• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a heating pad (1) comprising an inflatable envelope provided with a valve (8) for admitting, expelling or blocking a fluid or a gas inside said inflatable envelope, so forming a cushion when the fluid or gas is admitted and blocked in said inflatable envelope, said inflatable envelope having at least an upper face (4) and a lower face (3). A heat producing element (5) is placed above, or in contact with, the upper face (4) of the inflatable envelope. This heating element (5) is connected to an energy source (6) in order to produce heat. The inflatable envelope, the heating element (5) and the energy source (6) are included in an outer envelope (7).
    公开号:BE1021670B1
    申请号:E2013/0193
    申请日:2013-03-22
    公开日:2016-01-05
    发明作者:Jean-Christophe Uyttebrock；Marc Lacroix；Etienne Baise
    申请人:Jean-Christophe Uyttebrock；Marc Lacroix；Etienne Baise；
    IPC主号:
    专利说明:

    Heating pillow
    Field of the Invention [0001] The present invention relates to the field of heating pads. More particularly, the invention relates to a heating pad comprising at least a lower face and an upper face, said heating pad also comprising a seat member comprising at least a lower face and an upper face, a heat generating element placed in contact heat exchanger with at least a portion of the upper face of the heating pad, a portable power source connected to the heat generating member to produce said heat, and an outer shell comprising the inflatable seat member , the heat generating element and the portable power source.
    STATE OF THE ART
    [0002] Heat pads have existed for a long time, for example from patent WO 2005/023057. These cushions can be used in many circumstances, for example during activities in the wilderness (camping, hiking, fishing ...) or at sporting events (outdoors as in the stadium, or indoors or at the rink). When the surrounding temperature is low, a physiological response of the body is the vasoconstriction of the circulatory system and the reduction of blood flow to the extremities of the body. The heating cushions make it possible to avoid such a physiological reaction while ensuring a sitting comfort. Existing heating pads, however, have a number of disadvantages. On the one hand, these cushions are relatively bulky during their transport by their foam structure having a volume difficult to reducible, which is problematic when the volume of objects that a user can carry is limited. As a result, the current heating pads are not adapted to be transported easily. At the same time, the heating pads of the prior art have the disadvantage of either heating non-useful areas of the cushion (such as the lower surface of the cushion resting on the support on which the heating pad is placed), or of directing the heat flow towards the floor. users by means of heat shields which greatly limit its flexibility, or to limit the heat transfer by the addition of insulating layers. Thus, the current heating pads have either a dissipation of heat directed towards the user, or a complex and expensive structure to isolate the lower or even side surfaces of the heating pad to prevent losses of thermal energy.
    There is no heating pad having a reduced size during transport. In addition, the current heating pads have either supernumerary structures to direct the thermal flow to the user, or a non-negligible user-directed energy flow, causing a significant energy loss, thus limiting the efficiency and effectiveness of the energy supply. autonomy of the heating pad.
    SUMMARY OF THE INVENTION
    An object of the present invention is to solve, at least partially, the problems associated with the transport of a heating pad and the minimization of heat losses.
    To this end, the heating pad according to the present invention is characterized in that the seat member comprises an inflatable envelope provided with a valve for admitting, expelling or blocking a fluid or a gas inside said inflatable envelope, so as to form a cushion when the fluid or gas is admitted and blocked in said inflatable envelope.
    Such a heating pad has the property of being able to be emptied of the fluid or the gas filling it and to be folded around the portable energy source during the transport of the object. When using the heating pad, the fluid or gas blocked in the inner medium of the inflatable envelope constitutes a thermal insulation layer, and, moreover, the contents of the internal medium of the seat element do not does not drain and the heat accumulated in this element is kept within the heating pad, thus limiting heat loss. The result is an easily transportable heating pad that has satisfactory thermal properties, reducing heat loss and thus increasing the autonomy of the object. The heating pad according to the invention allows its user a mechanical insulation and thermal insulation of the support on which is placed the heating pad. The heating pad thus provides an effective heating system for heating the user for an extended period of time, while being easily transportable when the heating pad is uninflated and folded.
    A heating pad according to the invention and can dispense with heat shields and insulating materials supernumerary. Such a cushion makes it possible to have a comfortable sitting position while presenting optimal thermal insulation properties with respect to the support on which the cushion is placed, which support may be for example made of concrete, steel, wood, plastic or in polymer resin, materials that can at certain times of the year be particularly cold, and which are very often uncomfortable as a seat.
    In a preferred embodiment, the seat member is self-inflatable and the inner medium of the inflatable member comprises a polymer cell matrix. Such a configuration makes it possible to further limit the heat transfer towards the lower surface of the seat element and thus to have an even more efficient heating pad, without impairing the folding capacity of the heating pad.
    [0009] These and other aspects of the invention will be clarified in the detailed description of particular embodiments of the invention.
    BRIEF DESCRIPTION OF THE FIGURES [0010] The figures are given for information only and do not constitute a limitation of the present invention. Moreover, the proportions of the drawings are not respected. Identical or like components are generally designated by the same reference numerals among all the figures.
    Fig.1 shows a top view of a heating pad according to an embodiment of the invention.
    Fig.2 shows a longitudinal section along the median plane AA 'of a heating pad according to one embodiment of the invention.
    Fig.3 shows a top view of the invention according to an alternative embodiment of the invention.
    Fig.4 shows a top view of the invention according to another alternative embodiment of the invention.
    Fig.5 shows a top view of the invention according to an alternative embodiment of the invention.
    Fig.6a shows a top view of the invention accompanied by 3 possible axes of folding.
    Fig.6b shows a front view of the invention in the direction of the arrow of the axis z of Fig.6a, with the deflated seat element.
    Figure 6c shows the same front view of the invention after folding in the direction of the width along two axes.
    Figure 6d shows the same front view of the invention after folding in the direction of the length of the invention following the folding illustrated in the previous figure.
    Detailed description of particular embodiments of
    THE INVENTION
    Figure 1 and Figure 2 firstly show generally and schematically a heating pad 1 according to the invention when the latter is deployed and inflated. This heating pad 1 comprises an upper face 21 and a lower face 22, and it also comprises a seat element 2 comprising at least one lower face 3 and an upper face 4, a heat-generating element 5 placed in exchange contact. with at least a portion of the upper face 21 of the heating pad 1, a portable power source 6 connected to the heat generating element 5 by connecting means 12 to produce said heat. The seat element 2, the heat-generating element 5 and the portable energy source 6 are included in an outer envelope 7. By heat-generating element 5, it is necessary to understand a conductive and resistive element, such as a wire conductor having a linear resistance or a conductive sheet comprising a conductive material and having a surface resistance. The heat generating element 5 can be placed above the upper face 4 of the seat element 2 or in contact with the upper face 4 of the seat element 2. The heat-generating element 5 can be a flexible element. By flexible, it should be understood that this element is likely to undergo curvature without breaking, while having an electrical resistance to produce heat when this element is traversed by an electric current. This element must for example be able to be folded without breaking and remaining functional, the heating pad can be folded along several axes. The portable power source 6 may for example be a battery, possibly rechargeable. Preferably, the portable power source 6 is capable of delivering a power of between 5 and 20 W / h. Even more preferably, the energy source is capable of delivering a power of between 7 and 14 W / h. Preferably, the portable power source 6 is a self-contained and rechargeable pack, such as for example a lithium-ion polymer battery, nickel-cadmium, or nickel-metal hydride. The portable power source 6 is connected to the heat generating element so as to supply power to produce heat. The connection can be made by conventional means of connection between a portable power source and an electrical resistance heating element. Preferably, the power source is capable of supplying the heat generating element for a period of 1 hour to 8 hours, depending on the power delivered.
    The seat member 2 comprises an inflatable envelope provided with a valve 8 for admitting, expelling or blocking a fluid or a gas inside said inflatable envelope, so as to form a cushion when the fluid or gas is admitted and blocked in said inflatable envelope. A valve 8 must be understood as being a shutter member of an inflatable envelope orifice allowing the passage of a fluid or a gas when this element does not close the orifice of the inflatable envelope. When the valve 8 closes this orifice, the passage of a fluid or a gas through this orifice is impossible. A valve 8 is a mechanical member for closing and opening the inflatable envelope on demand.
    The seat element 2 can also be defined as comprising an inflatable envelope, said inflatable envelope delimiting an internal medium, said inflatable envelope comprising a valve for controlling a passage of a flow of liquid or gas between the internal medium and an external medium, said inner medium of the inflatable element being impermeable to the external medium when the valve 8 blocks the passage of the flow of liquid or gas. By waterproof, it should be understood that the internal medium is an isolated medium of the external environment when the valve 8 blocks the passage of a flow. The internal medium can be separated from the surrounding environment.
    The inflatable envelope may be any element allowing its filling to form a cushion. There is no limit to the geometric shape that this inflatable envelope can have. It can be square, rectangular, polygonal, or in any other geometric form. In a preferred embodiment of the invention, the inflatable envelope may be of parallelepipedal shape. In general, the inflatable envelope comprises an internal volume that can be inflated upon entry of an inflation medium such as atmospheric air, pressurized air, a gas or a liquid. Preferably, the internal medium may be delimited by at least two outer sheets sealed to each other on their outer periphery in an impervious manner, with the exception of a zone of the outer periphery comprising input control means and / or output of a flow of air or liquid, such as a valve. The outer sheets are in this peripheral zone imperviously sealed on the inlet and / or outlet control means of a flow of air or liquid.
    The valve 8 is a means for regulating the passage of a flow of liquid or gas. The valve 8 may be a bidirectional valve or a shutter. This means allows the passage of a flow to the inner environment of the seat element, or to the outside environment, when the means is in the open position. When this means is in the closed position, the passage of a flow is blocked, thus making the inner environment impervious to the external environment. Due to the low thermal conductivity of the internal medium of the seat element, a significant thermal insulation is created between the heat generating element 5 on the upper face 4 of the seat element 2 and the lower face 22. of the heating pad 1, in general in contact with a cold surface. When the valve 8 blocks the passage of an air or gas fluid, the inner medium of the inflatable envelope is closed, there is no successive inflating and deflating phenomenon of this inflatable envelope, thus preventing the external medium to penetrate into the inner environment of the inflatable envelope. The internal medium is thus blocked, and there is therefore no physical exchange between this internal medium and the surrounding environment, thus preventing heat exchange by this route. The internal environment can be filled with pressurized air, or alternatively with a gas or a liquid.
    In one embodiment of the invention, shown in Figure 1, the heating element 5 consists of at least one electrically conductive wire, for example a metal wire, for example copper. This wire may comprise a polymer sheath, for example a silicone sheath. Even more preferably, the at least one conducting wire has an electrical resistance expressed in Ohm between the digital value of the nominal voltage of the portable power source divided by 4 and 1.5 times the digital value of nominal voltage of the portable power source. Alternatively, the at least one conducting wire has an electrical resistance expressed in Ohm between the nominal value of the nominal voltage of the portable power source divided by 8 and 3 times the nominal value of the nominal voltage of the energy source. portable. Alternatively, the at least one conducting wire has an electrical resistance expressed in Ohm between the nominal value of the portable power source divided by 3 and 1.2 times the digital value of the nominal voltage of the source of power. portable energy.
    In an alternative embodiment of the invention, shown in Figure 3, the heating element 5 comprises at least one conductive material included in a polymeric matrix, a varnish or a film. The conductive material may for example be a carbon material, such as graphite, graphene, exfoliated graphite, carbon nanoparticle, carbon black, graphite carbon, carbon nanotube. The conductive material may also be a copper or silver nanoparticle, a copper or silver wire, or conductive oxide particles such as doped zinc oxide, for example. The polymeric matrix may for example be a matrix comprising a silicone. The polymer matrix can also result from the reaction of a precursor, for example the hydrolysis or the polycondensation of a silane. According to a preferred embodiment of the invention, the heating element 5 comprises carbon nanotubes within a silicone matrix. According to an alternative or complementary embodiment, the heating element 5 comprises carbon black in a silicone matrix. Alternatively, the heating element 5 comprises at least one conductive material included in a varnish comprising at least one curable material. Even more preferably, the heating element 5 according to this embodiment has a surface electrical resistance expressed in Ohm between the digital value of nominal voltage of the portable power source divided by 8 and 3 times the digital voltage value. nominal of the portable power source. Alternatively, the heating element 5 according to this embodiment has a surface electrical resistance expressed in Ohm between the digital value of nominal voltage of the portable energy source divided by 16 and 6 times the digital value of nominal voltage of the portable power source. Alternatively, the heating element 5 according to this embodiment has a surface electrical resistance expressed in Ohm between the digital value of nominal voltage of the portable power source divided by 4 and 1.5 times the digital voltage value. nominal of the portable power source. Alternatively, the heating element 5 according to this embodiment has a surface electrical resistance expressed in Ohm between the nominal value of the nominal voltage of the portable energy source divided by 2 and 0.75 times the digital voltage value. nominal of the portable power source.
    In one embodiment of the invention, the heat-generating element 5 can be fixed on the upper face of the seat element. This fixing can be done by gluing, welding, or by any other similar means or equivalent.
    In an alternative embodiment of the invention, the heat-generating element 5 can be fixed in contact with the upper face 4 of the seat element 2, this contact being made inside the body. inflatable envelope, the heat-generating element 4 then being included in the seat element 2.
    According to a preferred embodiment of the invention, the inner medium of the inflatable envelope comprises a polymeric cell matrix. A cell matrix structure is generally a structure comprising a plurality of cells of generally identical size arranged to form a repetitive geometric structure, and including convection barriers between each cell to reduce heat exchange in a plurality of directions.
    The heat transfer is minimized by the presence of an inflatable envelope having an internal structure in a cellular matrix. The inner medium of the inflatable envelope is a closed medium. The movements of the gas or fluid inside the inflatable envelope are therefore limited and therefore limit the transfer of heat directed towards this inflatable envelope in the direction of its lower surface, and because of the impermeability of the envelope inflatable, the heat directed to this inflatable envelope is not dissipated by expulsion of the gas or the inner fluid to the outside environment.
    Alternatively or complementary, the inflatable envelope is self-inflatable. Such a configuration makes it possible to avoid inflation by forced air injection, such as inflation by the mouth or by an air pump. In this configuration, the inflatable envelope comprises in its internal medium a material that can naturally expand to occupy a larger volume within the inflatable envelope. This expansion (or expansion) can be achieved only when the valve 8 allows the admission of a fluid or a gas inside the envelope. As the material expands, the volume of the inflatable envelope increases with the degree of expansion of the material in the inflatable envelope.
    According to a preferred embodiment of the invention, the heating pad has a ratio between the heat flux produced by the heat-generating element 5 directed towards the user of the heating pad 1 and the heat flux produced by the heat generating element 5 directed towards the surface on which is placed the lower face 22 of the heating pad 1 is greater than or equal to two. Preferably, this ratio may be greater than or equal to 3, or 4, or 5, or 10, 15, 20, 30, 45 or 60.
    This ratio can be measured according to the following method: the thermal flux is equal to:
    with <p the thermal flux expressed in W, T2 the temperature of the heat-generating element, expressed in K, T1 the surface temperature of the body of interest towards which the thermal flux is directed, expressed in K, R the resistance thermal expressed in K / W. The inverse of the thermal resistance R is given by:
    With k the thermal conductivity of the interface traversed by the thermal flux, expressed in W / (mK) S, the surface of the interface traversed by the thermal flux φ, expressed in m2, / the thickness of the interface traversed by the thermal flux φ, expressed in m.
    By interface, it is necessary to understand any physical element situated between the element generating heat and the body of interest.
    The thermal conductivities vary according to the temperature and materials considered. Thermal conductivity lists of different materials can be found in tables known to those skilled in the art.
    Thus, we can write that:
    Thus for a heating pad of 25 cm by 36 cm, S is equal to 0.09 m 2. The flow directed to the user must pass through a fabric interface including the outer shell of the heating pad, and the user's clothing. In this case, k is equal to 0.1W / (m.K) and / is 0.001m, so R is equal to about 0.111 K / W.
    The flow directed towards the surface on which the heating pad is placed must pass through an interface comprising the inflatable seat and the underside of the outer casing. In this case, k is equal to 0.025W / (m.K) and / is equal to 0.030m, and thus R is equal to about 13.33 K / W.
    We consider two temperatures (T2) for the heating element. T2 can thus be equal to 47 ° C (320.15 K) or 67 ° C (340.15 K). We also consider two outside temperatures of use (T1), representative of winter weather conditions. T1 may be equal to -13 ° C (260.15 K) or 7 ° C (280.15 K). The temperature of the user (ΤΊ) is considered equal to 37 ° C (310,15 K).
    Table 1: Ratios between the thermal flow directed towards the user of the heating pad and the thermal flow directed towards the upper surface on which the heating pad is placed as a function of the temperature T2 of the heating element, the temperature T1 of the medium outside and temperature ΤΊ of the user.
    Although the flux cp is proportional to the heating surface S, the ratio between the flows is independent of this surface. With the heating pad according to the present invention, the energy losses are reduced. Thus, in cold weather (-13 ° C), the portion of thermal flux not received by the user is between 2.22 and 5% of the total heat flow. In cool weather (7 ° C), the portion of thermal flux not received by the user is between 1.66 and 3.33% of the total heat flux.
    According to an even more preferred embodiment of the invention, shown in Figures 4 and 5, the heating element is positioned in two zones corresponding to the contact areas between the lower limbs of the user and the heating pad . The said zones may be two parallel zones, as shown in FIG. 4, distributed on either side of the portable energy source. Preferably, each of these two areas covers an area equivalent to at least 25% of the upper surface of the heating pad. Even more preferably, each of these two areas covers an area equivalent to at least 40% of the upper surface of the heating pad.
    Alternatively, as shown in Figure 5, the two zones can be distributed on either side of the portable power source, substantially symmetrical to the central axis of the heating pad.
    Such a configuration allows to heat only the areas in contact with the user, reducing the energy consumption of the heating pad. It is not necessary to have a comfort of use to heat the areas that are not in contact with the user, since the heat transfer is mainly in the contact areas, for which the thermal resistance is uniform.
    According to a preferred embodiment of the invention, the heating pad 1 is characterized in that the volume of the non-inflated and folded heating pad and comprising the portable energy source 6 is less than 1/3 (or 33 %) of the volume of the heating pad 1 deployed and inflated during its use. The volume of the inflated and unfolded heating pad corresponds to the volume occupied by the outer casing, the seat element occupying the major part of the outer casing, the portable energy source being wedged between the seat element and the outer envelope (the volume of the heat generating element can be neglected here). The volume of the uninflated and folded heating pad corresponds to the volume occupied by the seat element to which is added the volume of the portable energy source. For example, the heating pad can have dimensions of 25 cm wide by 36 cm long by 4 cm thick when it is deployed and inflated, ie a volume of 3600 cm3. As shown in FIG. 6, to fold the non-inflated airbag 9 (FIG. 6b), it is possible initially to fold in the direction of the width along two axes (y1 and y2 in FIG. 6a). , which can be parallel, and thus allow the folding into three parts in the width direction of the heating pad (fig.6c). Another folding axis (z in Fig.6a), perpendicular to the first two, allows to fold the heating pad in the direction of the length. The width of the heating pad is thus divided by two and its length is divided by three, while the thickness is six times greater (fig.6d). During the folding, 6 layers of 0.52 cm are thus stacked, ie a thickness of 3.12 cm. The volume occupied by the heating pad is therefore equal to the volume occupied by the deflated and folded seat element and by the portable energy source (incompressible volume of 150 cm 3 for example), the outer envelope 7 being glued to the 2. The volume theoretically occupied by the heating pad when uninflated and folded is therefore 618 cm 3. The volume of the deflated heating pad and folded can be greater than 618 cm3, for example when the folding is not optimal, and the inflatable envelope is not completely emptied of its contents. Thus, the heating pad can have a volume of less than 1200 cm3 in non-inflated and folded mode, and a volume of at least 3600cm3 when inflated and inflated, a ratio of 1/3 (or 33%) between uninflated and folded mode and expanded and inflated mode.
    The invention provides a thermal insulation without the supernumerary presence of a heat shield, or a material whose sole function would be to be insulating, or one or more heat shields. Preferably, the present invention is devoid of a supernumerary thermally insulating material between the heat-generating element 5 and the seat element 2. Due to the structure of the seat element, such an insulating element is not necessary to prevent heat loss to the surface of the support on which the lower surface 22 of the heating pad 1 rests. Supernumerary thermally insulating material must be understood to mean any material capable of creating thermal insulation between the producing element 5 and the seat member 2. In a still preferred manner, the present invention is devoid of a material capable of reflecting heat between the heat generating element 5 and the seat element 2.
    Preferably, the heat-generating flexible element 5 is not covered with a layer of supernumerary materials in order to separate the heat-generating element 5 from the outer envelope 7.
    The invention may also be in the form of a kit, the kit comprising a heating pad 1 according to any one of the embodiments of the invention and a charger that can charge the energy source. portable 6 connected to the heat generating element 5.
    The invention may also be summarized as follows: it relates to a cushion comprising an inflatable element capable of blocking a liquid or a gas in an internal medium, said inflatable element having at least one upper face and one lower face. A heat generating element is placed above or in contact with the upper face of the inflatable element. This heating element is connected to a power source to produce heat. The inflatable element, the heating element and the energy source are included in an envelope.
    The present invention has been described in relation to specific embodiments, which have a purely illustrative value and should not be considered as limiting. In general, it will be apparent to those skilled in the art that the present invention is not limited to the examples illustrated and / or described above. The invention includes each of the novel features as well as all their combinations. The presence of reference numbers in the drawings can not be considered as limiting, even when these numbers are indicated in the claims. The use of the verbs "to understand", "to include", "to include", or any other variant, as well as their conjugation, can in no way exclude the presence of elements other than those mentioned. The use of the indefinite article "a", "an", or the definite article "le", "la", or "Γ", to introduce an element does not exclude the presence of a plurality of these elements.
    权利要求:
    Claims (15)
    [1]
    Claim
    Heating pad (1) comprising at least one upper face (21) and one lower face (22), said heating pad (1) also comprising: - a seat element (2) comprising at least one lower face ( 3) and an upper face (4), - a heat generating element (5) placed in heat exchange contact with at least a portion of the upper face (21) of the heating pad (1), - a source of portable energy (6) connected to the heat generating element (5) to produce said heat; - an outer shell (7) comprising the base member (2), the heat generating member (5) , the portable power source (6), characterized in that the seat element (2) comprises an inflatable envelope provided with a valve (8) for admitting, expelling or blocking a fluid or a gas inside said inflatable envelope, so as to form a cushion when the fluid or the gas is admitted is and blocked in said inflatable envelope.
    [2]
    Heating pad (1) according to claim 1, characterized in that the heat generating element (5) is placed above the upper face (4) of the seat element.
    [3]
    Heating pad (1) according to one of the preceding claims, characterized in that the heat generating element (5) is placed in contact with the upper face (4) of the seat element.
    [4]
    4. Heating pad (1) according to any one of the preceding claims, characterized in that the heat generating element (5) comprises at least one electrically conductive wire polymeric sheath.
    [5]
    5. heating pad (1) according to claim 4, characterized in that the electrically conductive wire has an electrical resistance between the nominal digital voltage value of the portable power source divided by 4 and 1.5 times the nominal voltage value of the portable power source
    [6]
    Heating pad (1) according to any one of claims 1 to 3, characterized in that the heat generating element (5) comprises at least one conductive material comprised within a polymeric matrix, a varnish or a movie.
    [7]
    7. heating pad (1) according to claim 6, characterized in that the heat-generating element (5) comprises a carbon black and / or carbon nanotubes within a silicone matrix.
    [8]
    Heating pad (1) according to claim 6 or 7, characterized in that the heat generating element (5) has a surface resistance of between the nominal voltage value of the portable power source divided by 8 and 3 times the digital value of the nominal voltage of the battery.
    [9]
    Heating pad (1) according to any one of claims 6 to 8, characterized in that the polymeric matrix comprising the conductive material is fixed on the upper face (4) of the seat element by bonding, welding or any other similar means.
    [10]
    10. Heating pad (1) according to any one of the preceding claims, characterized in that the inner medium of the inflatable envelope comprises a polymeric cell matrix.
    [11]
    11. Heating pad (1) according to any one of the preceding claims, characterized in that the inflatable envelope is self inflatable.
    [12]
    Heating pad (1) according to one of the preceding claims, characterized in that the ratio between a heat flux produced by the heat generating element (5) towards the user of the heating pad and a heat flow. produced by the heat generating element (5) towards a surface on which the lower face (22) of the heating pad is placed is greater than two.
    [13]
    Heating pad (1) according to any one of the preceding claims, characterized in that the volume of the non-inflated (9) and folded heating pad (1) is less than or equal to 33% of the volume of the heating pad (1). deployed and inflated.
    [14]
    Heating pad (1) according to one of the preceding claims, characterized in that the heat generating element (5) is positioned in two zones corresponding to the areas of contact between the lower limbs of the user and the cushion. heating, the two zones being distributed on either side of a central axis of the heating pad (1).
    [15]
    15. Kit comprising a heating pad (1) according to any one of the preceding claims and a charger capable of charging the portable power source (6) connected to the heat generating element.
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    KR100996158B1|2010-06-18|2010-11-23|박국철|Pillow have fomentation function|
    CN201888551U|2010-11-22|2011-07-06|曹书雅|Seat cushion or bed cushion|
    CN202009897U|2011-03-28|2011-10-19|刘延廷|Multifunctional chair cushion|
    法律状态:
    2020-12-23| MM| Lapsed because of non-payment of the annual fee|Effective date: 20200331 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP12161031.5A|EP2641509A1|2012-03-23|2012-03-23|Heating pad|
    EP121610315|2012-03-23|
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