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Publication numberUS3802215 A
Publication typeGrant
Publication dateApr 9, 1974
Filing dateOct 11, 1972
Priority dateOct 6, 1971
Publication numberUS 3802215 A, US 3802215A, US-A-3802215, US3802215 A, US3802215A
InventorsA Rowe
Original AssigneeA Rowe
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cooling means for workmen
US 3802215 A
Abstract
An article adapted to be releasably fixed around a human torso, the article having pockets formed therein between inner and outer layers of heat insulating material to receive solid, volatile, expendable refrigerant, means being provided for directing gases liberated by sublimation of the said refrigerant from within each pocket to the exterior of the article on the side thereof containing the inner insulating material and consequently to the body of the wearer.
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Description  (OCR text may contain errors)

I I i United States Patent 1 1 1111 3,802,215 Rowe 1 Apr. 9, 1974 [54] COOLING MEANS FOR'WORKMEN 3,429,l38 2/ I969 Goldmerstein 62/259 3,452,554 1/1969 Smith 62/259 [761 Invent: Alexander 45 Bum 3,610,323 10/1971 Troyer 62/259 Waverly, Johannesburg Transvaal P S th Af rovmce ou "ca Primary Examiner-William J. Wye Flledi 11, 1972 Attorney, Agent, or Firm-Stevens, Davis, Miller & [21] Appl. No.: 296,541 Mosher Foreign'Application Priority Data [57] ABSTRACT I Oct. 6, 1971 South Africa 71/6699 n tic e a p d to b releasably fixed around a [52] us CL 62/259 62384 62530 human torso, the article having pockets formed 2 /23 150/2 therein between inner and outer layers of heat insulat- 511 Im. c1. .1... 1 2 511 23/12 material to receive nd "flame, expendable [58] Field of Search 62/259 384 530- /21 f'igeramrmeansbemg Pmvidedfmdirecting gaseslib' g erated by sublimation of the said refrigerant from within each pocket to the exterior of the article on the [56] References Cited side thereof containing the inner insulating material UNITED STATES PATENTS and consequently to the body of the wearer. 3,074,250 l/l963 Everett 62/259 7 Claims, 2 Drawing Figures COOLING MEANS FOR WORKMEN This invention relates to cooling means for workmen working in hot environments, for example, miners or stokers.

In order to improve the physiological conditions and consequently the work output of miners, it has been proposed to supply miners with cooling jackets. One such jacket had bags formed integrally therewith in which water was contained. A disadvantage of this type of jacket is it would have to be cooled in a refrigerator prior to use to freeze the water. Also, the said pockets would have to be completely watertight to prevent leakage. Further, for adequate cooling a heavy fixed mass is borne by the wearer.

It is the object of this invention to provide a cooling jacket or other article of clothing which has advantages over those presently known.

According to this invention there is provided an article adapted to be releasably fixed around a human torso, the article having pockets formed therein between inner and outer layers of heat insulating material to receive solid,.vo1atile refrigerant, means beingprovided for directing gases liberated by sublimation of the said refrigerant from within each pocket to the side thereof containing the inner insulating material.

Further features of the invention provide for the pockets to be situated adjacent one another along the length of the article, for said means to be a flap adapted to be folded over the upper, open ends of the pockets to overlie the inner insulating material for a portion of its height and for the outer layer of insulating material to have a higher thermal insulation than the inner one.

An alternative feature of the invention provides for said means to be embodied in the inner layer of insulating material by virtue of'it being permeable.

One embodiment of the invention is described below by way of example, reference being made to the accompanying drawings in which:

FIG. 1 is an isometric view of an article according to the invention; and

FIG. 2 is a sectional elevation taken through a pocket formed in the article.

In this embodiment of the invention the article is formed as a broad flexible belt 1. To enable it to be carried by a person at chest height, the belt is provided with a shoulder harness 2 having means for adjustment thereof, such as at 3. Straps 4 provide means for adjustably fastening the belt around the persons chest.

The belt 1 comprises an inner layer 5 and an outer layer 6 of heat-insulating material. The layers 5 and 6 are preferably formed from a single mat of insulating material folded about its longitudinal center line, as indicated by numeral 7 in FIG. 2. Both major surfaces of the said single mat forming the layers 5 and 6 are covered by a thin sheet 8 of impervious material. The sheet 8 is preferably a single sheet, shown in FIG. 2 to commence from the upper end of the outer layer 6 on the inner side thereof as at 9 and extending around the inner and outer surfaces of the layers 5 and 6 until it reaches the upper end of the outer layer 6 on the outer side thereof. From here the sheet 8 is extended a distance and returned to the point 9 where it is joined or stitched, thereby forming a flap 10.

Alternatively, the layer 5 may be of impervious material with a separate flap joined onto the outer layer.

Pockets 11 are formed adjacent one another along the length of the belt 1 by joining or stitching the layers 5 and 6 together in vertical fashion and at spaced intervals, as indicated by numeral 12. The upper end of each pocket thus remains open with the flap l0 being adapted to be folded over these ends to overlie the inner layer 5 of the belt for a part of its height. In a pre-v be withdrawn mainly from the wearers body, causing cooling thereof.

Also, gases liberated by sublimation of the dry ice will be directed from the interior of each pocket 11 onto the wearers body, due to the orientation of the flap 10 with respect to the upper, open ends of the pockets. These gases will cause cooling of the wearers body in two ways. Firstly, sensible heating of the gases will result due to .heat transfer between the wearers body and the gases. Secondly, convection of the gases on the skin will result in further cooling in that the gases, being dry, will assist in evaporation of any perspiration produced by the wearer.

Another method of directing the gases liberated onto the wearers body would be to make the inner layer 5 of permeable material to enable the gases to pass therethrough.

As a result of the differences in insulating characteristics of the inner and outer layers, a minimum heat transfer is obtained between environment and the refrigerant and a controlled heat transfer between the wearer and the refrigerant.

It will be appreciated that the straps 4 provide means for regulating the cooling rate of the wearers body. Thus, by loosening the belt, the cooling rate will be lessened dueto the lesser contact of the belt and of the gases with the wearers body. The straps may also be tightened periodically to'compensate for the shrinking of the dry ice due to sublimation.

It is considered that effective cooling of a persons body in the region around his chest will substantially decrease fatigue induced by environmental heat.

A further advantage of the use of expendable refrigerant is a progressive reduction in the load borne by the wearer.

What I claim as new and desire to secure by Letters Patent is:

1. An article adapted to be releasably fixed around a human torso, said article comprising:

an inner layer of heat insulating material covered by an outer layer of heat insulating material, said layers forming pockets for receiving solid, volatile, expendable refrigerant material,

adjustable straps attached to said pockets for fitting the article around a human torso and thereby regulating the cooling effect 'of the article;

and means for directing gases liberated by sublimation of the refrigerant material from within each pocket to the exterior of each pocket on the side of each pocket adapted to face the human torso.

2. An article as claimed in claim 1 in which the layers of insulating material are impervious material.

together at spaced intervals in directions transverse to the said center line.

6. An article as claimed in claim 1 in which each pocket is open at one end thereof with the said means comprising a flap joined to the outer layer and adapted to be folded over the open end of each pocket to overlie the inner layer for a portion of its height.

7. An article as claimed in claim I in which the said means is embodied in the inner layer by virtue of it being permeable.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3074250 *Oct 31, 1960Jan 22, 1963Henry C EverettBody cooler
US3429138 *Apr 27, 1967Feb 25, 1969Isaac GoldmersteinCooling vest
US3452554 *Feb 8, 1968Jul 1, 1969Smith Jessie BCooling garment
US3610323 *Oct 20, 1969Oct 5, 1971Troyer Dan ECool coat
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4253313 *Nov 29, 1978Mar 3, 1981Rowe Alexander WProcedures and apparatus for the conditioning and protection of workmen in hot environments
US4738119 *Feb 9, 1987Apr 19, 1988Westinghouse Electric Corp.Integral cooling garment for protection against heat stress
US4922973 *Nov 17, 1988May 8, 1990Coil Matic, Inc.Collecting vessels for collecting refrigerants from heat exchange systems and methods
US4972832 *Nov 15, 1989Nov 27, 1990Trapini Karen FThermal pack holder
US5038779 *Dec 10, 1990Aug 13, 1991Barry Kevin PTherapeutic garment
US5086629 *Jun 28, 1991Feb 11, 1992Exer Icer Towels, Inc.Scarf for transferring heat from or to body areas of the wearer
US5113666 *Oct 5, 1990May 19, 1992Mainstream Engineering Corp.Cooling device for hazardous materials suits
US5697962 *Sep 29, 1995Dec 16, 1997Dura-Kold CorporationTherapeutic wrap
US5733321 *Apr 17, 1996Mar 31, 1998Dura-Kold CorporationConvertible therapeutic wrap
US5741220 *Apr 17, 1996Apr 21, 1998Dura-Kold CorporationJoint brace assembly and method
US5843145 *Jan 23, 1996Dec 1, 1998Dura-Kold CorporationReusable hot/cold temperature pack
US8434163 *Dec 23, 2010May 7, 2013Carmen L. NudoVest system that provides for a targeted heat/cool therapy treatment
US20110219520 *Jun 1, 2010Sep 15, 2011Roland Edward J"Ice-N-wear" & "heat-N-wear" biker shorts
US20120260409 *Apr 13, 2011Oct 18, 2012David Ben YairHeat protection suit
WO1979000063A1 *Jul 25, 1978Feb 22, 1979Hamersly RContainer for cold subliming solids used in garments
Classifications
U.S. Classification62/259.3, 62/530, 62/384
International ClassificationF25D3/14, A41D13/005
Cooperative ClassificationF25D2400/26, A41D13/0055, F25D3/14
European ClassificationF25D3/14, A41D13/005C2