Patents Assigned to FRIWO Gerätebau GmbH
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Patent number: 10390449Abstract: The present invention relates to an electrical device for rail mounting. Such electrical devices are mounted in use in a side-by-side relationship on a carrier rail. An electrical device for rail mounting comprises a housing having a rail receiving recess therein, at least one edge of said recess being defined by an end region of a latch member that is movable relative to the housing in a direction transverse to the recess, and resilient means biasing the latch member to move in a direction to reduce the width of said recess. Said resilient means comprise a torsion spring having a first leg and a second leg deflectable around a hinge region, said first leg resting against a protrusion of the housing, and said second leg resting against the latch member.Type: GrantFiled: February 16, 2017Date of Patent: August 20, 2019Assignee: FRIWO Gerätebau GmbHInventor: Weihua Jiang
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Patent number: 10299399Abstract: The waterproof case includes a case body, which defines an inner space for accommodating an electrically functional component. The waterproof case includes at least one opening, and at least one plug, which is mounted in the opening to form a part of a wall of the inner space. The plug includes at least one terminal conduit forming a feedthrough for a terminal. The plug is arranged in the opening to form with the case body an external space, and the external space is filled with an electrically insulating material for sealing the waterproof case.Type: GrantFiled: November 30, 2016Date of Patent: May 21, 2019Assignee: FRIWO GERÄTEBAU GMBHInventors: Taner Yilmaz, Christopher Carsten Janse
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Patent number: 10270203Abstract: An adapter housing for waterproof mounting a power supply circuit to an exterior wall of an appliance. The wall has an opening for a plug to connect the socket. The adapter includes a front wall having a connecting area and a mounting area; and a sealing element connected to the front wall. The sealing element surrounds the connecting area and the mounting area. The front wall opens at the connecting area into a recess defining a socket for receiving a plug. The front wall enables a sealed mounting to an exterior wall of the appliance. A side wall, together with the front wall, defines a compartment for receiving a power supply circuit. The sealing element surrounds the connecting area and the mounting area on the front wall such that it seals the compartment from an opening of the exterior wall.Type: GrantFiled: June 6, 2018Date of Patent: April 23, 2019Assignee: FRIWO Gerätebau GmbHInventors: Christopher Janse, Jörg Wochnik
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Patent number: 10270214Abstract: A plug-in power supply for supplying a consumer with a low voltage and a plug-in power supply which in operation is configured as a power adapter unit with one of its matching interchangeable mains plug units. The power adapter unit comprises a housing; a voltage transformer module for converting a mains voltage into the required low voltage in the housing; an engaging seat, for the plug unit, at an inner side of the power adapter unit to be directed towards a mains socket, the plug unit being slidably connected with the engaging seat; at least two electric contacts in the seat connecting the transformer module with contacts at an inner side of the plug unit directed towards the power adapter unit; and a locking member, at a rear profile of the engaging seat which limits the sliding of the plug unit.Type: GrantFiled: April 24, 2018Date of Patent: April 23, 2019Assignee: FRIWO Gerätebau GmbHInventor: Weihua Jiang
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Patent number: 10116167Abstract: A power transmission device for inductive energy transfer. The power transmission device comprises a first stage adapted to be connected to a supply input voltage and adapted to convert the supply input voltage to an operating voltage. The power transmission device further includes a second stage comprising a resonant circuit connected to the first stage and adapted to generate an oscillating voltage from the operating voltage so as to generate a magnetic field for inductive transfer of energy from the power transmission device to a target device. A control circuit is connected to the second stage. The control circuit is adapted to detect a parameter value of the second stage and is adapted to start or stop amplification of the resonant circuit based on the detected parameter value.Type: GrantFiled: May 28, 2014Date of Patent: October 30, 2018Assignee: FRIWO Gerätebau GmbHInventor: Tobias Pomp-Melchers
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Patent number: 9985397Abstract: A plug-in power supply for supplying a consumer with a low voltage and a plug-in power supply which in operation is configured as a power adapter unit with one of its matching interchangeable mains plug units. The power adapter unit comprises a housing; a voltage transformer module for converting a mains voltage into the required low voltage in the housing; an engaging seat, for the plug unit, at an inner side of the power adapter unit to be directed towards a mains socket, the plug unit being slidably connected with the engaging seat; at least two electric contacts in the seat connecting the transformer module with contacts at an inner side of the plug unit directed towards the power adapter unit; and a locking member, at a rear profile of the engaging seat which limits the sliding of the plug unit.Type: GrantFiled: August 25, 2014Date of Patent: May 29, 2018Assignee: FRIWO Gerätebau GmbHInventor: Weihua Jiang
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Patent number: 9800147Abstract: The invention relates to a choke circuit and a bus power supply incorporating same. Such a coil choke circuit includes an inductor connected between a first input terminal and a first output terminal, a boost circuit connected between a second input terminal and a second output terminal for increasing the voltage level that is output by the second output terminal. A switching element is connected in parallel to the boost circuit for bypassing the boost circuit. Additionally, a comparator is connected between the first input terminal and the first output terminal for detecting a potential difference across the inductor; wherein in case the comparator detects a potential difference higher than a threshold, the switching element is controlled to be in an OFF state; and in case the comparator detects a potential difference lower than or equal to the threshold, the switching element is controlled to be in an ON state.Type: GrantFiled: May 12, 2014Date of Patent: October 24, 2017Assignee: FRIWO Gerätebau GmbHInventors: Andreas Hagemeyer, Ingolf Bonkhoff
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Publication number: 20140354065Abstract: A power transmission device for inductive energy transfer. The power transmission device comprises a first stage adapted to be connected to a supply input voltage and adapted to convert the supply input voltage to an operating voltage. The power transmission device further includes a second stage comprising a resonant circuit connected to the first stage and adapted to generate an oscillating voltage from the operating voltage so as to generate a magnetic field for inductive transfer of energy from the power transmission device to a target device. A control circuit is connected to the second stage. The control circuit is adapted to detect a parameter value of the second stage and is adapted to start or stop amplification of the resonant circuit based on the detected parameter value.Type: ApplicationFiled: May 28, 2014Publication date: December 4, 2014Applicant: FRIWO Gerätebau GmbHInventor: Tobias Pomp-Melchers
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Patent number: 8619413Abstract: A power supply unit is provided for supplying low voltage power. The supply unit includes at least one power plug contact connectable to a supply voltage; at least one output lead for outputting the low voltage; and a voltage transformer unit having at least one electronic component for transforming the supply voltage to the low voltage. The power supply unit includes a casing made of a casing base element and a lid element, such that the power plug contact is held in the casing base element or in the lid element in such a way that it can be plugged into a power socket. The voltage transformer unit is mounted on a circuit carrier which is arranged in the casing base element in such a way that a defined first region of the circuit carrier is received in a casting space filled with an electrically insulating casting compound.Type: GrantFiled: November 23, 2011Date of Patent: December 31, 2013Assignee: FRIWO Gerätebau GmbHInventors: Heinz-Jürgen Gausepohl, Taner Yilmaz
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Patent number: 7570013Abstract: A rechargeable battery pack (20), in particular, for use with electrical hand tool devices, comprises a first and a second charging connection (24, 26), and a third control connection (28), all three being connectable to a charging device (46) for producing a charging connection, and with a calculating means (30) which can be addressed via an interface circuit (32), wherein the interface circuit uses the third control connection (28). In order to prevent destruction of the rechargeable battery pack due to erroneous charging, a non-linear component (34) is disposed in the interface circuit (32) which, upon control of the interface circuit (32) by the charging device (46), can be distinguished from an NTC component, thereby permitting detection of the rechargeable battery type when the calculating means (30) provides no identification information in response to control by the charging device (46).Type: GrantFiled: September 18, 2006Date of Patent: August 4, 2009Assignees: Metabowerke GmbH, Friwo-Geraetebau GmbHInventors: Jochen Graeber, Georg Breuch
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Patent number: 7563115Abstract: A plug-in power supply wherein the mains plug unit is exchangeable in the form of a conversion plug system. The plug-in power supply includes a housing having a voltage transformer module for converting a mains voltage into the required low voltage, and an exchangeable mains plug unit with at least two mains plug pins. The plug-in power supply includes an exchangeable mains plug unit, and the housing includes at least two spring contacts which are electrically connected to the voltage transformer module. The mains plug unit includes at least two contact pins which cooperate with the spring contacts so as to establish an electric contact with the mains plug pins, and each contact pin is arranged in a separate recess.Type: GrantFiled: August 28, 2006Date of Patent: July 21, 2009Assignee: Friwo Geraetebau GmbHInventors: Kay van gen Hassend, Ulrich Bernsmann, Manfred Wegmann, Michael Bothe, Yonggui Wu
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Patent number: 7362075Abstract: The present invention relates to a battery charger for charging a battery. The present invention especially relates to a battery charger comprising a switching power supply controlled on the primary side and a charge monitoring circuit for monitoring the charge state of the battery. For providing an improved battery charger which allows a secure and reliable charging of batteries with a reduction of the circuit complexity, the costs for appliances and the construction size, the charge monitoring circuit is—according to the invention—disposed in the switching circuit on the primary side of the battery charger.Type: GrantFiled: June 7, 2005Date of Patent: April 22, 2008Assignee: Friwo Geraetebau GmbHInventors: Michael Bothe, Ralf Schroder gen. Berghegger, Georg Breuch
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Publication number: 20070069686Abstract: The invention concerns a rechargeable battery pack (20), in particular, for use with electrical hand tool devices, comprising a first and a second charging connection (24, 26), and a third control connection (28), all three being connectable to a charging device (46) for producing a charging connection, and with a calculating means (30) which can be addressed via an interface circuit (32), wherein the interface circuit uses the third control connection (28). In order to prevent destruction of the rechargeable battery pack due to erroneous charging, the invention proposes provision of a non-linear component (34) in the interface circuit (32) which, upon control of the interface circuit (32) by the charging device (46), can be distinguished from an NTC component, thereby permitting detection of the rechargeable battery type when the calculating means (30) provides no identification information in response to control by the charging device (46).Type: ApplicationFiled: September 18, 2006Publication date: March 29, 2007Applicants: Metabowerke GmbH, Friwo-Geraetebau GmbHInventors: Jochen Graeber, Georg Breuch
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Publication number: 20070047182Abstract: The present invention relates to a plug-in power supply for supplying a consumer with a low voltage, and in particular to a plug-in power supply wherein the mains plug unit is exchangeable in the form of a conversion plug system. The plug-in power supply comprises a housing having arranged therein a voltage transformer module for converting a mains voltage into the required low voltage, and an exchangeable mains plug unit with at least two mains plug pins.Type: ApplicationFiled: August 28, 2006Publication date: March 1, 2007Applicant: FRIWO GERAETEBAU GMBHInventors: Kay Hassend, Ulrich Bernsmann, Manfred Wegmann, Michael Bothe, Yonggui Wu
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Publication number: 20070001648Abstract: The present invention relates to a battery charger for charging a battery. The present invention especially relates to a battery charger comprising a switching power supply controlled on the primary side and a charge monitoring circuit for monitoring the charge state of the battery. For providing an improved battery charger which allows a secure and reliable charging of batteries with a reduction of the circuit complexity, the costs for appliances and the construction size, the charge monitoring circuit is—according to the invention—disposed in the switching circuit on the primary side of the battery charger.Type: ApplicationFiled: June 7, 2005Publication date: January 4, 2007Applicant: Friwo Geraetebau GmbHInventors: Michael Bothe, Ralf Berghegger, Georg Breuch
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Patent number: 7002785Abstract: A device for protecting the electronic circuitry of electrical appliances against damage from unacceptably high voltages. An element is interposed in the power supply paths which limits the application of an externally supplied excessive voltage to a predetermined time interval and which completely interrupts the current flow when the excessive voltage and current causes a heat build-up. This is accomplished by interposing pairs of spaced-apart solder surfaces at at least one point along the current paths to the electronic circuitry. One solder surface of each pair is connected to the power supply and the other to the power consumer. An element is soldered to the respective solder surfaces of the pairs and electrically closes the current path. A mechanically prestressed spring engages the element and reliably separates it from the solder surfaces when the solder melts due to excessive heating.Type: GrantFiled: February 13, 1997Date of Patent: February 21, 2006Assignees: FRIWO Geraetebau GmbH, VARTA AG, Siemens AGInventors: Michael Bothe, Armin Wegener, Juergen Heydecke, Ingmar Knop, Klaus Goebel, Klaus-Dieter Skwirblies, Rainer Peters
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Patent number: 6912137Abstract: The present invention relates to an inductive contactless power transmitter having a primary side including a first inductor (LP) on the primary side and an oscillator for producing an alternating signal which is supplied to the inductor (LP) on the primary side, and having a secondary side which includes an inductor on the secondary side that can be coupled to the inductor (LP) on the primary side, a load (RL) which is variable in time, and a detection means (42) for determining a power demand of the load on the secondary side, the first oscillator being a voltage-controlled oscillator having a frequency that is adjustable in response to the power demand determined by the detection means (42).Type: GrantFiled: November 28, 2002Date of Patent: June 28, 2005Assignee: Friwo Geraetebau GmbHInventor: Schroder Ralf gen Berghegger
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Patent number: 6906498Abstract: The present invention relates to a device and a method for the detection of a charging voltage of at least one rechargeable battery comprising a voltage converter for converting the charging voltage of the at least one rechargeable battery into a voltage signal, an analog/digital converter for converting the voltage signal of the voltage converter into a digital signal, and an evaluation and control device for evaluating the digital signal of the analog/digital converter as well as for controlling the charging process of the at least one rechargeable battery on the basis of the evaluation of the digital signal of the analog/digital converter. The voltage converter comprises an amplifier circuit with a variable gain controlled by at least one control output terminal of the evaluation and control device such that the gain applied for the generation of the voltage signal is adjusted to the input voltage range of the analog/digital converter according to a transfer function.Type: GrantFiled: April 14, 2003Date of Patent: June 14, 2005Assignee: Friwo Geraetebau GmbHInventors: Georg Breuch, Zbigniew Kubacki
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Patent number: 6781346Abstract: A charging system is used for contactless transfer of electric power from a charging unit to a mobile unit. The system includes a first substantially U-shaped ferrite core which is operable to be located within the charging unit. The first core includes a base area and two leg areas. Each leg area of the first core includes a pole face. A first winding is arranged on the base area of the first ferrite core. The system also includes a second substantially U-shaped ferrite core which is operable to be located within a mobile unit. The second core includes a base area and two leg areas. Each leg area of the second core includes a pole face. A second winding is arranged on the base area of the second ferrite core. The first ferrite core has larger cross-sectional dimensions than the second ferrite core.Type: GrantFiled: July 10, 2002Date of Patent: August 24, 2004Assignee: Friwo Geraetebau GmbHInventors: Arno Reinhard, Ralf gen.Berghegger Schröeder
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Publication number: 20030214268Abstract: The present invention relates to a device and a method for the detection of a charging voltage of at least one rechargeable battery comprising a voltage converter for converting the charging voltage of the at least one rechargeable battery into a voltage signal, an analog/digital converter for converting the voltage signal of the voltage converter into a digital signal, and an evaluation and control device for evaluating the digital signal of the analog/digital converter as well as for controlling the charging process of the at least one rechargeable battery on the basis of the evaluation of the digital signal of the analog/digital converter. The voltage converter comprises an amplifier circuit with a variable gain controlled by at least one control output terminal of the evaluation and control device such that the gain applied for the generation of the voltage signal is adjusted to the input voltage range of the analog/digital converter according to a transfer function.Type: ApplicationFiled: April 14, 2003Publication date: November 20, 2003Applicant: FRIWO GERAETEBAU GMBHInventors: Georg Breuch, Zbigniew Kubacki