Patents by Inventor Christopher Rouverand
Christopher Rouverand has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6919709Abstract: A battery charger has a particularly advantageous application in the field of mobile radio terminal batteries. The charger generates an output voltage and an output current for charging a battery and includes a first regulator, a second regulator for regulating the output voltage to a predetermined value, a detector for detecting the output current, and an activation system which assumes at least two states. In a first state it activates the first regulator when the detector detects a negative or positive output current, and in a second state it activates the second regulator when the detector means detect a substantially zero output current.Type: GrantFiled: July 9, 2003Date of Patent: July 19, 2005Assignee: AlcatelInventors: Christophe Rouverand, Vincent Lomba
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Publication number: 20050024024Abstract: A voltage regulator for an electronic device, the regulator supplying a regulated output voltage from an input voltage, the output voltage being applied to an electronic subsystem of the electronic device adapted to be supplied with power, said regulator comprising a controller receiving the input voltage, a capacitor situated at the output of the regulator and adapted to be charged periodically by the input voltage and periodically to supply its charge to the electronic subsystem of the electronic device when said electronic subsystem requires to be supplied with power, the capacitor being connected in parallel with a feedback network for sampling a portion of the output voltage and supplying a measured value of the output voltage to the controller, the feedback network comprising at least two transistors, a voltage comparator, and a switch situated between the output of the comparator and the input of the controller, which voltage regulator is characterized in that a switch is inserted into the feedback netType: ApplicationFiled: December 24, 2002Publication date: February 3, 2005Inventors: Vincent Lomba, Christophe Rouverand
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Publication number: 20040012372Abstract: A battery charger has a particularly advantageous application in the field of mobile radio terminal batteries. The charger generates an output voltage and an output current for charging a battery and includes a first regulator, a second regulator for regulating the output voltage to a predetermined value, a detector for detecting the output current, and an activation system which assumes at least two states. In a first state it activates the first regulator when the detector detects a negative or positive output current, and in a second state it activates the second regulator when the detector means detect a substantially zero output current.Type: ApplicationFiled: July 9, 2003Publication date: January 22, 2004Applicant: ALCATELInventors: Christophe Rouverand, Vincent Lomba
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Patent number: 6660421Abstract: A system for storing fuel in a handheld device that has a housing (11) made up of a set of pieces that define a receptacle inside which are housed a plurality of electronic circuits (23) and a fuel cell stack. The fuel cell stack transforms the chemical energy stored by a fuel into electrical energy so that fuel is contained in a container suitable for occupying a free space (22) between the electronic circuits (23) and the housing (11).Type: GrantFiled: July 23, 2001Date of Patent: December 9, 2003Assignee: AlcatelInventors: Piedad Gemma Merín Celemín, Carlos Quiñones De La Guia, Mauel Vázquez López, Christopher Rouverand, Jean Marc Bertelli
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Patent number: 6552446Abstract: To solve a problem due to a transient regulation phenomenon (6) at the time of an increase in power demand (1) in a mobile telephone, the regulator is pre-compensated (7) at a time (T′) in advance of a predicted time (T) of the increase in electrical power demand in the mobile telephone. As a result, a power supply voltage (Vr) crossing an operating threshold (3) outside a period of use has no harmful effect on the operation of the mobile appliance.Type: GrantFiled: December 15, 2000Date of Patent: April 22, 2003Assignee: AlcatelInventors: Vincent Lomba, Christophe Rouverand
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Patent number: 6388428Abstract: A method of charging a battery in which the end of charging is determined by detecting variations in the battery temperature includes the following steps: entering a charging mode, periodically measuring the battery temperature, measuring the variation in the battery temperature per unit time, comparing the battery temperature variation per unit time to a first threshold corresponding to variation of the ambient temperature and the battery temperature, and in this case terminating the charging mode, and to variation of only the ambient temperature, and in this case comparing the battery temperature variation per unit time to a second threshold corresponding to variation of only the battery temperature and terminating the charging mode.Type: GrantFiled: August 30, 2001Date of Patent: May 14, 2002Assignee: AlcatelInventors: Christophe Rouverand, Vincent Lomba
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Publication number: 20020050808Abstract: Device (11) suitable for charging an electric energy storage means incorporated in a handheld apparatus, without it being necessary, for carrying out the charging operation, to electrically connect said device (11) suitable for charging to a source of electric power.Type: ApplicationFiled: November 1, 2001Publication date: May 2, 2002Applicant: ALCATELInventors: Carlos Quinones De La Guia, Piedad Gemma Merin Celemin, Manuel Vazquez Lopez, Christopher Rouverand, Jean Marc Bertelli
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Publication number: 20020024321Abstract: A method of charging a battery in which the end of charging is determined by detecting variations in the battery temperature includes the following steps: entering a charging mode, periodically measuring the battery temperature, measuring the variation in the battery temperature per unit time, comparing the battery temperature variation per unit time to a first threshold corresponding to variation of the ambient temperature and the battery temperature, and in this case terminating the charging mode, and to variation of only the ambient temperature, and in this case comparing the battery temperature variation per unit time to a second threshold corresponding to variation of only the battery temperature and terminating the charging mode.Type: ApplicationFiled: August 30, 2001Publication date: February 28, 2002Applicant: ALCATELInventors: Christophe Rouverand, Vincent Lomba
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Publication number: 20020018925Abstract: System for storing fuel in a handheld device that has a housing (11) made up of a set of pieces that define a receptacle inside which are housed a plurality of electronic circuits (23) and a fuel cell stack.Type: ApplicationFiled: July 23, 2001Publication date: February 14, 2002Applicant: ALCATELInventors: Piedad Gemma Merin Celemin, Carlos Quinones De La Guia, Mauel Vazquez Lopez, Christopher Rouverand, Jean Marc Bertelli
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Patent number: 5563494Abstract: A method of monitoring rapid charging of sealed nickel storage cells of the nickel-hydride type and of the nickel-cadmium type, said cells optionally being associated in a battery, wherein once said cells have been identified and a relationship for the heating of said cells as a function of charging time for a given charging mode has been determined and stored, the charging of said cells is stopped when the difference between the temperature of said cells and a reference temperature exceeds a predetermined value, the reference temperature being calculated on the basis of said heating relationship and as a function of the charging time that has already elapsed.Type: GrantFiled: June 3, 1993Date of Patent: October 8, 1996Assignee: SaftInventors: Rosendo Cuesta, Christophe Rouverand