# US 2014/0150179 A1 · Heated air cushion cover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150179 A1 - Document ID: US20140150179A1 - Status: Published application - Kind: A1 - Application number: 14/116,869 - Filed: 2012-05-11 - Published: 2014-06-05 - Earliest claimed: 2011-05-11 - Assignees: GFM Ingenieur-und Produktionstechnik GmbH - Inventors: Herbert Gawarecki - Web page: https://patentgrep.com/patent/US20140150179A1 ## CPC - A47G 9/0215: {with cooling or heating means (electric blankets H05B3/34)} - A61F 7/0097: {Blankets with active heating or cooling sources (warming mats A61F7/08)} - B32B 3/26: characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} - B32B 3/28: characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence) - B32B 7/04: Interconnection of layers - A61F 2007/006: {of gas} - A61F 2007/0091: {inflatable} - A61F 2007/0098: {ways of manufacturing heating or cooling devices for therapy} - B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter - A47G: HOUSEHOLD OR TABLE EQUIPMENT (book-ends A47B5/00; knives B26B) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A heated air cushion cover, especially for heat regulation of patients during surgeries, having at least one first material layer connected to at least perforated second material layer so as to form at least one hollow chamber through which an air stream can flow to the outer, patient side of the second material layer is improved by a homogeneous warm air output being produced on the patient side. The homogeneous warm air output is attained by an air-permeable third material layer being at least partially connected to the outer side of the second material layer. The third material layer diffusely distributes the air stream penetrating the perforations of the second material layer upon passing through the third material layer. ## Claims ### Claim at position 1 1-11. (canceled) ### Claim 12 A heated air cushion cover, comprising: at least one first material layer, at least one perforated second material layer, air inlet opening, wherein the first material layer is connected to the second material layer in a manner in which at least one cavity is formed through which a stream of air can flow from the air inlet opening and emerge from the at least one cavity to an outer side of the second material layer, wherein an air-permeable third material layer is at least partially connected to the outer side of the second material layer, the air-permeable third material layer being able to diffusely distribute the air stream passing through the perforations of the second material layer as the air stream passes through the air-permeable third material layer. ### Claim 13 (depends on 12) The heated air cushion cover as claimed in claim 12, wherein the air-permeable third material layer is an air-permeable textile fabric. ### Claim 14 (depends on 13) The heated air cushion cover as claimed in claim 13, wherein the air-permeable textile fabric is in the form of a fleece or nonwoven material. ### Claim 15 (depends on 13) The heated air cushion cover as claimed in claim 13, wherein the air-permeable textile fabric has a weight between 5 g/m2 and 50 g/m2. ### Claim 16 (depends on 13) The heated air cushion cover as claimed in claim 13, wherein the air-permeable textile fabric has a weight between 15 g/m2 and 25 g/m2. ### Claim 17 (depends on 12) The heated air cushion cover as claimed in claim 12, wherein the second material layer and the third material layer are only partially joined to one another so that the air stream passing through via the perforation of the second material layer is distributed in at least one cavity between the second material layer and the third material layer. ### Claim 18 (depends on 17) The heated air cushion cover as claimed in claim 17, wherein the third material layer is joined to the second material layer in an undulating manner forming cavities between the second and third material layers. ### Claim 19 (depends on 18) The heated air cushion cover as claimed in claim 18, wherein the second material layer has a smaller area than that of the third material layer by about 1.5% to 15%. ### Claim 20 (depends on 12) The heated air cushion cover as claimed in claim 12, wherein at least one of the first material layer and the second material layer is a plastic film selected from the group consisting of polypropylene (PP), polyethylene (PE) and a mixture of polypropylene and polyethylene. ### Claim 21 (depends on 12) The heated air cushion cover as claimed in claim 12, wherein the second material layer and the third material layer are connected to one another along at least one set of connecting lines which run parallel to each other with adjacent connecting lines being spaced from one another by a distance of between 0.5 cm and 2 cm. ### Claim 22 (depends on 21) The heated air cushion cover as claimed in claim 21, wherein the at least one set of connecting lines comprises two sets of parallel connecting lines which form a rhomboidal pattern of connecting lines. ### Claim 23 A method for producing the heated air cushion cover, comprising the steps of: elastically stretching at least one second material layer and partially joining an air permeable third material layer to the elastically stretched second material layer, then relaxing the stretching of the second material layer so that the second material layer returns to an area smaller than that of the third material layer so as to create undulations in the third material layer which form airs spaces between the second and third material layers, air flowing into said spaces via perorations of the second material layer being able to pass through the air permeable third layer in a diffused manner, and then, partially connecting at least one first material layer to the at least one perforated second material layer in a manner forming at least one cavity through which a stream of air can flow from an air inlet opening and emerge from the at least one cavity through the perforations of the second material layer to the cavities between the perforated second material layer and the air permeable third material layer. ### Claim 24 (depends on 23) The method as claimed in claim 23, wherein the second material layer is elastically stretched by an amount between 1.5% and 15%. ### Claim 25 (depends on 24) The method as claimed in claim 24, wherein the second material layer is elastically stretched by roughly 8%. ### Claim 26 (depends on 24) The method as claimed in claim 24, wherein the partial connecting of the second material layer and the third material layer is performed by cementing. ### Claim 27 (depends on 24) The method as claimed in claim 24, wherein the partial connecting of the second material layer and the third material layer is performed by thermal or ultrasonic bonding.