a glove 10 constructed in accordance with the invention is shown in fig1 and 2 . as used herein , the term &# 34 ; glove &# 34 ; is intended to include mittens as well as gloves with separately formed finger portions . the outermost layer or shell 12 of the glove 10 may be formed in any suitable manner of any suitable material , including leather , vinyl , wool , etc . beneath the shell 12 are layers of glove lining insulation , including a palm piece 14 and a back hand piece 16 . pieces 14 and 16 include finger areas 15 . these pieces may be joined together in any convenient manner , and for simplicity are shown joined together by stitching 21 . the lining insulation may be composed of any comfortable material . beneath the glove lining insulation , on the back hand side , is a layer of innerface lining 20 made of cotton , polyester , or other suitably comfortable , open - weave fabric which freely transmits heated or cooled air ( hereinafter referred to as &# 34 ; non - insulating material &# 34 ;). the innerface lining 20 is attached by stitching 21 or with an adhesive to pieces 14 and 16 . a gap 19 is provided between back hand piece 16 and innerface lining 20 for insertion of the wearer &# 39 ; s hand . a pocket 22 is formed beneath innerface lining 20 and is preferably located in the wrist area of the glove . the pocket is formed from pocket pieces 24 and 26 , which are attached together at the top and sides of the pocket as by stitching 28 . the pocket pieces should be composed of a non - insulating material . a bladder 30 is positioned between pocket piece 26 and palm piece 14 , and it is desirably bonded , as with an adhesive , to the palm piece 14 . the bladder is a seamless , fluid - retaining sack preferably formed with a dipped process well known in the art and composed of latex , neoprene , polyurethane , vinyl , or a similar elastic , water - tight material . preferably , the bladder material is between two and four millimeters in thickness , so that it will not easily rupture and yet still conduct heat . the bladder 30 overlays substantially all of pocket piece 26 on one side , and on the other side extends parallel to the wearer &# 39 ; s palm and to finger areas 15 , running substantially the entire length of the fingers toward the fingertips 18 of the glove . preferably , bladder 30 corresponds in shape to pieces 14 and 16 and is shaped generally like a rubber glove . inside the bladder is a liquid heat transfer medium having a freezing point substantially below 32 ° f . two liquids found suitable are salt water and silicone fluid , such as dow type 200 fluid / 50 centistoke . the typical adult - size glove will desirably contain between 3 and 4 ounces of the liquid , with a commensurately smaller amount for a child &# 39 ; s size glove . the bladder is preferably filled with less than the maximum volume it hold so that the liquid volume can be shifted in accordance with the wearer &# 39 ; s hand movements , as described subsequently . bladder 30 is filled through , and then sealed at its base 31 , desirably by a double heat seal 32 or a mechanical closure such as a string , rubber tie , or plastic crimp ( not shown ). the liquid 34 in bladder 30 is to be heated or cooled , depending on the glove - wearer &# 39 ; s preference , by a temperature controlling device such as an exothermic or endothermic chemical pack 36 . the pack is inserted in pocket 22 as needed by the wearer . one type of suitable exothermic pack is sold by the heat factory , inc . of mission viejo , calif . under the trademark heat factory . it generally provides 6 to 12 hours of heat energy , depending upon the ambient temperature , and is disposable . similar types of disposable chemical cooling packs are commercially available . upon squeezing the packs , the chemicals are mixed to create an endothermic or exothermic reaction , which can be detected outside the pack . an alternate embodiment of the invention is shown in fig3 - 5 . this embodiment discloses a lining system for insertion into an existing lined glove shell . the glove shell itself is not shown in these figures . in this embodiment , a foam back hand lining 50 is affixed to a back hand innerface lining 52 and to a palm side innerface lining 54 . the innerface linings are composed of a non - insulating material , and pieces 50 , 52 , and 54 are joined as by stitching 55 . a gap 58 for the insertion of the wearer &# 39 ; s fingers is formed between lining pieces 52 and 54 . a pocket 60 open at the bottom is formed by palm side innerface lining 54 and pocket piece 62 , which are stitched together as at 63 . the pocket piece is also non - insulating . adjacent to the pocket 60 and extending up along the palm side innerface lining 54 substantially all the way to finger - tip area 56 is a bladder 64 constructed as described previously . the bladder contains the same type of liquid 66 as described previously . the bladder 64 is bonded to pocket piece 62 and to innerface lining piece 65 with an adhesive , and the bladder is sealed at its bottom by a double heat seal 70 or with a mechanical closure ( not shown ) as described for the first embodiment . a temperature control device 68 , either exothermic or endothermic , of the same types described previously , can be inserted into pocket 60 . the entire unit comprising the bladder 64 , innerface lining pieces 52 and 54 , foam back hand lining 50 , and temperature control device 68 can be inserted into an existing lined glove shell . in operation , the invention is simple and efficient to use . the wearer inserts a temperature control device into the pocket , either before or after putting the glove on . exposure of the temperature control device to the air or manipulation of the wearer &# 39 ; s fingers and hand triggers the chemical reaction in the temperature control device . the heat or cold produced by the temperature control device passes through the pocket and into the liquid in the adjoining portion of the bladder . the liquid is then heated or cooled . gravity and normal hand movements of the wearer circulates the heated or cooled liquid . as the liquid circulates , the warmed or cooled liquid moves from the palm area to the fingertip areas , concurrently transmitting the liquid temperature to the adjacent hand or finger tissue and warming or cooling it . when the wearer &# 39 ; s hand is clasped around a tool or ski pole handle , for example , the liquid in the bladder is forced from the finger areas and circulates back to the palm area of the bladder adjacent to the temperature control device . the free - flow characteristic of the liquid heat transfer medium provides comfort and does not appreciably restrict the dexterity and mobility of the user &# 39 ; s hand , since the liquid can freely circulate within the bladder to an area remote from the fingers , such as the wrist area , when finger dexterity is needed by the wearer . the free flowing liquid also tends to massage the adjacent hand tissue , which improves blood circulation and further heats the hand tissue . the invention as described above includes a bladder positioned on the palm side of a glove , but the bladder and temperature control device could also be positioned on the back hand side of the glove by simply constructing a pocket on that side . those who are skilled in the art will readily perceive other ways to modify the invention . therefore , the appended claims are to be construed to cover all equivalent structures which fall within the true scope and spirit of the invention .
a glove or glove lining includes a bladder partially filled with a heat - transferring liquid . the bladder is contained within the glove shell and may be bonded to the glove lining . a pocket within the glove and preferably in the wrist area of glove contains an exothermic or endothermic chemical pack . the pocket and chemical pack are sufficiently close to the bladder to heat or cool the liquid in it . the heated or cool liquid is circulated from the wrist area to the fingertips area of the glove by gravity and by natural hand motions of the wearer &# 39 ; s hand . this transfers the heat or coolness of the liquid through the bladder ultimately to the adjoining tissue of the hand .