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| Number | Title | Issue Date |
| 8153938 | Added electrical heater for a heating system or air conditioner of a motor vehicle The invention relates to an added electrical heater (1), especially for a heating system or air conditioner of a motor vehicle. A plurality of heating elements (2) are provided which are formed by PTC elements while being fitted with at least one elect... | 04/10/2012 |
| 7361868 | Electrical heating device, especially for motor vehicles This disclosure relates to an electrical heating device, especially for motor vehicles, including a closed frame (2) which include rails (3, 4) and cross rails (5, 6), heating elements (7) which include elements made of electrically condu... | 04/22/2008 |
| 7342329 | Power supply for electrical domestic appliances and domestic appliances for co-action with such a power supply The invention relates to a power supply for electrical domestic appliances, comprising: at least one connection to the mains electricity supply, and at least one connector for releasable electrical coupling of the power supply to a domestic appliance, wherein the po... | 03/11/2008 |
| 7335855 | Electric PCB heating component, electronic circuit board and heating method An electric PCB heating component for a heating electric component is coupleable to an electronic circuit board. The PCB heating component includes a fastening element, a heating element for generating thermal energy, and a heating body. The heating body emits therm... | 02/26/2008 |
| 7332693 | Tube and method for bracing functional elements in the same Functional elements, particularly PTC heating elements, are braced in a hollow reception means, such as a profile tube. The reception means have two at least partly concave top wall areas facing one anther and flat sides of the functional elements and in this way pe... | 02/19/2008 |
| 7326887 | Modified reset motor protector A self-hold motor protector (10) has an open metallic housing (12) in which a thermostatic disc (14) carrying a movable electrical contact (18) is cantilever mounted. A heater seat plate (20) is mounted in the housing in electrical... | 02/05/2008 |
| RE39946 | Conductive polymer compositions containing N-N-M-phenylenedimaleimide and devices The invention provides polymeric PTC compositions and electrical PTC devices with a high voltage capability and improved electrical stability. The polymeric PTC compositions are readily blended and generally do not require cross-linking, particularly radiation induc... | 12/25/2007 |
| 7282678 | Electric heating module An electric heating module includes an electric heater (10), a heat pipe (20) having an evaporating section (22) thermally attached to the electric heater and a condensing section (24), and at least one heat radiator (30, 40) therm... | 10/16/2007 |
| 7256371 | Temperature control method for positive temperature coefficient type heating element A controller adapted to control the temperature of a heating elements with a wide range of positive temperature coefficient of resistance, including very low values, using a sensor in line with the heating element. The controller is able to take account of non-const... | 08/14/2007 |
| 7230213 | Modular heated cover The modular heated cover is disclosed with a first pliable outer layer and a second pliable outer layer, wherein the outer layers provide durable protection in an outdoor environment, an electrical heating element between the first and the second outer layers, the e... | 06/12/2007 |
| 7230211 | Electrical heating element An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially incre... | 06/12/2007 |
| 7214906 | Heated hand grip control An apparatus for the independent control of the amount of heat produced by a right and a left side heated hand grip includes a control panel with various input buttons and a pair of LEDS that each indicates a relative power setting of one of the heated hand grips. A... | 05/08/2007 |
| 7183524 | Modular heated cover The modular heated cover is disclosed with a first pliable outer layer and a second pliable outer layer, wherein the outer layers provide durable protection in an outdoor environment, an electrical heating element between the first and the second outer layers, the e... | 02/27/2007 |
| 7138611 | Heating structure and its temperature control method A heating structure and its temperature control method having therein a heat generating line and a controller. The heat generating line includes a PTC element and a short circuit line serially connected having an insulating fusible layer separating them. When a user... | 11/21/2006 |
| 7031132 | Short circuit diagnostic tool A device and method for diagnosing shorts and fault conditions in electrical circuits such as heating, ventilation, and air conditioning (HVAC) control circuits. The device includes a positive temperature coefficient (PTC) member to protect the electrical circuit fr... | 04/18/2006 |
| 7002111 | Electric warmer with a current sensor The present invention relates to an electric warmer for heating a container by means of a heat transfer medium. The warmer comprises a jar into which the container can be inserted for heating, and an electric heating device comprising at least one resistance heating... | 02/21/2006 |
| 7002114 | Methods and apparatus for a variable resistor configured to compensate for non-linearities in a heating element circuit An improved variable resistor at least partially compensates for non-linearities in an electrical circuit containing a heating element, for example, a thin-film heating element. A controllable heater includes a heating element, a voltage source (for example, a stand... | 02/21/2006 |
| 6940048 | Radiant electric heater incorporating a temperature sensor assembly A radiant electric heater (2) is arranged for location underneath and against a cooking plate (12) and incorporates a heating element (14) spaced from the cooking plate and a temperature sensor assembly (26). The temperature sensor assembly (26) comprises a beam (28... | 09/06/2005 |
| 6933474 | Electronic power control for cooktop heaters A power control system for an electric cooktop. The power level is set by a knob connected to a potentiometer. Potentiometer information is digitally communicated by a controller over a serial communication bus to a power unit. The power unit communicates power leve... | 08/23/2005 |
| 6919540 | Heating element, liquid container and method for detecting temperature changes The invention relates to a heating element with at least one electrical resistance, wherein between a surface for heating and the electrical resistance is situated a dielectric, onto which dielectric connects an ammeter for detecting a leakage current. In addition, ... | 07/19/2005 |
| 6917019 | Heating and method for controlling heating of a functional unit on a motor vehicle Heating of a functional unit is started by a control device. An actual temperature or a parameter dependent on the actual temperature is monitored during, and optionally before and after the actual heating of the functional unit. A characteristic feature of the time... | 07/12/2005 |
| 6861622 | Negative temperature coefficient thermistor and method for manufacturing the same A negative temperature coefficient thermistor includes a thermistor element containing a transition metal oxide as a main component; internal electrodes disposed in the thermistor element; and external electrodes, electrically connected to the internal electrodes. A... | 03/01/2005 |
| 6852955 | Adhesive composition for electrical PTC heating device The invention relates to an electrically and thermally conductive adhesive composition for cementing together at least one metallized (e.g. aluminized or silvered) surface of a positive temperature coefficient (PTC) element to at least one metallic (e.g. aluminum) e... | 02/08/2005 |
| 6844524 | Heated cycle grip with temperature control An electrically powered resistance heating handgrip includes a control circuit located within a hollow core that fits coaxially within the open end of a handlebar of a motorcycle or snowmobile. The control circuit is mounted on a thin, narrow, elongated printed circ... | 01/18/2005 |
| 6753508 | Heating apparatus and heating method A heating apparatus includes a central hot plate for heating the center portion of a substrate, a plurality of segment hot plates for heating the peripheral portion of the substrate, a hot plate support member supporting the central hot plate and the segment hot pla... | 06/22/2004 |
| 6720536 | Electric heating device An electric heating device including PTC heating elements which have electrode sheets arranged on both sides thereof. These electrode sheets supply power to the PTC heating elements and each having connected thereto radiator elements for emitting the heat generated ... | 04/13/2004 |
| 6667461 | Multiple load protection and control device An electrical device includes a package having an array of connections, a thermally conductive, electrically insulative substrate in the package, a plurality of polymeric positive temperature coefficient (PPTC) resistors in the package in thermal contact ... | 12/23/2003 |
| 6274852 | Conductive polymer compositions containing N-N-M-phenylenedimaleimide and devices The invention provides polymeric PTC compositions and electrical PTC devices with a high voltage capability and improved electrical stability. The polymeric PTC compositions are readily blended and generally do not require cross-linking, particularly radi... | 08/14/2001 |
| 6252209 | Adaptive temperature control circuit with PWM output An adaptive temperature control circuit includes a first circuit for producing an error signal representing the difference between a preset temperature and an actual temperature and a second circuit coupled to the first circuit for producing a pulse width... | 06/26/2001 |
| 6225610 | Use of PTC devices to protect insulated wires in electrical harnesses Use of PTC circuit protection devices in motor vehicle wiring systems. The devices can replace some or all of the fuses conventionally used. Preferred devices contain PTC conductive polymers. Because the PTC devices can be reset without physical access to... | 05/01/2001 |
| 6207938 | Resistive heating track with bridge fuse An electrical resistance or heater includes an electrical resistive track provided on an insulating substrate. Two predetermined sections of the track have a predetermined current carrying capacity and are bridged by a glass, ceramic, or glass ceramic mat... | 03/27/2001 |
| 6147330 | PTC thermistor elements and heating devices incorporating same A PTC thermistor element for a heating device has a main body of a layered structure having a thinner layer and a thicker layer, sandwiched between electrodes formed on the main outer surfaces facing away from each other. The thinner layer has a thickness... | 11/14/2000 |
| 5995711 | Heating heat exchanger with electric heat emitter A heat-exchanging core portion includes a plurality of tubes arranged in parallel and a plurality of fin members disposed between a pair of adjacent tubes. While an electric heat emitting unit is constructed by supporting a heat emitting body including a ... | 11/30/1999 |
| 5928547 | High power current limiting polymer devices for circuit breaker applications A novel multi-layer current limiting PTC polymer device comprising at least two layers of a conductive polymer composition with electrodes attached thereto characterized by having a low contact resistance and a method of producing the same. The invention ... | 07/27/1999 |
| 5922231 | Voltage surge resistant positive temperature coefficient heater The invention is directed to a positive temperature coefficient heater. A pair of electrical conductors are connected to a positive temperature coefficient body at respective locations. A dielectric material is attached to the body between the conductors ... | 07/13/1999 |
| 5911898 | Method and apparatus for providing multiple autoregulated temperatures The present invention generally relates to use of constant current power supply to control temperatures of a device to plural Curie temperatures, without sacrificing the precision and uniformity of temperature achieved in the known devices. In accordance ... | 06/15/1999 |
| 5889260 | Electrical PTC heating device An electrical heating device employing positive temperature coefficient (PTC) thermistors as heating elements, which provides direct contact between the thermistor heating elements and the radiation units on both sides with no intervening members and whic... | 03/30/1999 |
| 5841111 | Low resistance electrical interface for current limiting polymers by plasma processing A novel current limiting PTC polymer device comprising a conductive polymer composition with electrodes attached thereto characterized by having a low contact resistance and a method of producing the same. The invention provides for the selective treatmen... | 11/24/1998 |
| 5831251 | Heater unit having increased dielectric strength A heater unit 1 has a plurality of flat heaters 11 adjacently arranged side by side and having common upper and lower surfaces. The thickness T of the heaters 11 is substantially uniform. Each heater 11 has an adjacent end surface 111 which faces toward a... | 11/03/1998 |
| 5814791 | Electrical apparatus with a variable circuit protection device An electrical assembly (10) comprising a first electrical device (12) comprised of a non-linear resistant, temperature responsive element (14) and first and second electrodes (16,18), the device (12) being connectable to a first power supply (20) such tha... | 09/29/1998 |
