GB2032255A - A protective suit and method of cooling a wearer of the suit - Google Patents
A protective suit and method of cooling a wearer of the suit Download PDFInfo
- Publication number
- GB2032255A GB2032255A GB7935036A GB7935036A GB2032255A GB 2032255 A GB2032255 A GB 2032255A GB 7935036 A GB7935036 A GB 7935036A GB 7935036 A GB7935036 A GB 7935036A GB 2032255 A GB2032255 A GB 2032255A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ducts
- suit
- wearer
- protective suit
- protective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
- A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
- A41D13/0053—Cooled garments
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/005—Active or passive body temperature control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
- F25D3/14—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow portable, i.e. adapted to be carried personally
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/26—Refrigerating devices for cooling wearing apparel, e.g. garments, hats, shoes or gloves
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Combustion & Propulsion (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
A protective suit is disclosed which has a layer provided with first ducts (5) for a liquid coolant for cooling a wearer of the suit and with second ducts (6) for conveying a gas. The first ducts (5) are impermeable, whereas the second ducts (6) are permeable at least to water vapour; in use, gas is passed through the second ducts (6) to and draw off water vapour which has passed into the ducts (6) from the wearer. Both the first ducts (5) and the second ducts (6) are adjacent an inner surface of the suit so as, in use, to be adjacent the wearer of the suit, thereby effectively cooling the wearer and effectively reducing humidity for the wearer. Also disclosed is a method of cooling a body within such a protective suit. <IMAGE>
Description
SPECIFICATION
A protective suit and method of cooling a wearer of the suit
This invention relates to a protective suit and to a method of cooling a human or animal body wearing such a suit.
The human body constantly produces heat by metabolism. This heat normally passes into the atmosphere by radiation, conduction, convection and evaporation of water. The thermal equilibrium necessary, so that the body temperature does not rise above the physiological limits, can be achieved only if the environment is able to absorb the heat as quickly as it is produced.
United States Patent Specification 3,174,300 describes a suit which protects dangerous substances and temperature influences. The suit has, inside an insulating outer suit, an inner suit consisting of two layers made of a porous fabric which may be penetrated by air, and, between the layers of fabric, a network of ducts. This network serves the purpose of conducting air and is connected to an air treatment apparatus housed inside the protective suit which circulates the air inside the protective suit through the ducts, over the body surface and through the space between the inner and outer suits. Undesired heat is drawn off by the air which itself is renewed in the air treatment apparatus and cooled by heat by transfer to a regenerable heat store, surplus moisture being condensed out at the same time.The shallow ducts made of sealed plastic sheets are provided internally with porous spacers which do not hinder the through-flow. On the side facing the body the ducts are provided with small openings at the points where air is to pass over the body surface of the wearer. In addition to body heat the air flow also takes with it moisture as evaporated perspiration. A drawback of this known protective suit is that under more difficult operating conditions the heat dissipation is unsatisfactory when air alone is used as the heat carrier. The heat store provided has a limited absorption capacity and does not allow of more prolonged applications. (US 3 174 300).
United States Patent Specification 3,500,827 describes a double-layered suit for protection against severe environmetal conditions. The outer chamber of the protective suit, formed between the double coverings, is designed in a manner not explained in more detail to receive cooling fluid. It is connected with an outer circuit in which a heat exchanger, cooled by evaporating water, is provided to conduct off the heat from the cooling fluid and a rotary pump is provided for circulating the cooling fluid. Two further heat exchangers in which respiratory gas and additional oxygen are cooled by the cooling fluid are arranged in the circuit. The inner chamber of the protective suit is put under pressure and filled by a respirable gas. The inner chamber is connected with a closed respiratory circuit. The respirable gas is circulated by a fan.The gas issuing from the protective suit is conducted via a carbon dioxide absorber and dried and cooled in a heat exchanger.
The moisture carried along from the inner chamber of the protective suit is thereby condensed; it is collected in a vessel. After being enriched with oxygen the gas is again passed into.the inner chamber of the protective suit. The circulating pump for the cooling fluid and the fan for the respiratory gas are combined to form one structural unit and are driven by a common electric motor by means of a battery. It is a disadvantage that theheat transfer between the body surface and the cooling fluid system is prevented by the internal respiratory gas volume and its effectiveness is reduced, The respira tory gays in the inner chamber of the protective suit is loaded with all the exhaled moisture and is hardly suitable for absorbing additional moisture from the skin.In addition., the ventilation of the body surface is dependent on the respective position of the protective suit and is not always guaranteed for all surfaces of the body (US 3 500 827).
According to the present invention there is provided a protective suit having a layer provided with (a) a plurality of first ducts which are impermeable and through which, in use, a liquid coolant is passed to cool a wearer of the suit, and (b) a plurality of second ducts which are permeable at least to water vapour and through which, in use, a gas is passed to entrain and draw off water vapour passing from the' wearer into the second ducts, wherein both of the first ducts and the second ducts are adjacent an inner surface of the suit so as, in use, to be adjacent the wearer of the suit.
The liquid coolant flowing through the first or liquid ducts adjacent to the body, provides intensive cooling while perspiration and moisture on the body surface are simultaneously eliminated by the ventilation with dried gas, for example air, via the second or gas ducts adjacent to the body of the wearer of the suit whereby the inner chamber of the heat protective suit is dried. The general well-being and performance of the person wearing the suit are thereby maintained, The fixed distribution of the first and second ducts produces a defined and reliable distribution of the cooling and moisture absorption for the various parts of the body.
Preferably the protective suit includes a first pumping means and a first cooling meansforthe liquid coolant passed through the first ducts, and a second pumping means and a second cooling means for the gas passed the second ducts.
A simple solution for operation and supply of the liquid coolant and the gas is achieved by using a common heat exchanger as the first and second cooling means for the liquid and the gas. The replenishment and control of the cooling agent vapour produced are then concentrated at a single location.
The first pumping means and the first cooling means can be connected to the first ducts by a first system of lines and the second pumping means and the second cooling means can be connected to the second ducts by a second system of lines.
The first and second cooling means conveniently comprise separate passages around a housing which is intended, in use, to be filled with a substance at a low temperature. The housing can be provided with resilient biasing means for urging the substance at low temperature towards one end of the housing. The housing can be filled with solid carbon dioxide which constitutes the substance.
-The first and second pumping means may be driVen by a common motor.
Preferably the heat transferred to the substance in the housing causes the substances to vaporise and the resultant vapour is used to drive the common motor which is a gas or vapour driven motor.
The common motor can be a turbine motor.
Advantageously an inner surface of the suit is covered by a layer of porous sheet-form material which abuts those side regions of the first ducts which, in use, are nearest the wearer of the suit, the porous sheet-form material also defining those side regions of the second ducts which,in use, are nearest the wearer of the suit.
The sheet-form material can be absorbent and can have an open cell structure. Alternatively the sheetform material can comprise a perforated sheet.
Instead of a layer of sheet-form material, the first and second ducts can be spaced apart from one another two define chambers therebetween, the chambers being in communication with the interior of the second ducts so that, in use, water vapour from the wearer of the suit can pass through the chambers into the second ducts.
The present invention also provides a method of cooling a human or animal body wearing a protective suit according to the present invention, wherein a liquid coolant is.cooled and passed through the first ducts to cool the wearer of the suit, and a gas is passed through the second ducts to entrain and carry off moisture produced by the wearer of the suit.
The use of the vapour, from the substance at low temperature, to drive the common motor renders the protective suit independent of other power sources.
By arranging the first and second ducts alterna tively,. uniform distribution of the two media, gas and liquid coolant, is obtained. Also, if the liquid coolant is under a sufficient pressure, the first ducts inflated by the liquid coolant provide a support for the second ducts. The second ducts can have a variety of constructions depending, for example, on whether they are to be in contact with the wearer, the operating conditions and the expected moisture production.
For a better understanding of the present invention and to show more clearly how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
Figure 1 shows one embodiment of a protective suit, according to the present invention in partial section;
Figure 2 shows a diagram of fluid circuits of the protective suit of Figure 1;
Figure 3 shows a cross-section through a first embodiment of an inner layer of a protective suit;
Figure 4 shows a cross-section through a second embodiment of an inner layer of a protective suit; and
Figure 5 shows a cross-section through a third embodiment of an inner layer of a protective suit.
Referring to Figure 1, the protective suit is a heat protective suit which has an outer covering 1 and an inner covering 2 which comprises an inner layer. At the head, the cover 1 comprises a helmet 3 and is resistant to external influences and is constructed, for example by means of a suitable surface design, to minimize heat entering into the suit from outside.
The inner covering 2 is an inner layer with its inner side 4 adjacent the body surface, or any clothes, of a wearer of the suit The covering 2 has a layer of first or liquid ducts 5 and second or gas ducts 6 arranged alternatively in side-by-side relationship. The ducts 5 and 6 are linked to a heat exchanger 7 which is carried on the back of a wearer of the protective suit
The heat exchanger 7 comprises a housing 8 for a coolant 9 which comprises solid carbon dioxide (dry ice). The coolant 9 is urged by means of a pressure plate 11 acted upon by a spring 10 towards one end ofthe housing 8-and against the walls ofthe housing 8. First coolant means 12 for the liquid and second cooling means 13 for the gas comprise passages or chambers around the housing 8.This achieves an improved transfer of heat and a reliable operation of the heat exchanger 7 which is not dependent on its position. A line 14 is used for the separate supply of respiratory gas to the wearer of the suit.
Referring to Figure 2, a first system of lines 27 are provided for the liquid coolant, a silicone oil which remains sufficiently fluid even at low temperatures.
The first system of lines connects the ducts 5 to a first pumping means 16, which together with a second pumping means 17 for the gas is driven by a C 2 gas motor 15. The first pumping means 16 pumps liquid through the first ducts 5 and the first cooling means 12. During the period in the first ducts 5 the coolant absorbs the heat, which has been produced by the wearer of the suit and heat which has penetrated from outside through the covering 1, and the resultant hot coolant is pumped to the first cooling means 12. After the heat has been conducted off here from the coolant in the cooling means 12, the coolant is again supplied to the first ducts 5 and cools the body surface of the person wearing the suit.The heat drawn off from the coolant in the first cooling means 12 causes sublimation of the coolant 9 present in solid form as solid C02. The resultant carbon dioxide gas flows through a line 18 to drive the gas motor 15.
At a gas inlet 19 ambient air is drawn into a second system of lines 28 by the second pumping means 17 for the gas. The air is then cooled in the second cooling means 13 and thus dried by means of the precipitation of the moisture. By means of the second pumping means 17, the air which has been thus prepared reaches the second ducts 6 where it entrains and carries off the moisture generated on the body surface of the suit wearer. The airthen passes back into the atmosphere via a gas outlet 20.
Referring to Figure 3, the first ducts 5 and the second ducts 6 are arranged alternatively in side-byside relationship in the covering 2. In the first embodiment, on the inside 4 of the covering 2 the ducts 5 and 6 are covered with an absorbent layer 21 of a sponge-like sheet-form material, which is formed of wool. The side of the first ducts 5 nearest the wearer of the suit abut and are closed to the layer 21, while the sides of the second ducts 6 nearest the wearer are defined by the layer 21. Moisture produced on the body surface 22 of the wearer of the suit is aborbed by the absorbency of the layer 21 and is then entrained and carried off by the air in the second ducts 6.
In a second embodiment shown in Figure 4, the first ducts 5 and the second ducts 6 are covered on the inside 4 of the covering 2 by a perforated sheet 23, the side of the second ducts 6 nearest the wearer being defined by the sheet 23. Again the sides of the first ducts 5 nearest the wearer abut and are closed to the sheet 23. In this construction the moisture produced on the body surface 22 of the wearer evaporates through the perforations of the sheet 23 into the second ducts 6 or the moisture is absorbed by the air circulating through the perforations.
In a third embodiment shown in Figure 5, the first ducts 5 and the second ducts, which have the reference 24 in this Figure, are spaced apart from one another to define distribution chambers 26 therebetween. The cross section of the second ducts 24 is open via openings 25 and the distribution chambers 26 to the inside 4 of the covering 2 and thus to the body surface 22. The air thereby passes out of the gas ducts 24 via the openings 24 into the distribution chambers 26 and directly evaporates the moisture occurring on the body surface 22.
Claims (16)
1. A protective suit having a layer provided with (a) a plurality of first ducts which are impermeable and through which, in use, a liquid coolant is passed to cool a wearer of the suit, and (b) a plurality of second ducts which are permeable at least to water vapour and through which, in use, a gas is passed to entrain and draw off water vapour passing from the wearer into the second ducts, wherein both the first ducts and the second ducts are adjacent an inner surface of the suit so as, in use, to be adjacent the wearer of the suit.
2. A protective suit as claimed in claim 1, which includes a first pumping means and a first cooling means for the liquid coolant passed through the first ducts, and a second pumping means and a second coolant means for the gas passed the second ducts.
3. A protective suit as claimed in claim 2, wherein the first pumping means and the first cooling means are connected to the first ducts by a first system of lines and the second pumping means and the second cooling means are connected to the second ducts by a second system of lines.
4. A protective suit as claimed in claim 2 or 3, wherein the first and second cooling means comprise separate passages around a housing which is intended, in use, to be filled with a substance at a low temperature.
5. A protective suit as claimed in claim 4, including resilient biasing means for urging the substance at low temperature towards one end of the housing.
6. A protective suit as claimed in claim 4 or 5, wherein the housing is filled with solid carbon dioxide which constitutes said substance.
7. A protective suit as claimed in any one of claims 2 to 6, wherein the first and second pumping means are driven by a common motor.
8. A protective suit as claimed in claim 7, when appendant to claim 4, wherein, in use, the heat transferred to the substance in the housing causes the substance to vaporise and the resultant vapour is used to drive the common motor which is a gas or vapour driven motor.
9. A protective suit as claimed in claim 8, wherein the common motor comprises a turbine motor.
10. A protective suit as claimed in any preceding claim, wherein the first and second ducts are arranged alternatively in side-by-side relationship.
11. A protective suit as claimed in any preceding claim, wherein an inner surface of the suit is covered by a layer of porous sheet-form material which abuts those side regions of the first ducts which, in use, are nearest the wearer of the suit, the porous sheet-form material also defining those side regions of the second ducts which, in use, are nearest the wearer of the suit.
12. A protective suit as claimed in claim 11, wherein the sheet-form material is absorbent and has an open cell structure.
13. A protective suit as claimed in claim 11, wherein the sheet-form material comprises a perforated sheet.
14. A protective suit as claimed in any one of claims 1-10, wherein the first and second ducts are spaced apart from one another to define chambers between, the chambers being in communication with the interior of the second ducts so that, in use, water vapour from the wearer of the suit can pass through the chambers into the second ducts.
15. A protective suit substantially as hereinbefore described with reference to, and as shown in,
Figures 1 and 2 and Figure 3,4 or 5 of the accompanying drawings.
16. A method of cooling a human or animal body wearing a protective suit as claimed in any preceding claim, wherein a liquid coolant is cooled and passed through the first ducts to cool the wearer of the suit, and a gas is passed through the second ducts to entrain and carry off moisture produced by the wearer of the suit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782846139 DE2846139C2 (en) | 1978-10-23 | 1978-10-23 | Thermal suit that has a cooling system for cooling the wearer's body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2032255A true GB2032255A (en) | 1980-05-08 |
| GB2032255B GB2032255B (en) | 1982-09-29 |
Family
ID=6052920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7935036A Expired GB2032255B (en) | 1978-10-23 | 1979-10-09 | Protective suit and method of cooling a wearer of the suit |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE879556A (en) |
| DE (1) | DE2846139C2 (en) |
| FR (1) | FR2439594A1 (en) |
| GB (1) | GB2032255B (en) |
| PL (1) | PL123947B1 (en) |
| SE (1) | SE7908723L (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2130871A (en) * | 1982-11-23 | 1984-06-13 | Terence David Walker | Improved diving suit |
| FR2668069A1 (en) * | 1990-10-18 | 1992-04-24 | Dassault Avions | Device, in particular an independent portable device for extracting heat from a source of heat |
| FR2669541A1 (en) * | 1990-11-27 | 1992-05-29 | Intertechnique Sa | PROTECTIVE EQUIPMENT FOR SCAPHANDRE. |
| US6349412B1 (en) * | 2000-11-06 | 2002-02-26 | Hamilton Sundstrand Corporation | Medical cooling vest and system employing the same |
| US6584798B2 (en) | 2000-02-17 | 2003-07-01 | Robert Schegerin | Individual cooling system |
| US6796304B2 (en) | 2002-04-12 | 2004-09-28 | 3M Innovative Properties Company | Personal containment system with sealed passthrough |
| WO2004111560A1 (en) * | 2003-06-16 | 2004-12-23 | Dupont Canada Inc. | Cooling device with an ice pack, in particular for a cooled garment |
| US6948191B2 (en) | 2002-04-12 | 2005-09-27 | 3M Innovative Properties Company | Personal protective suit with partial flow restriction |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3045110C1 (en) * | 1980-11-29 | 1982-07-22 | Drägerwerk AG, 2400 Lübeck | Refrigeration device for heat protection systems in heat protection |
| DE3102443C2 (en) * | 1981-01-26 | 1982-12-02 | Drägerwerk AG, 2400 Lübeck | Cooling suit with ice cooling system |
| DE4431388C2 (en) * | 1994-08-25 | 2001-02-22 | Helmut Stach | Device for receiving and delivering thermal energy |
| DE19547795C2 (en) * | 1995-12-20 | 1998-08-20 | Sd & E System Design & Enginee | Special suit |
| DE10049418C1 (en) * | 2000-10-05 | 2002-03-28 | Saechsisches Textilforsch Inst | Protective clothing element can be tempered and consists of textile structure and flexible tubes worked into weft |
| DE102008019513B3 (en) | 2008-04-18 | 2009-08-27 | Dräger Safety AG & Co. KGaA | Protective clothing for use in chemical industry, has blower to circulate air in inner area, and supply provided for coolant for moistening of porous material, where supply is water tank attached to outer side of clothing |
| DE102008060826B3 (en) * | 2008-12-05 | 2010-02-11 | Dräger Safety AG & Co. KGaA | Cooling device for protecting clothing in chemical industry, has set of reservoirs connected with heat exchanger, where reservoirs are filled with endothermic substance that reacts with water |
| CN115120899B (en) * | 2022-06-28 | 2023-07-25 | 浙江蓝天制衣有限公司 | Functional firefighter uniform capable of rapidly cooling and emergency early warning method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE704407C (en) * | 1939-02-01 | 1941-03-29 | Gerold Pfister | Protective clothing |
| DE934761C (en) * | 1951-08-30 | 1956-04-19 | Franz Mehlhart | Heat protective clothing |
| BE534333A (en) * | 1953-12-23 | |||
| US3174300A (en) * | 1960-04-27 | 1965-03-23 | Environment Inc | Personnel isolation and protection systems |
| US3242979A (en) * | 1963-08-19 | 1966-03-29 | Northrop Corp | Liquid and gas cooled garment |
| US3212286A (en) * | 1964-07-13 | 1965-10-19 | Litton Systems Inc | Space enclosure cooling arrangement |
| US3248897A (en) * | 1965-03-30 | 1966-05-03 | Stark Virgil | Air conditioning device |
| US3296819A (en) * | 1966-02-02 | 1967-01-10 | Prot Inc | Self-contained cooling system |
| US3457918A (en) * | 1967-02-13 | 1969-07-29 | Gen Electric | Permeable protective suit in combination with means for maintaining a viable atmosphere |
| FR1555832A (en) * | 1967-12-18 | 1969-01-31 | ||
| US3500827A (en) * | 1969-01-16 | 1970-03-17 | T O Paine | Portable environmental control system |
-
1978
- 1978-10-23 DE DE19782846139 patent/DE2846139C2/en not_active Expired
-
1979
- 1979-09-11 PL PL21824179A patent/PL123947B1/en unknown
- 1979-10-09 GB GB7935036A patent/GB2032255B/en not_active Expired
- 1979-10-10 FR FR7925634A patent/FR2439594A1/en active Pending
- 1979-10-22 BE BE0/197756A patent/BE879556A/en not_active IP Right Cessation
- 1979-10-22 SE SE7908723A patent/SE7908723L/en not_active Application Discontinuation
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2130871A (en) * | 1982-11-23 | 1984-06-13 | Terence David Walker | Improved diving suit |
| FR2668069A1 (en) * | 1990-10-18 | 1992-04-24 | Dassault Avions | Device, in particular an independent portable device for extracting heat from a source of heat |
| US5214926A (en) * | 1990-10-18 | 1993-06-01 | Dassault Aviation | Device, especially autonomous and portable for extracting heat from a hot source |
| FR2669541A1 (en) * | 1990-11-27 | 1992-05-29 | Intertechnique Sa | PROTECTIVE EQUIPMENT FOR SCAPHANDRE. |
| EP0488880A1 (en) * | 1990-11-27 | 1992-06-03 | Intertechnique | Protective isolation suit |
| US5339806A (en) * | 1990-11-27 | 1994-08-23 | Intertechnique | Protective equipment including a closed suit |
| US6584798B2 (en) | 2000-02-17 | 2003-07-01 | Robert Schegerin | Individual cooling system |
| US6349412B1 (en) * | 2000-11-06 | 2002-02-26 | Hamilton Sundstrand Corporation | Medical cooling vest and system employing the same |
| US6796304B2 (en) | 2002-04-12 | 2004-09-28 | 3M Innovative Properties Company | Personal containment system with sealed passthrough |
| US6948191B2 (en) | 2002-04-12 | 2005-09-27 | 3M Innovative Properties Company | Personal protective suit with partial flow restriction |
| WO2004111560A1 (en) * | 2003-06-16 | 2004-12-23 | Dupont Canada Inc. | Cooling device with an ice pack, in particular for a cooled garment |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2032255B (en) | 1982-09-29 |
| SE7908723L (en) | 1980-04-24 |
| PL123947B1 (en) | 1982-12-31 |
| DE2846139A1 (en) | 1980-04-24 |
| BE879556A (en) | 1980-02-15 |
| DE2846139C2 (en) | 1982-12-23 |
| FR2439594A1 (en) | 1980-05-23 |
| PL218241A1 (en) | 1980-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |