outer jacket surrounding said mantle and said individual layers of heat exchange substance, means defining a contact zone within said outer jacket for receiving the cooling fluid of said heat exchanger, said mantle further comprising a first heat exchange chamber containing a heat detector, said heat exchange chamber and said heat detector both being separated by said mantle from said means defining said contact zone, and wherein said heat detector is in thermal contact with said outer jacket, and each of said individual layers is positioned within said mantle a spaced distance from every other individual layer, so that said individual layers of said substance are mutually separated from one another.
Claim 3
Dependent Claim
57 words
The heat exchanger of claim 1, further comprising an inlet fluid flow tube which extends into the heat exchanger and through said individual layers of heat exchange substance and is terminated in said contact zone of said outer jacket, and said inlet fluid flow tube having a longitudinal axis parallel to the longitudinal axis of said mantle.
Claim 4
Dependent Claim
20 words
The heat exchanger of claim 1, wherein said mantle further comprises a second heat exchange chamber containing a heating element.
References Cited (Backward Citations)
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |