US3621192A - Electrically heated chair - Google Patents

Electrically heated chair Download PDF

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Publication number
US3621192A
US3621192A US867122A US3621192DA US3621192A US 3621192 A US3621192 A US 3621192A US 867122 A US867122 A US 867122A US 3621192D A US3621192D A US 3621192DA US 3621192 A US3621192 A US 3621192A
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reclining
heating
layer
article
furniture
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US867122A
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Alfred Pohler
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Schwarzkopf Technologies Corp
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Schwarzkopf Technologies Corp
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Assigned to SCHWARZKOPF TECHNOLOGIES CORPORATION, A CORP. OF MD reassignment SCHWARZKOPF TECHNOLOGIES CORPORATION, A CORP. OF MD CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 05/21/1991 Assignors: SCHWARZKOPF DEVELOPMENT CORPORATION, A CORP. OF MD
Expired - Lifetime legal-status Critical Current

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    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/62—Accessories for chairs
    • A47C7/72—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like
    • A47C7/74—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling
    • A47C7/748—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling 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
    • H05B2203/011—Heaters using laterally extending conductive material as connecting 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
    • H05B2203/016—Heaters using particular connecting 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
    • H05B2203/029—Heaters specially adapted for seat warmers

Definitions

  • the reclining section including a reclining, flexible heating surface having a layer of electrically conductive heating material, insulating layers enclosing said electrically conductive layer, and electrical contacts connected to said heating material for electrical connection to live voltage or a battery.
  • the heating material having a positive temperature coefficient of electrical resistance to minimize voltage supply requirements and to provide current limitations.
  • This invention relates to electrically heated furniture and is described in terms of a chair structure, more specifically a heated reclining chair.
  • the heating of the reclining section is accomplished with a surface heat conducting unit which reduces only slightly the flexibility of the body supporting or reclining structure.
  • the heating unit can be built integrally in the reclining surface, or the reclining surface can be treated to serve as a heat conductor.
  • FIGS. 1 and 2 are isometric views which illustrate linebattery-energized embodiments
  • F IG. 3 is a plan schematic view of the and FIG. 4 is a sectional schematic view through the reclining section on an enlarged scale.
  • H0. 1 shows a deck chair which except as noted hereinafter is of customary construction. Assembled in the reclining section 1 is an electrically heatable surface heating unit. On the bottom of the deck chair a socket 7 (FIG. 3) is attached, the socket being connected with the surface heating unit by electric wiring as described hereinafter. In the socket a plug 12 with a flexible extension cable 13 has been inserted, the latter serving as a connection to a source of electric current.
  • FIG. 2 illustrates a battery-powered embodiment of the invention.
  • the transverse rods 2 of the chair are of hollow cylindrical shape and serve to receive the battery, e.g., the cell 3.
  • the principal component of the heating arrangement is the surface heating unit 4, which is shown in FIG. 3. It can advantageously consist of a carrier material consisting of a synthetic material, e.g. Teflon, which has been treated to be heat conductive. Suitable techniques and compositions for this purpose have been reported in the literature and published patents. See for example, Swiss Pat. No. 456,741 as shown therein, the resistance material can preferably be made from nonpolar plastic materials including polyolefins, e.g., polypropylene, polyethylene, polybutene or mixtures thereof. Polyvinylchloride and lupolen can also be used. Dispersed in the nonconductive component may be graphite or carbon black.
  • the surface heating unit is flexible and preferably substantially coextensive with the entire reclining surface or actually constitutes the reclining surface.
  • the resistance value of these conductive layers may be selected such that the heating can be carried out with voltages not exceeding lethal values, e.g., voltages less than 65 volts. ln this case the special precautions required to avoid shock are not necessary.
  • lethal values e.g., voltages less than 65 volts. ln this case the special precautions required to avoid shock are not necessary.
  • alternating current via stepdown transformers (e.g., one which reduces the mains voltage to say 42 volts), or direct current, from batteries e.g. cells supplying 6, 12 or 24 volts.
  • stepdown transformers e.g., one which reduces the mains voltage to say 42 volts
  • direct current from batteries e.g. cells supplying 6, 12 or 24 volts.
  • surface heating unit 4 one can and surface heating unit;
  • the contact strips deposit the contact strips 5, as shown in FIG. 3, alongside the surface heating unit. This may be done for example by spraying copper to form the contacts. With these contact strips one can achieve an even distribution of current over the complete surface. Alternatively, the contact strips can be disposed over the broadside of the surface.
  • the current conductor wires 6 are welded or soldered to the contact strips 5 or connected thereto by using appropriate connectors.
  • the wires 6 are connected in turn to the socket 7. Should a low voltage be required (preferably no more than 65 volts) a suitable socket of special configuration must be provided which will not receive the customary line voltage plugs. lf batteries are used, they can be placed on the underside of the chair, e.g., in the hollow transverse rod 2.
  • FIG. 4 illustrates a cross section of the finished reclining structure.
  • the surface heating unit 4 which in this case is constructed from fabric, are copper wires 8 disposed in the selvedge to improve conductivity to the contact strips 5.
  • the surface heating unit is covered with insulating material 9.
  • the heat-insulating layer 10 is provided. in this case it consists of a synthetic material e.g., a coating of PVC or epoxy resin affixed to a rough aluminum foil heat reflector 11.
  • the insulator 10 and the foil 11, the surface heating unit 4, and insulating layers 9, are encapsulated in the fabric sections 1, which forms the actual reclining surface of the deck chair.
  • chairs according to the invention require very little electric power. Generally one needs less than 30 watts of power.
  • the chair is particularly effective for use on cold, sunny winter days. The user of the deck chair is exposed in this event to the warm sun energy on one side and the warmth of the reclining section of the deck chair on the other.
  • the invention is not to be limited to the specific examples shown and is adaptable to other seats as well including garden chairs or benches, Hollywood swings, hammocks, car seats, chair lifts and the like.
  • An article of furniture comprising a body support having a plurality of longitudinal members arranged to for man open frame, and a reclining section connected to said frame to provide a seating area within the frame, said reclining section including a reclining surface having a flexible heating section which includes a layer of electrically conductive heating material with integral temperature-responsive distributed current-limiting means, insulation means for electrically insulating said layer of heating material, and electrical contact means connected to said heating material for supplying a voltage to said material whereby said reclining section is electrically heated, said current-limiting means comprise a material having a positive temperature coefficient of electrical resistance.
  • heating surface includes a layer of spray-deposited electrical contact material connected to said heating material.
  • said layer of heating material comprises a unitary flexible plastic sheet occupying a substantial part of said reclining section.

Abstract

An article of body-supporting furniture having an open frame and a receiving section connected to said frame to provide a seating area within the frame. The reclining section including a reclining, flexible heating surface having a layer of electrically conductive heating material, insulating layers enclosing said electrically conductive layer, and electrical contacts connected to said heating material for electrical connection to live voltage or a battery. The heating material having a positive temperature coefficient of electrical resistance to minimize voltage supply requirements and to provide current limitations.

Description

United States Patent 72] Inventor Alfred Pohler Reutte, Austria [21] Appl. No. 867,122 4 [22] Filed Oct. 17, 1969 [45] Patented [73] Assignee Nov. 16, l 971 Schwarzkopf Development Corporation New York, N.Y.
[ 32] Priority Nov. 11, 1968 3 3] Austria [54] ELECTRICALLY HEATED CHAIR 5 Claims, 4 Drawing Figs.
52 u.s.c1 219/217, 5 284, 128/377, 219/527, 219/536, 219/544,
[56] References Cited UNITED STATES PATENTS 2,559,077 7/1951 Johnson et al. 219/543 3,125,663 3/1964 Hoffman 219/217 3,375,774 4/1968 Fujimura et al 219/441 X 692,554 2/1902 Stanger 128 377 2,299,162 10/1942 Marick 219 527 2,735,926 2/1956 Langlois. 219/528 2,481,050 9/1949 Starnes 297/180X 2,741,298 4/1956 Roberts.. 297/56x 3,017,493 1/1962 Cooke 219/217x 3,060,303 10/1962 Skoglundetal. 219/549 3,385,959 5/1968 Amesetal 219/549 3,400,254 9/1968 Takemori 219/549 3,448,246 6/1969 Armbruster .1 219/528 FORElGN PATENTS 427,039 3/1926 Germany 219/217 1,077,798 8/1967 0163113111111" 219/217 Primary Examiner- Volodymyr Y. Mayewsky Attorney-Morgan, Finnegan, Durham & Pine ABSTRACT: An article of body-supporting furniture having an open frame and a receiving section connected to said frame to provide a seating area within the frame. The reclining section including a reclining, flexible heating surface having a layer of electrically conductive heating material, insulating layers enclosing said electrically conductive layer, and electrical contacts connected to said heating material for electrical connection to live voltage or a battery. The heating material having a positive temperature coefficient of electrical resistance to minimize voltage supply requirements and to provide current limitations.
This invention relates to electrically heated furniture and is described in terms of a chair structure, more specifically a heated reclining chair.
The use of deck chairs in open air on sunny but cool days has the disadvantage of exposing the body of the user to markedly different temperatures. It is an object of this invention to eliminate that disadvantage.
According to a further characteristic of the invention the heating of the reclining section is accomplished with a surface heat conducting unit which reduces only slightly the flexibility of the body supporting or reclining structure. The heating unit can be built integrally in the reclining surface, or the reclining surface can be treated to serve as a heat conductor.
Serving to illustrate the exemplary embodiments are the drawings of which:
FIGS. 1 and 2 are isometric views which illustrate linebattery-energized embodiments;
F IG. 3 is a plan schematic view of the and FIG. 4 is a sectional schematic view through the reclining section on an enlarged scale.
H0. 1 shows a deck chair which except as noted hereinafter is of customary construction. Assembled in the reclining section 1 is an electrically heatable surface heating unit. On the bottom of the deck chair a socket 7 (FIG. 3) is attached, the socket being connected with the surface heating unit by electric wiring as described hereinafter. In the socket a plug 12 with a flexible extension cable 13 has been inserted, the latter serving as a connection to a source of electric current.
FIG. 2 illustrates a battery-powered embodiment of the invention. The transverse rods 2 of the chair are of hollow cylindrical shape and serve to receive the battery, e.g., the cell 3.
The principal component of the heating arrangement is the surface heating unit 4, which is shown in FIG. 3. It can advantageously consist of a carrier material consisting of a synthetic material, e.g. Teflon, which has been treated to be heat conductive. Suitable techniques and compositions for this purpose have been reported in the literature and published patents. See for example, Swiss Pat. No. 456,741 as shown therein, the resistance material can preferably be made from nonpolar plastic materials including polyolefins, e.g., polypropylene, polyethylene, polybutene or mixtures thereof. Polyvinylchloride and lupolen can also be used. Dispersed in the nonconductive component may be graphite or carbon black. The surface heating unit is flexible and preferably substantially coextensive with the entire reclining surface or actually constitutes the reclining surface.
As current conducting materials one can use in addition to glass fibers, jute or muslin weavings, also sheets or weavings of artificial materials such as Diolen or Nylon. These conductive cloths and sheets generally exhibit a strong positive temperature coefficient of electrical resistance, so that current limiting occurs with increased heat and there is no primary dependence on external heat controls such as thermostats and the like. With the use of such surface heating units the danger of overheating is therefore avoided. In addition, they are insensitive to humidity and water.
The resistance value of these conductive layers may be selected such that the heating can be carried out with voltages not exceeding lethal values, e.g., voltages less than 65 volts. ln this case the special precautions required to avoid shock are not necessary. For energizing the heater, one can employ alternating current via stepdown transformers (e.g., one which reduces the mains voltage to say 42 volts), or direct current, from batteries e.g. cells supplying 6, 12 or 24 volts. To simplify electric connection with the surface heating unit 4, one can and surface heating unit;
deposit the contact strips 5, as shown in FIG. 3, alongside the surface heating unit. This may be done for example by spraying copper to form the contacts. With these contact strips one can achieve an even distribution of current over the complete surface. Alternatively, the contact strips can be disposed over the broadside of the surface.
The current conductor wires 6 are welded or soldered to the contact strips 5 or connected thereto by using appropriate connectors. The wires 6 are connected in turn to the socket 7. Should a low voltage be required (preferably no more than 65 volts) a suitable socket of special configuration must be provided which will not receive the customary line voltage plugs. lf batteries are used, they can be placed on the underside of the chair, e.g., in the hollow transverse rod 2.
FIG. 4 illustrates a cross section of the finished reclining structure. Woven into the surface heating unit 4, which in this case is constructed from fabric, are copper wires 8 disposed in the selvedge to improve conductivity to the contact strips 5. if the deck chair requires a voltage over say 65 volts (e.g. line voltages) then the surface heating unit is covered with insulating material 9.
To reduce the heat loss at the underside of the reclining section as much as possible, the heat-insulating layer 10 is provided. in this case it consists of a synthetic material e.g., a coating of PVC or epoxy resin affixed to a rough aluminum foil heat reflector 11. The insulator 10 and the foil 11, the surface heating unit 4, and insulating layers 9, are encapsulated in the fabric sections 1, which forms the actual reclining surface of the deck chair.
It has been established that chairs according to the invention require very little electric power. Generally one needs less than 30 watts of power. The chair is particularly effective for use on cold, sunny winter days. The user of the deck chair is exposed in this event to the warm sun energy on one side and the warmth of the reclining section of the deck chair on the other.
The invention is not to be limited to the specific examples shown and is adaptable to other seats as well including garden chairs or benches, Hollywood swings, hammocks, car seats, chair lifts and the like.
What is claimed is:
1. An article of furniture comprising a body support having a plurality of longitudinal members arranged to for man open frame, and a reclining section connected to said frame to provide a seating area within the frame, said reclining section including a reclining surface having a flexible heating section which includes a layer of electrically conductive heating material with integral temperature-responsive distributed current-limiting means, insulation means for electrically insulating said layer of heating material, and electrical contact means connected to said heating material for supplying a voltage to said material whereby said reclining section is electrically heated, said current-limiting means comprise a material having a positive temperature coefficient of electrical resistance.
2. An article offurniture as defined in claim 1, in which said heating surface has a value of resistivity selected to provide a suitable heat output when energized by voltages of less than lethal value.
3. An article of furniture as defined in claim 1, in which said heating surface includes a layer of spray-deposited electrical contact material connected to said heating material.
4. An article of furniture as defined in claim 1, in which said layer of heating material comprises a unitary flexible plastic sheet occupying a substantial part of said reclining section.
5. An article of furniture as defined in claim I, in which said layer of heating material constitutes a principal load-supporting component ofsaid reclining flexible section.
a i t

Claims (5)

1. An article of furniture comprising a body support having a plurality of longitudinal members arranged to form an open frame, and a reclining section connected to said frame to provide a seating area within the frame, said reclining section including a reclining surface having a flexible heating section which includes a layer of electrically conductive heating material with integral temperature-responsive distributed current-limiting means, insulation means for electrically insulating said layer of heating material, and electrical contact means connected to said heating material for supplying a voltage to said material whereby said reclining section is electrically heated, said currentlimiting means comprise a material having a positive temperature coefficient of electrical resistance.
2. An article of furniture as defined in claim 1, in which said heating surface has a value of resistivity selected to provide a suitable heat output when energized by voltages of less than lethal value.
3. An article of furniture as defined in claim 1, in which said heating surface includes a layer of spray-deposited electrical contact material connected to said heating material.
4. An article of furniture as defined in claim 1, in which said layer of heating material comprises a unitary flexible plastic sheet occupying a substantial part of said reclining section.
5. An article of furniture as defined in claim 1, in which said layer of heating material constitutes a principal load-supporting component of said reclining flexible section.
US867122A 1968-11-11 1969-10-17 Electrically heated chair Expired - Lifetime US3621192A (en)

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AT1095468A AT306871B (en) 1968-11-11 1968-11-11 Deck chair

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808403A (en) * 1971-07-20 1974-04-30 Kohkoku Chemical Ind Co Waterproof electrical heating unit sheet
US4186294A (en) * 1978-02-03 1980-01-29 Bender Joseph M Radiant therapeutic heater
US4413857A (en) * 1979-11-06 1983-11-08 Nissan Motor Co., Ltd. Seat cover
US4514620A (en) * 1983-09-22 1985-04-30 Raychem Corporation Conductive polymers exhibiting PTC characteristics
WO1987001549A1 (en) * 1985-08-26 1987-03-12 Odd Stephan Irgens A device for heating with energy saving in cars and boats
US5034594A (en) * 1989-08-09 1991-07-23 Beezhold Frank L Portable electrically heated seat cushion
US5408068A (en) * 1991-12-24 1995-04-18 Ng; Wai-Man Electric heater for use in vehicle
US5516189A (en) * 1994-11-14 1996-05-14 Ligeras; Achilles P. Portable heated seat
US5718722A (en) * 1996-09-11 1998-02-17 Kiefer; John Steven Lower back heater mat with a leg support
US20040041541A1 (en) * 2002-09-03 2004-03-04 Christoph Hinteregger Cable railroad system
US20040094996A1 (en) * 2002-11-20 2004-05-20 Edward Zheng Collapsible chair
CN100572160C (en) * 2003-03-10 2009-12-23 创新专利有限公司 The seat of the seat of cableway system and/or the method for heating of backrest cushion and the seat that for this reason is suitable for
US20100032998A1 (en) * 2008-08-05 2010-02-11 Michael Eckman Portable collapsible camp chair with heated seat and back
US20100283295A1 (en) * 2009-05-08 2010-11-11 Smith Reanna Gayle Heated collapsible article of furniture
US7866743B1 (en) * 2008-03-06 2011-01-11 Russell Randy P Temperature adjustable chair
US20120313405A1 (en) * 2008-08-05 2012-12-13 Eckman Michael B Portable collapsible camp chair with heated seat and back
US20130153560A1 (en) * 2011-12-20 2013-06-20 Sidus Technologies, Inc. Towel warmer
US20160038335A1 (en) * 2011-06-30 2016-02-11 Ji Hoon Park Sliding-Type Apparatus for Thermotherapeutic Treatment
US20160152167A1 (en) * 2014-11-04 2016-06-02 Eric Kozlowski Instant Hot/Cold Seat
US20170086513A1 (en) * 2015-09-24 2017-03-30 Crated Inc. Smart garment, garment insert, and methods
US9775438B1 (en) 2010-07-16 2017-10-03 Mark D. Schulenberg Heated and recreational chairs
US10405662B2 (en) * 2017-03-02 2019-09-10 Rio Brands, Llc Folding X-frame chair with extended backrest

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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EP0139635A1 (en) * 1983-04-15 1985-05-08 Ab Mekania-Verken Heating pad preferably for car seats
AU2006338890A1 (en) * 2006-02-27 2007-08-30 Taduko Ono Battery charging chair heating method and battery charging chair heating device and charging battery type heating chair
DE102013201943B8 (en) * 2013-02-06 2017-08-03 Sander Digital Pictures GmbH heater

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US3125663A (en) * 1964-03-17 Heated pet bed
GB1077798A (en) * 1964-10-08 1967-08-02 Ici Ltd Electrically heated chairs
US3375774A (en) * 1967-01-05 1968-04-02 Matsushita Electric Ind Co Ltd Fully automatic electric coffee pot
US3385959A (en) * 1964-05-29 1968-05-28 Ici Ltd Flexible heating elements
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US692554A (en) * 1900-06-26 1902-02-04 Johann Jakob Stanger Chair for therapeutic purposes.
DE427039C (en) * 1922-09-20 1926-03-23 Charles Fauris Foot warmer
US2299162A (en) * 1941-05-22 1942-10-20 Us Rubber Co Electrically heated sinus pad
US2559077A (en) * 1946-07-01 1951-07-03 Carl G Westerberg Resistance element and method of preparing same
US2481050A (en) * 1948-09-23 1949-09-06 Starnes George Eli Foot and leg rest
US2741298A (en) * 1953-03-02 1956-04-10 Trans Trading Corp Folding rocking chair
US3060303A (en) * 1958-07-29 1962-10-23 George A Skoglund Heating element
US3017493A (en) * 1960-01-22 1962-01-16 Pyrexon Ray Company Ltd Heated car seat
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GB1077798A (en) * 1964-10-08 1967-08-02 Ici Ltd Electrically heated chairs
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US3375774A (en) * 1967-01-05 1968-04-02 Matsushita Electric Ind Co Ltd Fully automatic electric coffee pot
US3448246A (en) * 1967-10-09 1969-06-03 Fritz Armbruster Electrical heating mat with automatic temperature control

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808403A (en) * 1971-07-20 1974-04-30 Kohkoku Chemical Ind Co Waterproof electrical heating unit sheet
US4186294A (en) * 1978-02-03 1980-01-29 Bender Joseph M Radiant therapeutic heater
US4303074A (en) * 1978-02-03 1981-12-01 Pascal & Associates Method for applying therapeutic heat
US4413857A (en) * 1979-11-06 1983-11-08 Nissan Motor Co., Ltd. Seat cover
US4514620A (en) * 1983-09-22 1985-04-30 Raychem Corporation Conductive polymers exhibiting PTC characteristics
WO1987001549A1 (en) * 1985-08-26 1987-03-12 Odd Stephan Irgens A device for heating with energy saving in cars and boats
US5034594A (en) * 1989-08-09 1991-07-23 Beezhold Frank L Portable electrically heated seat cushion
US5408068A (en) * 1991-12-24 1995-04-18 Ng; Wai-Man Electric heater for use in vehicle
US5516189A (en) * 1994-11-14 1996-05-14 Ligeras; Achilles P. Portable heated seat
US5718722A (en) * 1996-09-11 1998-02-17 Kiefer; John Steven Lower back heater mat with a leg support
US20040041541A1 (en) * 2002-09-03 2004-03-04 Christoph Hinteregger Cable railroad system
US7002319B2 (en) * 2002-09-03 2006-02-21 Innova Patent Gmbh Cable railroad system
CN100379618C (en) * 2002-09-03 2008-04-09 因诺瓦专利有限责任公司 Cableway railway system
US20040094996A1 (en) * 2002-11-20 2004-05-20 Edward Zheng Collapsible chair
US6824210B2 (en) * 2002-11-20 2004-11-30 Edward Zheng Collapsible chair
CN100572160C (en) * 2003-03-10 2009-12-23 创新专利有限公司 The seat of the seat of cableway system and/or the method for heating of backrest cushion and the seat that for this reason is suitable for
US7866743B1 (en) * 2008-03-06 2011-01-11 Russell Randy P Temperature adjustable chair
US20100032998A1 (en) * 2008-08-05 2010-02-11 Michael Eckman Portable collapsible camp chair with heated seat and back
US20120313405A1 (en) * 2008-08-05 2012-12-13 Eckman Michael B Portable collapsible camp chair with heated seat and back
US8979192B2 (en) * 2008-08-05 2015-03-17 Timothy R. Miller Portable collapsible camp chair with heated seat and back
US8388056B2 (en) 2009-05-08 2013-03-05 ReAnna Gayle Smith Heated collapsible article of furniture
US20100283295A1 (en) * 2009-05-08 2010-11-11 Smith Reanna Gayle Heated collapsible article of furniture
US9775438B1 (en) 2010-07-16 2017-10-03 Mark D. Schulenberg Heated and recreational chairs
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