CA1151418A - Portable heater for generating and circulating heat in wearing apparel - Google Patents
Portable heater for generating and circulating heat in wearing apparelInfo
- Publication number
- CA1151418A CA1151418A CA000375922A CA375922A CA1151418A CA 1151418 A CA1151418 A CA 1151418A CA 000375922 A CA000375922 A CA 000375922A CA 375922 A CA375922 A CA 375922A CA 1151418 A CA1151418 A CA 1151418A
- Authority
- CA
- Canada
- Prior art keywords
- chemical
- heat
- container
- conduit
- cartridge
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/02—Footwear with health or hygienic arrangements with heating arrangements
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Gloves (AREA)
- Feeding And Controlling Fuel (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A portable heater for generating and circulating heat in wearing apparel. The heater consists of a compact insulated case having a cavity therein which is adapted to receive a chemical heat cartridge which gives off heat through an exothermic chemical reaction reaction when an activator or catalyst is added to the chemical content of the cartridge.
A liquid reservoir is positioned in the case for radiant heat transfer from the chemical heat cartridge. A flexible liquid conduit has opposite ends thereof connected for circulation of the heated liquid from the reservoir in a closed circuit, and a pump is provided for circulating the heated liquid through the conduit on demand.
1.
A portable heater for generating and circulating heat in wearing apparel. The heater consists of a compact insulated case having a cavity therein which is adapted to receive a chemical heat cartridge which gives off heat through an exothermic chemical reaction reaction when an activator or catalyst is added to the chemical content of the cartridge.
A liquid reservoir is positioned in the case for radiant heat transfer from the chemical heat cartridge. A flexible liquid conduit has opposite ends thereof connected for circulation of the heated liquid from the reservoir in a closed circuit, and a pump is provided for circulating the heated liquid through the conduit on demand.
1.
Description
The ~resent inven~ion relates -to porta},le furnaces ancl more particularly to compact furnaces or warmers to be carried on the nerson for circulatiny heat in wearing apparel such as gloves or hoots.
Boot warmers wherein a hot li~.Iuid is circulatecl within a boot have been known in the pcast, for example~
as illustrated in U.S. Patent i~o. 518,579 issued to Annenberc3 et al and in U.S. Patent .No~ 15199,914 issued to ~Iossor. However, such boot warmers provide no compact means for heatin~ the fluid and further require a rather awkward operation in getting the heated flu.id into the boot cavities.
U.S. Patent NO. 912,527 issued to Batter on Eehruary 16, 1909 cliscloses a portahle boo-t and bod~ warmer wherein a heater unit of relatively large size is attached to the individual's belt ancl fluid conduit tt~es pass from the inclividual~s belt dn~m his le~s and into his shoes or boots~ ~Iand manlpulated ~umps are ~rov.icled at khe knee level to pump or circulate the iluid throuahout the conduits.
~owever, such an apparatus is extremely cumbersorne and it is also relatively im~ractical in th.is clay and acle, ancl it is rather obvious that hunters and ou-t-..lo~r workers would not tolerate such a large amount o:E parapherIlalia and tubes running down the legs and about the waist.
:Liciuid heater tmits for ~ody ~^~arming purposes wIIich are much more compact than -that illustrated in I-3atter Paten~ No. 912,527 have been develol~ed as ma~ .be seen in U.S. Patent ~o. 3~737,620~ However, this compact heater unit, while beirlg ] ight weight an(l apparentl~ ver~ ef- Eective, is relatively complex and requires the use of nuclear fusion~
The expense of such a device would clearly ~e heyond -the reach of the average hunter or outcloor wor} er~ In addition, this xeference and the a forementioned references c~o no-t teach how any of the devices disclosed could l~e more conveniently and economically and compactly utili zed as a boot or glove warme r .
A major disadvantage of the economical neating units of the prior art which are utili~ecl to circulate a heated liquid througll weari n~ apparel is that these heating units must he used substantially in an uprlcJht position and will no~ eEfectively operate at any or all attitudes.
In addition, the liquid furnaces of the prior art are, by necessi~y, too large in size and are cumbersom2.
~e have discovere~ that our boot warmer as disclosed in U. S . Patent No. 4 ,180, 9 22 is extremely effective. However~ there are certain conditions ~mder which this boot warmer cannot be utiliæed when solid fuel agglomerates are used in the furnace. For example, Imder some working conc1itions, as wllere exploc.ive ~lases or clusts might be present, an open flarne canllot be utili2erl. ~.lso, in many working conditions I such as in -the military and in many other outdoor occupations, there are times when an entire boot or glove or other wearing apparel ma~r hecome completely subrrerged in water whicn would extinguish an ignited soli~l fuel agglomcrate.
~ prirlcipal ohjec~ of the present invention is to eliminate these aforementiorled clisadvantages of the ~rior art and to provide a compact heatin~ s~stem for wearinq apparel ~hich is much more convenient and less e~PenSiVe than the devices of the prior art~
The portable heater of the presf~nt invention for generatin~ and circulatina heat in wearin~ apparel such as ~loves ox boots or the like comprises a com~act insulate~
case capable of ~eing carrie~ on one's person and having a cavity therein ~hich is adapted to receive a chemical heat cartridge. The chemical heat cartridge is removably received in the cavity and the case is also prov.ided with a liquid r2servoir posi~ioned for rad.iant heat trans.~er from the chemical heat cartridge through an inside heat exchange wall of the case. A flexlble li~uid conduit is provided which has both ends thereof connected ~or circulation of the heated li~uid from saia reservoir through the concluit in a closed circuit, and a pump is provi~ed and connected to the conduit -to circulate heatecl liquid from the reservoir through the conduit on demand.
The chemical heat cartridge consists of a sealecl container which contains a chemic.ll compos.itic)rl which reacts with an activatin~ chemical when mixecl therewith to provide an exothermic chemical reactionf ~n a(-,cess is provided on the container with a closure which is replaceabl.y removable to provide access to the interior of the container Ec.~r the insertion of a predetermi.ned c~uantit~ of activatin~ chemical to initiate the exothermic reactionO
In one version of the chcmical heat cartridge, a tube cxtends inside the container from the acess and is provided with a series of apertures therein to assist in distribution of an activating chemical when inserted into -the access in order to more uniformly distribute the catalyst or activating chemical with the chemical composition contained in the container. rrhe cartridge may also be provided with a pressure release check valve to vent gas under pressure which may build up within the container as a result of the reaction of the activating chemical with the chemical composition contained within the container or heat cartridge.
~ lore particularly, the present invention relates to a portable heater for generating and circulating heat in wearing apparel or the like comprising a,compact case capable of being carried on a person and having a cavity therein adapted to receive a chemical heat cartridge, a chemical heat cartridge removably received in said cavity,~
a liquid reservoir in said case positioned for radiant heat transfer from said chemical heat cartridge through an inside heat exchanger wall of said case, a flexible liquid conduit having both ends thereof connected for circula-tion of the heated liquid from said reservoir through said conduit in a closed circuit, and pump means connected to said conduit to circulate heated liquid from said reser-voir through said conduit on demand, said chemical heat cartridge consisting of a sealed container con-taining a chemical composition which reacts with an ac-tivati.ng chemical when mixed therewith to provic3e an exothermic chemical re.lction, and an access on said contailler and having a cl,osure which is removable to provide access to the int,,erior of said container for the insertion of an activating chemical.
~l~ r..,:3l4tl 18 The following description and the accompanying drawings will serve as an illustration but not as a limitation of this invention, Fig. 1 is all isometric view i.n side el~vation of the portable chemical heater of the preserlt inventior.
as utilized in a conventional boot.
Fig~ 2 is an enlarged isometric view of the heatex and pump unit of the present invention ~ith the cover of the heater case opened to expose the chemical heat cartridge which is shown as being paxtiall~ received ~7ithin the cavity of the case, ~ith portions further removed to expose the interior of the li~uid reservoir~
Fig. 3 i.s a side view in mid-cross section of the heater unit illustrated in Fig. 2 with the cover closed and the chemical heat cartridge fully inserted wi,hin the cavity of the case.
Fig. 4 is an isometric view of the chemical heat cartrid~e contained within the heater illustrated in Figs.
Boot warmers wherein a hot li~.Iuid is circulatecl within a boot have been known in the pcast, for example~
as illustrated in U.S. Patent i~o. 518,579 issued to Annenberc3 et al and in U.S. Patent .No~ 15199,914 issued to ~Iossor. However, such boot warmers provide no compact means for heatin~ the fluid and further require a rather awkward operation in getting the heated flu.id into the boot cavities.
U.S. Patent NO. 912,527 issued to Batter on Eehruary 16, 1909 cliscloses a portahle boo-t and bod~ warmer wherein a heater unit of relatively large size is attached to the individual's belt ancl fluid conduit tt~es pass from the inclividual~s belt dn~m his le~s and into his shoes or boots~ ~Iand manlpulated ~umps are ~rov.icled at khe knee level to pump or circulate the iluid throuahout the conduits.
~owever, such an apparatus is extremely cumbersorne and it is also relatively im~ractical in th.is clay and acle, ancl it is rather obvious that hunters and ou-t-..lo~r workers would not tolerate such a large amount o:E parapherIlalia and tubes running down the legs and about the waist.
:Liciuid heater tmits for ~ody ~^~arming purposes wIIich are much more compact than -that illustrated in I-3atter Paten~ No. 912,527 have been develol~ed as ma~ .be seen in U.S. Patent ~o. 3~737,620~ However, this compact heater unit, while beirlg ] ight weight an(l apparentl~ ver~ ef- Eective, is relatively complex and requires the use of nuclear fusion~
The expense of such a device would clearly ~e heyond -the reach of the average hunter or outcloor wor} er~ In addition, this xeference and the a forementioned references c~o no-t teach how any of the devices disclosed could l~e more conveniently and economically and compactly utili zed as a boot or glove warme r .
A major disadvantage of the economical neating units of the prior art which are utili~ecl to circulate a heated liquid througll weari n~ apparel is that these heating units must he used substantially in an uprlcJht position and will no~ eEfectively operate at any or all attitudes.
In addition, the liquid furnaces of the prior art are, by necessi~y, too large in size and are cumbersom2.
~e have discovere~ that our boot warmer as disclosed in U. S . Patent No. 4 ,180, 9 22 is extremely effective. However~ there are certain conditions ~mder which this boot warmer cannot be utiliæed when solid fuel agglomerates are used in the furnace. For example, Imder some working conc1itions, as wllere exploc.ive ~lases or clusts might be present, an open flarne canllot be utili2erl. ~.lso, in many working conditions I such as in -the military and in many other outdoor occupations, there are times when an entire boot or glove or other wearing apparel ma~r hecome completely subrrerged in water whicn would extinguish an ignited soli~l fuel agglomcrate.
~ prirlcipal ohjec~ of the present invention is to eliminate these aforementiorled clisadvantages of the ~rior art and to provide a compact heatin~ s~stem for wearinq apparel ~hich is much more convenient and less e~PenSiVe than the devices of the prior art~
The portable heater of the presf~nt invention for generatin~ and circulatina heat in wearin~ apparel such as ~loves ox boots or the like comprises a com~act insulate~
case capable of ~eing carrie~ on one's person and having a cavity therein ~hich is adapted to receive a chemical heat cartridge. The chemical heat cartridge is removably received in the cavity and the case is also prov.ided with a liquid r2servoir posi~ioned for rad.iant heat trans.~er from the chemical heat cartridge through an inside heat exchange wall of the case. A flexlble li~uid conduit is provided which has both ends thereof connected ~or circulation of the heated li~uid from saia reservoir through the concluit in a closed circuit, and a pump is provi~ed and connected to the conduit -to circulate heatecl liquid from the reservoir through the conduit on demand.
The chemical heat cartridge consists of a sealecl container which contains a chemic.ll compos.itic)rl which reacts with an activatin~ chemical when mixecl therewith to provide an exothermic chemical reactionf ~n a(-,cess is provided on the container with a closure which is replaceabl.y removable to provide access to the interior of the container Ec.~r the insertion of a predetermi.ned c~uantit~ of activatin~ chemical to initiate the exothermic reactionO
In one version of the chcmical heat cartridge, a tube cxtends inside the container from the acess and is provided with a series of apertures therein to assist in distribution of an activating chemical when inserted into -the access in order to more uniformly distribute the catalyst or activating chemical with the chemical composition contained in the container. rrhe cartridge may also be provided with a pressure release check valve to vent gas under pressure which may build up within the container as a result of the reaction of the activating chemical with the chemical composition contained within the container or heat cartridge.
~ lore particularly, the present invention relates to a portable heater for generating and circulating heat in wearing apparel or the like comprising a,compact case capable of being carried on a person and having a cavity therein adapted to receive a chemical heat cartridge, a chemical heat cartridge removably received in said cavity,~
a liquid reservoir in said case positioned for radiant heat transfer from said chemical heat cartridge through an inside heat exchanger wall of said case, a flexible liquid conduit having both ends thereof connected for circula-tion of the heated liquid from said reservoir through said conduit in a closed circuit, and pump means connected to said conduit to circulate heated liquid from said reser-voir through said conduit on demand, said chemical heat cartridge consisting of a sealed container con-taining a chemical composition which reacts with an ac-tivati.ng chemical when mixed therewith to provic3e an exothermic chemical re.lction, and an access on said contailler and having a cl,osure which is removable to provide access to the int,,erior of said container for the insertion of an activating chemical.
~l~ r..,:3l4tl 18 The following description and the accompanying drawings will serve as an illustration but not as a limitation of this invention, Fig. 1 is all isometric view i.n side el~vation of the portable chemical heater of the preserlt inventior.
as utilized in a conventional boot.
Fig~ 2 is an enlarged isometric view of the heatex and pump unit of the present invention ~ith the cover of the heater case opened to expose the chemical heat cartridge which is shown as being paxtiall~ received ~7ithin the cavity of the case, ~ith portions further removed to expose the interior of the li~uid reservoir~
Fig. 3 i.s a side view in mid-cross section of the heater unit illustrated in Fig. 2 with the cover closed and the chemical heat cartridge fully inserted wi,hin the cavity of the case.
Fig. 4 is an isometric view of the chemical heat cartrid~e contained within the heater illustrated in Figs.
2 and 3, witll port.ions -thereof removecl to expose the interior of the ~artridge.
Fig. 5 is an isometric v.iew of a felt hoot liner in section with the por-table chemical heater and pump assembly of the present invention installed on the top thereof.
rig. ~ is a viet7 in .Eront elevation of a plastic capsule containing a predetermined quantit.y of an activating chemical or catalyst to be inserted in the chemical heat cartridge illustrated in Fiq~ ~ to initiate the exothermic chemical reaction therein.
.a~s Referrl.ng to Fig. l, the weaxing apparel heater or warn~r and boot combination 10 of -the present inveYltJon includes a portahle compact heater ~nit or heat exchanger 11 having a liqui~ conduit 12 circulating -throughout and ~ithin boot 13 in order to circu].ate heated liquid from the heat exchanger unit 11. IIeated liquid is pumped from u~it 11 through conduit 12 by means of hand manipulated pump l~o Referring particularly to E'igs. 2, 3 and 4, heater unit 11 is relatively compact and includes a compact case 15 haviny a cover 16 which is hinged at 17 to the remainder of case 15 and opens as indicat~d in Fi~. 2 to provide cavity 13 therein to receive chemical heat cartridge 19 therein for giving off heat through a chemical exothermic reaction within cartridqe 19. Cover 16 may be securecl in its closed position by means of spring clip ~0 ~lhich rides over and receives projection 21 within slot 22.
The bottom or back wall 3.5 of cavity 18 is a metal wall which is a good heat conductor and acts as an inside heat exchanger wall to transfer radiant heat from chemical heat cartridge 19 into the liquid 26 contai.ned within the liyuid reservoir 25 in order to heat th~ liquid 26. Case 15 is also insulatecl as :indicated at 23 in order to prevent heat loss from cartriclge 19 through the lid 16.
The entire case 15~ with the exception of insulation 23 contained tihereirl, is manufactured of a suitable metal such as chrome-plated steel~ ~s best illustrated in Fig. 1, a filler spout ~.~ is provided at the -top of the case lS and provides access to liqui~ reservoir 25 ~1~1418 for initially filling the reservoir with a suitable heat transfer liquid such as anti-freeze, or a combination of water and anti-freeze. Filler opening 28 is provided with a suitable plug.
Reservoir 25 is provided with an outlet 29 and an inlet 30. Hand pump 14 is secured to the bottom of case 15 by means of the outlet tube 29 which communicates with the interior of reservoir 25. Hand pump 14 is a conventional double check valve pump having a flexible diaphragm 31 which is pumped or depressed by one's finger against the resistance of return coil spring 32 to pump liquid through pump 14 as indicated by arrows 33.
The inlet of pump 14 is indicated at 34 and conduit 12 is connected at one end to inlet 34 with a force fit and at the other end with a force fit over hot liquid discharge or outlet 29.
The entire heater unit 11 with pump 14 which is secured thereto are attached to the boot top as indicated in Fig. 4 by any conventional means such as a pocket or an adhesive. In Fig. 1, the entire unit is attached with an adhesive and the connection o~ conduit 12 to the unit also assists in holding it in position.
The chemical heat cartridge 19 is preferahly made of a good heat conducting metal and is basically a sealed container containing a chemical composition 24 which reacts with an activating chemical when mixed therewith to provide an exothermic chemical reaction. There are many such chemicals on the market and by way of example, one may utilize the chemicals as disclosed in Rosmarin United States Patent No. 2,675,79B, Col. 3. Generally, this chemical 24 is activated by an activating chemical or catalyst such as water or alcohol or a combination thereof. Predetermined quantities of the activating chemical or catalyst are contained within the capsule illustrated in Fig. 6.
Plastic capsule 35 has a nipple 36 at the bottom thereof which is cut with a scissors or the like so that the catalyst or chemical activator contained within capsule 35 may be squeezed out through the nipple 36 and thereby mixed with chemical 24 contai~ed in chemical heat cartridge 19.
An access 37 is provided on cartridge or container 19 in order to insert the catalyst from capsule 35 into the interior of container 19 thereb~ mixing the catalyst with chemical composition 24 to create or initiate the exothermic reaction. Access 37 is provided with a replaceable removable closure or cap 38 which is threadably receivable on access 37.
A tube 39 extends inside container 19 from access 37 and is provided further with a series of apertures 40 to assist in distribution of the activating chemical when inserted into the access so that it is more uniformly mixed with the chemical composition 24 for reaction. Container 19 is further provided with a spring loaded pressure release check valve 41 in order to vent gas pressure built up within container 19 which may result from reaction of the activating chemical within capsule 35 with the chemical composition 24.
In order to o~erate the portable hea,er of the present invention, anti~Eree~e or other suita~e liqruid is poured into the sys-tem of .reservoir 2S and the son~'uit 12 by means of filler opening 28. I~ile ~oing this, pumlr 14 is manipulake~ to fully circulate the liauid he~ ng r,oured into the system throughou~ the conduit and to purge air from the system back out through filler inlet 28. Once the system is filled~ chemical cartridge 19 i.s inserted into cavity 18 with access 37 and vents 41 exposed at the ~op thereof and closure 38 is then removed and the activating chemical from capsule 35 is squeezed i.nto access 37 and thereby thoroughly mixed with chemical composition 24 as the liquid activator penetrates through openings 40 of tuhe 39.
Closure 38 is replaced over access 37 and the chemical action begins within container 19 in the form of an exothermic reaction thereby heating up container 19 which in turn heats heat exchanger wall 35 which in turn heats the liquid contained within rese.rvoir 25. ~Ihen the wea}^er then wants to haat his hoots or gloves, as the case may be, he can manipulate pump 14 every 15 minutes to half-an-hour, or as desired, to circulate heated li~uid in reservoir 25 throllc3h conduit 12 thereby warming the i.nterior of the wearinq apparel.
Capsule 35 as illustrated in Fig. ~ con-tains a predetermined quantity o F the catalyst or activatinq chem.ical which is of an insufficient amount to completely react with all of the chemical 24 contained ~ithin container 19.
Thusl the user may periodicall.y reactivate the exothermic reaction within container 19 by adding new premeasured quantities of activa~ing chemical to the interior of container 19 as required until the entire chemical ~5i1418 composition 24 has been completely reacted with by the activating chemical. Once the chemical 24 within container 19 has been completely expended, the entire chemical heat cartridge 19 may then be discarded and a new cartridge inserted into unit 11.
The entire unit and comhination boot and heater unit are very compact, and the portable heater of the present invention does not interfere with the normal activity of the boot wearer or glove wearer and requires no tubes or anything else attached elsewhere on the person of the wearer.
As illustrated in Fig. 5, the portable heater of the present invention may be provided in combination with a boot liner 40 with conduit 12' circulating throughout the boot liner 40. Felt boot liner 40 is of the conventional type which is inserted within a water-impervious boot casing such as illustrated at 13 in Fig. 1. Thus, the felt liner and portable heater combination may be sold as a separate unit and inserted into a wearer's existing boot casing.
The conduit 12' exits from the top of boot liner 40 so that the boot liner may be conveniently inserted within a boot casing and then the heater unit 11 hangs over top of the outside boot casing and may be secured thereto by a pocket on the outside of the boot casing or any other conventional securing means such as an adhesive or an expansion strap or belt strap. In either situation, the heater unit 11 is exposed such that pump 14 is exposed for easy access and manipulation as required.
11 .
~S~418 In order to fill the system illustrated in Fig. S with the heat transfer liquid, one need only remove conduit 12' from heater outlet 29 or inlet 34 and fill the device through the opening, or a separate filler opening may be provided, as is the case with the unit illustrated in Fig. l.
12.
Fig. 5 is an isometric v.iew of a felt hoot liner in section with the por-table chemical heater and pump assembly of the present invention installed on the top thereof.
rig. ~ is a viet7 in .Eront elevation of a plastic capsule containing a predetermined quantit.y of an activating chemical or catalyst to be inserted in the chemical heat cartridge illustrated in Fiq~ ~ to initiate the exothermic chemical reaction therein.
.a~s Referrl.ng to Fig. l, the weaxing apparel heater or warn~r and boot combination 10 of -the present inveYltJon includes a portahle compact heater ~nit or heat exchanger 11 having a liqui~ conduit 12 circulating -throughout and ~ithin boot 13 in order to circu].ate heated liquid from the heat exchanger unit 11. IIeated liquid is pumped from u~it 11 through conduit 12 by means of hand manipulated pump l~o Referring particularly to E'igs. 2, 3 and 4, heater unit 11 is relatively compact and includes a compact case 15 haviny a cover 16 which is hinged at 17 to the remainder of case 15 and opens as indicat~d in Fi~. 2 to provide cavity 13 therein to receive chemical heat cartridge 19 therein for giving off heat through a chemical exothermic reaction within cartridqe 19. Cover 16 may be securecl in its closed position by means of spring clip ~0 ~lhich rides over and receives projection 21 within slot 22.
The bottom or back wall 3.5 of cavity 18 is a metal wall which is a good heat conductor and acts as an inside heat exchanger wall to transfer radiant heat from chemical heat cartridge 19 into the liquid 26 contai.ned within the liyuid reservoir 25 in order to heat th~ liquid 26. Case 15 is also insulatecl as :indicated at 23 in order to prevent heat loss from cartriclge 19 through the lid 16.
The entire case 15~ with the exception of insulation 23 contained tihereirl, is manufactured of a suitable metal such as chrome-plated steel~ ~s best illustrated in Fig. 1, a filler spout ~.~ is provided at the -top of the case lS and provides access to liqui~ reservoir 25 ~1~1418 for initially filling the reservoir with a suitable heat transfer liquid such as anti-freeze, or a combination of water and anti-freeze. Filler opening 28 is provided with a suitable plug.
Reservoir 25 is provided with an outlet 29 and an inlet 30. Hand pump 14 is secured to the bottom of case 15 by means of the outlet tube 29 which communicates with the interior of reservoir 25. Hand pump 14 is a conventional double check valve pump having a flexible diaphragm 31 which is pumped or depressed by one's finger against the resistance of return coil spring 32 to pump liquid through pump 14 as indicated by arrows 33.
The inlet of pump 14 is indicated at 34 and conduit 12 is connected at one end to inlet 34 with a force fit and at the other end with a force fit over hot liquid discharge or outlet 29.
The entire heater unit 11 with pump 14 which is secured thereto are attached to the boot top as indicated in Fig. 4 by any conventional means such as a pocket or an adhesive. In Fig. 1, the entire unit is attached with an adhesive and the connection o~ conduit 12 to the unit also assists in holding it in position.
The chemical heat cartridge 19 is preferahly made of a good heat conducting metal and is basically a sealed container containing a chemical composition 24 which reacts with an activating chemical when mixed therewith to provide an exothermic chemical reaction. There are many such chemicals on the market and by way of example, one may utilize the chemicals as disclosed in Rosmarin United States Patent No. 2,675,79B, Col. 3. Generally, this chemical 24 is activated by an activating chemical or catalyst such as water or alcohol or a combination thereof. Predetermined quantities of the activating chemical or catalyst are contained within the capsule illustrated in Fig. 6.
Plastic capsule 35 has a nipple 36 at the bottom thereof which is cut with a scissors or the like so that the catalyst or chemical activator contained within capsule 35 may be squeezed out through the nipple 36 and thereby mixed with chemical 24 contai~ed in chemical heat cartridge 19.
An access 37 is provided on cartridge or container 19 in order to insert the catalyst from capsule 35 into the interior of container 19 thereb~ mixing the catalyst with chemical composition 24 to create or initiate the exothermic reaction. Access 37 is provided with a replaceable removable closure or cap 38 which is threadably receivable on access 37.
A tube 39 extends inside container 19 from access 37 and is provided further with a series of apertures 40 to assist in distribution of the activating chemical when inserted into the access so that it is more uniformly mixed with the chemical composition 24 for reaction. Container 19 is further provided with a spring loaded pressure release check valve 41 in order to vent gas pressure built up within container 19 which may result from reaction of the activating chemical within capsule 35 with the chemical composition 24.
In order to o~erate the portable hea,er of the present invention, anti~Eree~e or other suita~e liqruid is poured into the sys-tem of .reservoir 2S and the son~'uit 12 by means of filler opening 28. I~ile ~oing this, pumlr 14 is manipulake~ to fully circulate the liauid he~ ng r,oured into the system throughou~ the conduit and to purge air from the system back out through filler inlet 28. Once the system is filled~ chemical cartridge 19 i.s inserted into cavity 18 with access 37 and vents 41 exposed at the ~op thereof and closure 38 is then removed and the activating chemical from capsule 35 is squeezed i.nto access 37 and thereby thoroughly mixed with chemical composition 24 as the liquid activator penetrates through openings 40 of tuhe 39.
Closure 38 is replaced over access 37 and the chemical action begins within container 19 in the form of an exothermic reaction thereby heating up container 19 which in turn heats heat exchanger wall 35 which in turn heats the liquid contained within rese.rvoir 25. ~Ihen the wea}^er then wants to haat his hoots or gloves, as the case may be, he can manipulate pump 14 every 15 minutes to half-an-hour, or as desired, to circulate heated li~uid in reservoir 25 throllc3h conduit 12 thereby warming the i.nterior of the wearinq apparel.
Capsule 35 as illustrated in Fig. ~ con-tains a predetermined quantity o F the catalyst or activatinq chem.ical which is of an insufficient amount to completely react with all of the chemical 24 contained ~ithin container 19.
Thusl the user may periodicall.y reactivate the exothermic reaction within container 19 by adding new premeasured quantities of activa~ing chemical to the interior of container 19 as required until the entire chemical ~5i1418 composition 24 has been completely reacted with by the activating chemical. Once the chemical 24 within container 19 has been completely expended, the entire chemical heat cartridge 19 may then be discarded and a new cartridge inserted into unit 11.
The entire unit and comhination boot and heater unit are very compact, and the portable heater of the present invention does not interfere with the normal activity of the boot wearer or glove wearer and requires no tubes or anything else attached elsewhere on the person of the wearer.
As illustrated in Fig. 5, the portable heater of the present invention may be provided in combination with a boot liner 40 with conduit 12' circulating throughout the boot liner 40. Felt boot liner 40 is of the conventional type which is inserted within a water-impervious boot casing such as illustrated at 13 in Fig. 1. Thus, the felt liner and portable heater combination may be sold as a separate unit and inserted into a wearer's existing boot casing.
The conduit 12' exits from the top of boot liner 40 so that the boot liner may be conveniently inserted within a boot casing and then the heater unit 11 hangs over top of the outside boot casing and may be secured thereto by a pocket on the outside of the boot casing or any other conventional securing means such as an adhesive or an expansion strap or belt strap. In either situation, the heater unit 11 is exposed such that pump 14 is exposed for easy access and manipulation as required.
11 .
~S~418 In order to fill the system illustrated in Fig. S with the heat transfer liquid, one need only remove conduit 12' from heater outlet 29 or inlet 34 and fill the device through the opening, or a separate filler opening may be provided, as is the case with the unit illustrated in Fig. l.
12.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A portable heater for generating and circulating heat in wearing apparel or the like comprising a compact case capable of being carried on a person and having a cavity therein adapted to receive a chemical heat cartridge, a chemical heat cartridge removably received in said cavity, a liquid reservoir in said case positioned for radiant heat transfer from said chemical heat cartridge through an inside heat exchanger wall of said case, a flexible liquid conduit having both ends thereof connected for circulation of the heated liquid from said reservoir through said conduit in a closed circuit, and pump means connected to said conduit to circulate heated liquid from said reservoir through said conduit on demand, said chemical heat cartridge consisting of a sealed container containing a chemical composition which reacts with an activating chemical when mixed there-with to provide an exothermic chemical reaction, and an access on said container and having a closure which is removable to provide access to the interior of said container for the insertion of an activating chemical.
2. The portable heater of claim 2 including a tube extending inside said container from said access and having apertures therein to assist in distribution of an activating chemical inserted into said access with said chemical com-position for reaction.
3. The portable heater of claim 2 including a pressure relief check valve in said container to vent gas pressure buildup within said container resulting from reaction of said activating chemical with said chemical composition.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/186,954 US4334519A (en) | 1979-06-18 | 1980-09-15 | Portable heater for generating and circulating heat in wearing apparel |
| US186,954 | 1980-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151418A true CA1151418A (en) | 1983-08-09 |
Family
ID=22686987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000375922A Expired CA1151418A (en) | 1980-09-15 | 1981-04-22 | Portable heater for generating and circulating heat in wearing apparel |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR840001894B1 (en) |
| CA (1) | CA1151418A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101403604B1 (en) * | 2013-09-13 | 2014-06-03 | 권순범 | Hands or feet wear for keeping warm and cold insulation |
-
1981
- 1981-04-22 CA CA000375922A patent/CA1151418A/en not_active Expired
- 1981-05-07 KR KR1019810001576A patent/KR840001894B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| KR830005671A (en) | 1983-09-09 |
| KR840001894B1 (en) | 1984-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |