NNT or cold pad with inner element
DC
First Claim
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1. A heating or cooling pad comprising:
- A) an outer, flexible, sealed, envelope containing a high thermal capacity first material, said envelope being impervious to said first material;
B) at least one inner pouch also contained within said envelope, said pouch comprising a high thermal capacity second material sealed within an enclosing web that is impervious to said second material, so that said first and second materials cannot mix;
C) means associated with said outer envelope and inner pouch for retaining said inner pouch in position relative to said outer envelope.
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Abstract
A flexible heat transfer device for heating or cooling a surface such as the skin has an envelope formed from two sheets. The envelope contains a high thermal capacity first material such as a freezing gel that is flexible when frozen for good surface contact, A pouch within the envelope contains a high thermal capacity second material that may have different physical properties than the first material. The pouch may be segmented, or there may be multiple pouches. The device is more versatile in its applications and provides for more prolonged heating and cooling, The pouch may be in two parts within a frangible partition that generates heat or cold when the partition is ruptured and the two parts mixed.
98 Citations
20 Claims
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1. A heating or cooling pad comprising:
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A) an outer, flexible, sealed, envelope containing a high thermal capacity first material, said envelope being impervious to said first material; B) at least one inner pouch also contained within said envelope, said pouch comprising a high thermal capacity second material sealed within an enclosing web that is impervious to said second material, so that said first and second materials cannot mix; C) means associated with said outer envelope and inner pouch for retaining said inner pouch in position relative to said outer envelope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A heat transfer device for heating and cooling a surface, the device comprising:
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an envelope formed of first and second sheets, the sheet having broad faces; each sheet formed of an outer panel of flexible, liquid-impermeable webbing, the panels joined together on all edges to define therebetween a volume that contains a high thermal capacity first material; and the volume further containing therein at least one pouch sealingly enclosing a space, the space containing therein a high thermal capacity second material, the pouch being formed of web that is impermeable to said first and second material so that said first and second materials cannot mix; means connecting said pouch to said envelope so that said pouch is substantially fixed relative to said envelope. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A heating or cooling pad comprising:
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A) an outer, flexible, sealed, envelope containing a high thermal capacity first material, said envelope being impervious to said first material; B) at least one inner pouch also contained within said envelope, said pouch comprising a high thermal capacity second material sealed within an enclosing web that is impervious to said second material, so that said first and second materials cannot mix, in which said at least one inner pouch further comprises two separate chambers hermetically sealed from each other by a frangible partition and the two chambers containing different materials which, when mixed together after manually breaking said partition, form said high thermal capacity second material and also produce either heat or cold upon mixing; C) said first material being non-rigid at about zero degrees centigrade.
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20. A heat transfer device for heating and cooling a surface, the device comprising:
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an envelope formed of first and second sheets, the sheet having broad faces; each sheet formed of an outer panel of flexible, liquid-impermeable webbing, the panels joined together on all edges to define therebetween a volume that contains a high thermal capacity first material that is not rigid at about zero degrees centigrade; and the volume further containing therein at least one pouch sealingly enclosing a space, the space containing therein a high thermal capacity second material, the pouch being formed of web that is impermeable to said first and second material so that said first and second materials cannot mix, in which said at least one pouch further comprises two separate chambers hermetically sealed from one another by a frangible partition and the two chambers contain different parts which, when mixed together after manually rupturing the partition, from said high thermal capacity second material and also generate either heat or cold.
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Specification
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Litigation Data
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Current AssigneeMary Der Ovanesian
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Original AssigneeMary Der Ovanesian
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InventorsDer Ovanesian, Mary
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Primary Examiner(s)Dvorak, Linda C. M.
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Assistant Examiner(s)Ruddy, David M.
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Application NumberUS09/118,488Time in Patent Office718 DaysField of Search607/96-114, 62/530, 120/204, 383/901, 105/46US Class Current607/114CPC Class CodesA61F 2007/0219 GelsA61F 2007/0292 using latent heat produced ...A61F 7/02 Compresses or poultices for...F24V 30/00 Apparatus or devices using ...F28D 20/02 using latent heatF28D 2020/0008 the heat storage material b...Y02E 60/14 Thermal energy storage
