CA1097716A - Electric mattress and subcombinations thereof - Google Patents
Electric mattress and subcombinations thereofInfo
- Publication number
- CA1097716A CA1097716A CA262,101A CA262101A CA1097716A CA 1097716 A CA1097716 A CA 1097716A CA 262101 A CA262101 A CA 262101A CA 1097716 A CA1097716 A CA 1097716A
- Authority
- CA
- Canada
- Prior art keywords
- electric mattress
- layer
- upper layer
- occupant
- polyurethane foam
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
- H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C21/00—Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
- A47C21/04—Devices for ventilating, cooling or heating
- A47C21/048—Devices for ventilating, cooling or heating for heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/005—Heaters using a particular layout for the resistive material or resistive elements using multiple resistive elements or resistive zones isolated from each other
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/033—Heater including particular mechanical reinforcing means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/037—Heaters with zones of different power density
Abstract
Abstract of the Invention An electric mattress and subcombinations character-ized by a thick fire-retardent foam rubber pad overlying one or more heating pads with a plurality of separately controllable heating zones.
Description
Summ ry of the Invention The invention provides an electric mattress, and subcombinations thereof, in which a thick, fire-retardant -foam pad is provided over one or more electric heating pads. In another aspect, the invention provides such pads in which are provided more than a single separately controllable heating zone. In preferred embodiments for lighter users, as in baby mattresses, the thick pad is at least one-half inch thick, a thinner fire-resistant faam pad is proYided beneath the electric heating pad, and there are provided two transversely spaced heating pads, each diyided into three longitudinally spaced separately controllable heating zones. In preferred embodiments for heayy people, the thick pad should be at least about one inch thick, to prevent their body's crushing it uncomfortably near a heating pad.
Background of the InYention The invention relates to electric mattressesand to subcombinations useful therein.
One electric mattress was disclosed in Westerburg et al U.S. Patent No~ 2,606,996r in which a single zone heating element layer was provided beneath a quilted layer.
Important objects of the present inYentiOn are to provide for improved heat conservation and dis-tribution, both in the way insulat~ve values are provided and varied and thro~gh proyision for separately controlling the quantity of heat proyi,ded at different areas of the body.
Summary of the Invention The present invention is defined as an electric mattress, comprising a base layer of polyurethane foam material, an upper layer of polyurethane foam defining an occupant supporting member and a heating pad interposed bm:
between the layers of foam material at least the upper layer of polyurethane foam having a cellular construction that inhibits the transfer of heat therethrough without any load applied thereto, the upper layer being compressible under the load of an occupant to permit the transfer of heat from the heating pad through the compressed portions thereof for increasing the temperature of the upper layer of polyurethane foam in contact with the occupant.
Brief Descriptîon of the Drawings Fig. 1 is a perspective view of a preferred em~odiment of a mattress according to the invention;
Fig. 2 is a plan view, partially broken a~ay, thereof.
Fig. 3 is a partial sectional view therethrough at 3-3 in Fig. 2;
Fig. 4 is a partially broken away plan view, somewhat diagrammatic, of a mattress pad of the preferred embodiment of the invention;
Fig 5 is an isometric YieW of a control box for said preferred embodiment;
Fig. 6 is a diagrammatic plan view of a mattress according to the invention and carrying only a single heating pad; and Fig. 7 is a circuit diagram of said embodiment.
Description of the Preferred Embodiment Turning now in more detail to the presently preferred embodiment of the invention, there is shown in Fig. 1 an electric mattress 10 incorporating two mattress heating pads 12, each pad providing three different heating zones A mattress heating pad 12 is shown in diagrammatic (the wires are not dotted, as they should be for strict accuracy, inter alia) view in Fig. 4~ A first section 14 of resistance wire is connected between wire 16 and common ~)"77~6 wire 18. A second, intermediate, section 20 of resistance wire is connected between wire 22 and common wire 18. A
third section 24 of resistance wire is connected between wire 26 and common wire 18. The first section is a 30-watt section, while each of the second and third sections is a 60-watt section.
In the 30-watt section, the heating wire is 7.1 mil diameter wire (60% Ni, 16.2% Cr, 23.8% Fe, sold as "Alloy C" by Jelliss Manufacturing Company), wound helically to provide a coil with 10 turns per inch and a diameter over the coil of 34 mils, to provide great flexibility and an overall resistance of 18.75 ohms per foot; longitudinal stability without impairment of flexibility is provided by a 25 mil strand of fiberglass yarn extending co-axially with the coil inside it; each run of coiled wire in this section is 17 inches long (with one-half inch pad border free of wire), and adjacent runs are about one-half inch apart.
In the sixty-watt sections, the resistance wire is similarly coiled (10 coils per inch) about a twenty-five mil fiberglass yarn extending therethrough, and each run again extends 17 inches, although adjacent runs are only about 3/8" apart. However, the wire is 8 mils (22g Ni, 78% Cu, sold by said Jelliss Manufacturing Company as "Alloy 180"), with an as-coiled resistance of 3.7 ohms per foot and a diameter over the coiled wire of 3~ mils.
Each mattress pad draws 1.25 amperes when fully actuated at all three zones.
In manufacturing a mattress heating pad as herein described, the four copper wires 16, 18, 22 and 26 are silver-soldered to the resistance wires of sections 14, 20, and 24, respectively. A silicone rubber cord set at bm:
1~7716 its end and the three zones of resistance wires are then placed centrally between two sheets of fiberglass-reinforced uncured silicone rubber, each 10 mils in overall thickness and each having therein a 5-mil thick very open weave layer of woven fiberglass cloth (A.S.T.M. Style 1620), the rubber extending through interstices of the cloth. This sandwich is prevulcanized, then, in a conventional press, at 300F. and 90 psi for one minute, extra silicone rubber being provided around the soldered connections for protection and insulation. The resultant sandwich is placed between two further layers of material, each extending beyond the initial sandwich 1/4" on all sides. These further, outer, layers of material are also of fiberglass-reinforced unvulcanized silicone rubber, but are 23 mils thick, and the tightly woven fiberglass fabric (A.S.T.M~
Style 162) carried in them, with the rubber in the interstices thereof, is 18 mils thick. The total sandwich is cured then in the same press for 10 minutes at 300F.
and 90 psi.
This combination thus reinforced, constituted, and laminated, provides great pad durability, flexibility, and freedom from tendency to return to a previously-creased configuration (crease memory).
Each pad is controlled by one of the knobs 27, 28, 30 (Fig. 5), which respectively operate 200 watt dimmers 32, 34, and 36 (Fig. 7). These dimmers are similar to ordinary light dimmers, except that they provide as soon as turned on at all (switches 38, 40, and 42 closed) a flow of current great enough for meaningful heating, and are sold by Leviton Manufacturing Company, Inc. under Catalog Number 6204-4. When the dimmers are actuated, and switches 38, 40 and 42 thus closed, neon signal lights 44, 46, and 48 bm:
lQ.','773,6 (Leecraft Manufacturing Co., Inc.) turn on. Control boxes 50 are made of high impact polystyrene, and polyvinyl butyrate strain relief elements (not shown) secure electrical cords thereto.
The wire electrical cords 52 and four-wire electrical cords 54 are non-migrating polyvinyl "thermoplastic"
cord sets. Cords 54 are joined at Jones plugs 56, which insure proper continued four wire orientation, to silicone rubber 4-wire cord sets (Marquell, U.S. Style 3132).
The circuitry is shown in Fig. 7, the three wires 16, 22, and 26 being shown connected between dimmers 32, 34, and 36 and heating element sections 14, 20, and 24, respectively, the common wire 18 in each instance completing the circuit.
Fig. 3 shows somewhat diagranunatically the preferred en~bodiment of mattress. Atop box springs 58 are 6 ounce jute pads 60, ~ 1/2 ounce Coirtex pad 62, a layer of 6 pound per batt density cotton batting 64, a 3/8" sheet of fire retardant polyurethane tdensity 1.8) 66, a one-inch th~ck layer of fire retardant polyurethane foam (density 2.4~ 63, and cover (6a% polyester and 4096 cotton) 70. Squeezed bet~een foam layers 66 and 68 are heating pads 12 (Dennison clips passing through grommeted 1/8" holes adjacent the four corners of each heating pad hold together as a unit these pads 12 and layers 60, 62, 64, and 66). The bump caused l~y incoming cord set 56 is placed toward the bottom o~ the mattress. At least the upper layer of polyurethane foam has a cellular construction that inhibits the transfer of heat therethrough without any load applied thereto.
The thick upper form pad has the advantages that it is such a good insulator that even though its surface * Trademark 1~77i6 is hot relative to what is comfortable to the human body, as it is when on and not in direct nearby contact with a human body, upon such contact so little heat flows to cool it down to what is comfortable that its hotness is not really perceptible to the touch. Furthermore, where the body lies compresses the foam and reduces its insulating quality proportionately to body weight, selectively increasing heat flow at the very points where useful, and con,s,erving insulation at points where heat flow is not as useful.
Other embodiments within the spirit of the invention and the scope of the appended claims will occur to those skilled in the art.
bm:
Background of the InYention The invention relates to electric mattressesand to subcombinations useful therein.
One electric mattress was disclosed in Westerburg et al U.S. Patent No~ 2,606,996r in which a single zone heating element layer was provided beneath a quilted layer.
Important objects of the present inYentiOn are to provide for improved heat conservation and dis-tribution, both in the way insulat~ve values are provided and varied and thro~gh proyision for separately controlling the quantity of heat proyi,ded at different areas of the body.
Summary of the Invention The present invention is defined as an electric mattress, comprising a base layer of polyurethane foam material, an upper layer of polyurethane foam defining an occupant supporting member and a heating pad interposed bm:
between the layers of foam material at least the upper layer of polyurethane foam having a cellular construction that inhibits the transfer of heat therethrough without any load applied thereto, the upper layer being compressible under the load of an occupant to permit the transfer of heat from the heating pad through the compressed portions thereof for increasing the temperature of the upper layer of polyurethane foam in contact with the occupant.
Brief Descriptîon of the Drawings Fig. 1 is a perspective view of a preferred em~odiment of a mattress according to the invention;
Fig. 2 is a plan view, partially broken a~ay, thereof.
Fig. 3 is a partial sectional view therethrough at 3-3 in Fig. 2;
Fig. 4 is a partially broken away plan view, somewhat diagrammatic, of a mattress pad of the preferred embodiment of the invention;
Fig 5 is an isometric YieW of a control box for said preferred embodiment;
Fig. 6 is a diagrammatic plan view of a mattress according to the invention and carrying only a single heating pad; and Fig. 7 is a circuit diagram of said embodiment.
Description of the Preferred Embodiment Turning now in more detail to the presently preferred embodiment of the invention, there is shown in Fig. 1 an electric mattress 10 incorporating two mattress heating pads 12, each pad providing three different heating zones A mattress heating pad 12 is shown in diagrammatic (the wires are not dotted, as they should be for strict accuracy, inter alia) view in Fig. 4~ A first section 14 of resistance wire is connected between wire 16 and common ~)"77~6 wire 18. A second, intermediate, section 20 of resistance wire is connected between wire 22 and common wire 18. A
third section 24 of resistance wire is connected between wire 26 and common wire 18. The first section is a 30-watt section, while each of the second and third sections is a 60-watt section.
In the 30-watt section, the heating wire is 7.1 mil diameter wire (60% Ni, 16.2% Cr, 23.8% Fe, sold as "Alloy C" by Jelliss Manufacturing Company), wound helically to provide a coil with 10 turns per inch and a diameter over the coil of 34 mils, to provide great flexibility and an overall resistance of 18.75 ohms per foot; longitudinal stability without impairment of flexibility is provided by a 25 mil strand of fiberglass yarn extending co-axially with the coil inside it; each run of coiled wire in this section is 17 inches long (with one-half inch pad border free of wire), and adjacent runs are about one-half inch apart.
In the sixty-watt sections, the resistance wire is similarly coiled (10 coils per inch) about a twenty-five mil fiberglass yarn extending therethrough, and each run again extends 17 inches, although adjacent runs are only about 3/8" apart. However, the wire is 8 mils (22g Ni, 78% Cu, sold by said Jelliss Manufacturing Company as "Alloy 180"), with an as-coiled resistance of 3.7 ohms per foot and a diameter over the coiled wire of 3~ mils.
Each mattress pad draws 1.25 amperes when fully actuated at all three zones.
In manufacturing a mattress heating pad as herein described, the four copper wires 16, 18, 22 and 26 are silver-soldered to the resistance wires of sections 14, 20, and 24, respectively. A silicone rubber cord set at bm:
1~7716 its end and the three zones of resistance wires are then placed centrally between two sheets of fiberglass-reinforced uncured silicone rubber, each 10 mils in overall thickness and each having therein a 5-mil thick very open weave layer of woven fiberglass cloth (A.S.T.M. Style 1620), the rubber extending through interstices of the cloth. This sandwich is prevulcanized, then, in a conventional press, at 300F. and 90 psi for one minute, extra silicone rubber being provided around the soldered connections for protection and insulation. The resultant sandwich is placed between two further layers of material, each extending beyond the initial sandwich 1/4" on all sides. These further, outer, layers of material are also of fiberglass-reinforced unvulcanized silicone rubber, but are 23 mils thick, and the tightly woven fiberglass fabric (A.S.T.M~
Style 162) carried in them, with the rubber in the interstices thereof, is 18 mils thick. The total sandwich is cured then in the same press for 10 minutes at 300F.
and 90 psi.
This combination thus reinforced, constituted, and laminated, provides great pad durability, flexibility, and freedom from tendency to return to a previously-creased configuration (crease memory).
Each pad is controlled by one of the knobs 27, 28, 30 (Fig. 5), which respectively operate 200 watt dimmers 32, 34, and 36 (Fig. 7). These dimmers are similar to ordinary light dimmers, except that they provide as soon as turned on at all (switches 38, 40, and 42 closed) a flow of current great enough for meaningful heating, and are sold by Leviton Manufacturing Company, Inc. under Catalog Number 6204-4. When the dimmers are actuated, and switches 38, 40 and 42 thus closed, neon signal lights 44, 46, and 48 bm:
lQ.','773,6 (Leecraft Manufacturing Co., Inc.) turn on. Control boxes 50 are made of high impact polystyrene, and polyvinyl butyrate strain relief elements (not shown) secure electrical cords thereto.
The wire electrical cords 52 and four-wire electrical cords 54 are non-migrating polyvinyl "thermoplastic"
cord sets. Cords 54 are joined at Jones plugs 56, which insure proper continued four wire orientation, to silicone rubber 4-wire cord sets (Marquell, U.S. Style 3132).
The circuitry is shown in Fig. 7, the three wires 16, 22, and 26 being shown connected between dimmers 32, 34, and 36 and heating element sections 14, 20, and 24, respectively, the common wire 18 in each instance completing the circuit.
Fig. 3 shows somewhat diagranunatically the preferred en~bodiment of mattress. Atop box springs 58 are 6 ounce jute pads 60, ~ 1/2 ounce Coirtex pad 62, a layer of 6 pound per batt density cotton batting 64, a 3/8" sheet of fire retardant polyurethane tdensity 1.8) 66, a one-inch th~ck layer of fire retardant polyurethane foam (density 2.4~ 63, and cover (6a% polyester and 4096 cotton) 70. Squeezed bet~een foam layers 66 and 68 are heating pads 12 (Dennison clips passing through grommeted 1/8" holes adjacent the four corners of each heating pad hold together as a unit these pads 12 and layers 60, 62, 64, and 66). The bump caused l~y incoming cord set 56 is placed toward the bottom o~ the mattress. At least the upper layer of polyurethane foam has a cellular construction that inhibits the transfer of heat therethrough without any load applied thereto.
The thick upper form pad has the advantages that it is such a good insulator that even though its surface * Trademark 1~77i6 is hot relative to what is comfortable to the human body, as it is when on and not in direct nearby contact with a human body, upon such contact so little heat flows to cool it down to what is comfortable that its hotness is not really perceptible to the touch. Furthermore, where the body lies compresses the foam and reduces its insulating quality proportionately to body weight, selectively increasing heat flow at the very points where useful, and con,s,erving insulation at points where heat flow is not as useful.
Other embodiments within the spirit of the invention and the scope of the appended claims will occur to those skilled in the art.
bm:
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electric mattress, comprising a base layer of polyurethane foam material, an upper layer of polyurethane foam defining an occupant supporting member and a heating pad interposed between said layers of foam material at least the upper layer of polyurethane foam having a cellular construction that inhibits the transfer of heat therethrough without any load applied thereto, said upper layer being compressible under the load of an occupant to permit the transfer of heat from said heating pad through the compressed portions thereof for increasing the temperature of said upper layer of polyurethane foam in contact with said occupant.
2. An electric mattress as claimed in claim 1, said occupant supporting upper layer being thicker than said-base layer.
3. An electric mattress as claimed in claim 2, said base layer having a thickness of less than one inch.
4. An electric mattress as claimed in claim 3, said occupant supporting layer having a thickness of approximately one inch.
5. An electric mattress as claimed in claim 1, said heating pad having a plurality of heating zones, each of said zones being individually controlled and including separate electrical circuits therefor.
6. An electric mattress as claimed in claim 5, said occupant supporting layer being thicker than said base layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US620,548 | 1975-10-08 | ||
| US05/925,809 US4162393A (en) | 1975-10-08 | 1978-07-18 | Electric heating mattress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1097716A true CA1097716A (en) | 1981-03-17 |
Family
ID=25452274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA262,101A Expired CA1097716A (en) | 1975-10-08 | 1976-09-27 | Electric mattress and subcombinations thereof |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4162393A (en) |
| JP (1) | JPS5517092A (en) |
| CA (1) | CA1097716A (en) |
| DE (1) | DE2923244A1 (en) |
| ES (1) | ES482552A1 (en) |
| FR (1) | FR2431270A1 (en) |
| GB (1) | GB2051528A (en) |
| SE (1) | SE7904924L (en) |
Families Citing this family (54)
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|---|---|---|---|---|
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| DE3446017A1 (en) * | 1984-12-17 | 1986-06-19 | Stierlen-Maquet Ag, 7550 Rastatt | DEVICE FOR TRANSFERRING ITEMS OR PERSONS |
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| US20060278628A1 (en) * | 2005-06-08 | 2006-12-14 | Foggett James A | Heated inflatable air bed |
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| US10667622B1 (en) * | 2008-07-30 | 2020-06-02 | Youngblood Ip Holdings, Llc | Multi-zone temperature modulation system for bed or blanket |
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| DE102011013506B4 (en) | 2011-03-10 | 2014-09-11 | Karlheinz Gailing | mattress |
| US10820714B2 (en) * | 2011-05-23 | 2020-11-03 | Koninklijke Philips N.V. | Temperature-controlled multi-zone mattress-style support |
| PL2908699T3 (en) * | 2012-10-18 | 2018-12-31 | Tempur-Pedic Management, Llc | Support cushion |
| CN103876525A (en) * | 2012-12-20 | 2014-06-25 | 罗莱家纺股份有限公司 | Temperature-adjustment mattress with adjustable zone |
| US9408939B2 (en) | 2013-03-15 | 2016-08-09 | Medline Industries, Inc. | Anti-microbial air processor for a personal patient warming apparatus |
| US9066601B1 (en) | 2013-05-07 | 2015-06-30 | Zamarud Aminy | Heating mattress |
| US20150230622A1 (en) * | 2014-02-17 | 2015-08-20 | George Orbelian | Devices for prevention of bed bug infestations and elimination of existing bed bug infestations, and methods of preventing bed bug infestations and eliminating existing bed bug infestations. |
| CN105607672B (en) | 2014-11-19 | 2021-03-23 | 保利集团澳门有限公司 | Temperature control system and method for air mattress |
| WO2018022760A1 (en) * | 2016-07-27 | 2018-02-01 | Philip Sherman | Climate controlled mattress system |
| US10827846B2 (en) * | 2016-10-28 | 2020-11-10 | Sleep Number Corporation | Bed with foot warming system |
| US10245177B2 (en) * | 2016-12-02 | 2019-04-02 | Eva Harvis | Temperature controlled blanket |
| US10327417B2 (en) * | 2017-10-04 | 2019-06-25 | Thomas J. Gaskill | Static electricity discharging pet bed |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735926A (en) * | 1956-02-21 | langlois | ||
| US3125663A (en) * | 1964-03-17 | Heated pet bed | ||
| NL62141C (en) * | ||||
| CA459058A (en) * | 1949-08-23 | Van Daam Gerrit | Electrically heated device | |
| US2052644A (en) * | 1934-11-12 | 1936-09-01 | Murphy Morton | Rubber heating unit |
| US2114396A (en) * | 1936-12-18 | 1938-04-19 | Mcfarlan Ronald Lyman | Heating pad |
| US2688070A (en) * | 1950-03-14 | 1954-08-31 | Dayton Rubber Company | Electrically heated mattress construction |
| US2715674A (en) * | 1953-03-12 | 1955-08-16 | Howard C Abbott | Electrically heated mattress and sleeping pad |
| GB792671A (en) * | 1955-02-17 | 1958-04-02 | Bernard Hicks Ltd | Improvements in or relating to spring interior mattresses |
| US2873352A (en) * | 1957-06-17 | 1959-02-10 | Vincraft Inc | Waterproof plastic heating pad |
| US3118153A (en) * | 1960-10-21 | 1964-01-21 | Davidson Rubber Company Inc | Upholstery corner construction |
| BE616787A (en) * | 1961-04-25 | 1900-01-01 | ||
| US3380087A (en) * | 1965-08-30 | 1968-04-30 | Frances M. Petty | Electrically heated sleeping bag |
| US3423574A (en) * | 1965-10-14 | 1969-01-21 | Sanders Associates Inc | Electrical resistance heating pad |
| US3924284A (en) * | 1974-06-17 | 1975-12-09 | Alvin M Nelson | Thermo-cloud electric mattress |
-
1976
- 1976-09-27 CA CA262,101A patent/CA1097716A/en not_active Expired
-
1978
- 1978-07-18 US US05/925,809 patent/US4162393A/en not_active Expired - Lifetime
-
1979
- 1979-06-06 SE SE7904924A patent/SE7904924L/en unknown
- 1979-06-08 GB GB7920105A patent/GB2051528A/en not_active Withdrawn
- 1979-06-08 DE DE19792923244 patent/DE2923244A1/en not_active Withdrawn
- 1979-06-11 FR FR7914908A patent/FR2431270A1/en not_active Withdrawn
- 1979-06-13 JP JP7452079A patent/JPS5517092A/en active Pending
- 1979-07-17 ES ES482552A patent/ES482552A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4162393A (en) | 1979-07-24 |
| FR2431270A1 (en) | 1980-02-15 |
| SE7904924L (en) | 1980-01-19 |
| JPS5517092A (en) | 1980-02-06 |
| DE2923244A1 (en) | 1980-01-31 |
| ES482552A1 (en) | 1980-02-16 |
| GB2051528A (en) | 1981-01-14 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |