Patents by Inventor Dezhong Yang
Dezhong Yang 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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Publication number: 20150123615Abstract: A lithium battery pack according to the present invention has inherent information stored therein, which may include a nominal voltage, maximal voltage of the cells, range of temperature etc. A charging control signal is determined by a charging controller based on an identified state of the cells and the inherent information, and is transmitted to an electrical charging device. A controlled module in the charging device receives the charging control signal through and adjusts an output current to an accurate charging voltage for the current state of the battery pack.Type: ApplicationFiled: January 8, 2015Publication date: May 7, 2015Inventor: Dezhong Yang
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Patent number: 9024549Abstract: An over-temperature protection circuit for a direct current (DC) electric tool includes a current detecting circuit electrically coupled to a battery pack, a power device control circuit electrically coupled to an electric motor of the DC electric tool and a power device for controlling the power state of the circuit. A computation control circuit controls the power supply of the motor according to the circuit current value detected by the current detecting circuit. When the electric motor is not in a speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset first current value. When the electric motor is in the speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset second current value less than the first current value.Type: GrantFiled: September 26, 2011Date of Patent: May 5, 2015Assignee: Chervon (HK) LimitedInventors: Pingbo Shi, Dezhong Yang
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Patent number: 8963496Abstract: A lithium battery pack according to the present invention has inherent information stored therein, which comprises a plurality of cells, nominal voltage, maximal voltage of the cells, range of temperature etc. A charging parameter is determined by a charging controller based on an identified data of the cells and the inherent information, and is transmitted to an adapter. A controlled module in the adapter receives the charging parameter through a control terminal and adjusts an AC/DC circuit to output a current with accurate charging voltage to the battery pack.Type: GrantFiled: November 21, 2007Date of Patent: February 24, 2015Assignee: Chervon Intellectual Property LimitedInventor: Dezhong Yang
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Patent number: 8963497Abstract: A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. The ratio of the discharging time to the charging time is approximately 25:35.Type: GrantFiled: February 27, 2012Date of Patent: February 24, 2015Assignee: Chervon (HK) LimitedInventors: Dezhong Yang, Qichun Zhang, Haishen Xu, Junya Duan, Hao Du
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Publication number: 20140370354Abstract: A battery pack includes a phase change material, which implements temperature management of the battery pack by virtue of the heat dissipation action of the phase change material. The battery pack includes a plurality of battery cells, at least one of which is partially provided with a phase change material and brackets for supporting the plurality of battery cells. The phase change material is disposed at the maximum heat dissipating region of the battery cell, and the maximum heat dissipating region is a region partially extending from an intermediate position of the outer surface of the battery cell towards a positive pole end.Type: ApplicationFiled: June 12, 2014Publication date: December 18, 2014Inventors: Dezhong Yang, Yuexiang Zhang, Jianjun Shuang, Hao Du
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Patent number: 8841871Abstract: The present application discloses a control circuit for a power tool and a method for manipulating the power tool. The control circuit has a detection circuit for battery packs, a calculating control circuit, a battery capacity indicating circuit for indicating the calculation result of the battery capacity, and a current measure and calculating circuit for measuring the current flowing through motors. The calculation result further includes the voltages consumed by the battery pack internally and the discharge loop. The method for manipulating the power tool includes pressing the switch to electrically connect the motor and the battery pack, measuring the parameters of the battery pack and allowing the motor to operate or not according the measured parameters. Further, after the motor is in operation, the battery capacity is calculated and the results are displayed.Type: GrantFiled: June 7, 2011Date of Patent: September 23, 2014Assignee: Chervon (HK) LimitedInventors: Dezhong Yang, Zheng Geng
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Publication number: 20130270476Abstract: A composite phase change material and the method for forming the material is disclosed herein. thereof, especially a composite phase change material for lithium battery cooling, comprising polyethylene glycol, silica vehicle and composite flame retardant comprising graphite and polymer, wherein the weight ratio of the graphite and polymer is approximately 1:2. The composite phase change material according to the invention has a good stability and a thermal conductivity, a small corrosivity, a high phase transition enthalpy of 150-350 J/g, and a morphological stability during phase change. Moreover, addition of high thermal conductivity material and composite flame retardant ensures good thermal conductivity and excellent flame retardant effect of the phase change material.Type: ApplicationFiled: April 11, 2013Publication date: October 17, 2013Applicant: Chervon (HK) LimitedInventors: Dezhong Yang, Hao Du, Jianjun Shuang
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Patent number: 8432535Abstract: A device for optoelectronic distance measurement includes an emitter having a first end for emitting a measuring beam to an object to be measured and a second end, a receiver for receiving the measuring beam reflected or dispersed back from the object to be measured and for converting it to a measurement signal, a signal processing device for filtering the measurement signal and a reference signal, and a control and analysis device for analyzing the information of the measurement signal and the reference signal so as to determine the distance from the object to be measured. The second end of the emitter is used to emit a reference beam which is received by the receiver and converted to form the reference signal.Type: GrantFiled: August 31, 2010Date of Patent: April 30, 2013Assignee: Chervon LimitedInventor: Dezhong Yang
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Patent number: 8400114Abstract: A DC power tool having an interiorly provided lithium battery element and a charging switch includes a safety protection module to eliminate the risk of circuitry burn-out and other dangers resulting from connecting the power tool to a power supply with unmatched rated voltage and rated current when charging the power tool via use of an adapter.Type: GrantFiled: July 13, 2010Date of Patent: March 19, 2013Assignee: Chervon LimitedInventors: Dezhong Yang, Junya Duan
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Publication number: 20130057845Abstract: A control and switch device for an inner light path of a meter distance meter includes: a generating device for emitting a polarized light; a liquid crystal box for deflecting the polarized light emitted from the generating device; a transparent medium positioned near the Brewster's angle formed by an emergent light emitted from the liquid crystal box; and a polarizer positioned in the direction of an emergent light emitted from the transparent medium.Type: ApplicationFiled: August 31, 2012Publication date: March 7, 2013Applicant: CHERVON (HK) LIMITEDInventors: Dezhong Yang, Yangjian Xu
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Publication number: 20120227994Abstract: A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. The ratio of the discharging time to the charging time is approximately 25:35.Type: ApplicationFiled: February 27, 2012Publication date: September 13, 2012Applicant: CHERVON (HK) LIMITEDInventors: Dezhong Yang, Qichun Zhang, Haishen Xu, Junya Duan, Hao Du
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Publication number: 20120098495Abstract: The present application provides a charging system having a charger and a battery. The charging system provides a quick-charging mode and a normal-charging mode. The quick-charging mode may be activated to charge the battery if certain conditions are met and the charging system may also have an indicating device for indicating when the quick-charging mode is finished. More specifically, the charger of the present application provides selective charging modes and provides an ultra-quick charging solution which may be controlled by the changes in the temperature of the battery and which can increase the charging power to quickly provide enough energy to finish a work task.Type: ApplicationFiled: August 10, 2011Publication date: April 26, 2012Inventors: Dezhong Yang, Nanfei Wu, Junya Duan
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Publication number: 20120074877Abstract: An over-temperature protection circuit for a direct current (DC) electric tool includes a current detecting circuit electrically coupled to a battery pack, a power device control circuit electrically coupled to an electric motor of the DC electric tool and a power device for controlling the power state of the circuit. A computation control circuit controls the power supply of the motor according to the circuit current value detected by the current detecting circuit. When the electric motor is not in a speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset first current value. When the electric motor is in the speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset second current value less than the first current value.Type: ApplicationFiled: September 26, 2011Publication date: March 29, 2012Applicant: CHERVON (HK) LIMITEDInventors: Pingbo Shi, Dezhong Yang
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Patent number: 8089618Abstract: The laser distance measuring device of the present invention comprises an emitting part having a laser generating device with a first spectral bandwidth arranged on an emitting optical path and a collimating lens. The emitting part also has an optical filter with a second spectral bandwidth which is less than the first spectral bandwidth. The laser distance measuring device also has a receiving part having a photoelectric receiving and conversion device to receive the measuring beam reflected by the object to be measured and convert it into an electric signal. Using the optical filter, most of the unneeded portions of the laser beam emitted from the laser are filtered out so that the useful proportion of the measuring beam of the laser beam is improved and the ranging capability of the laser distance measuring device under a bright or strong light environment is enhanced.Type: GrantFiled: November 6, 2009Date of Patent: January 3, 2012Assignee: Chervon LimitedInventor: Dezhong Yang
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Publication number: 20110304287Abstract: The present application discloses a control circuit for a power tool and a method for manipulating the power tool. The control circuit has a detection circuit for battery packs, a calculating control circuit, a battery capacity indicating circuit for indicating the calculation result of the battery capacity, and a current measure and calculating circuit for measuring the current flowing through motors. The calculation result further includes the voltages consumed by the battery pack internally and the discharge loop. The method for manipulating the power tool includes pressing the switch to electrically connect the motor and the battery pack, measuring the parameters of the battery pack and allowing the motor to operate or not according the measured parameters. Further, after the motor is in operation, the battery capacity is calculated and the results are displayed.Type: ApplicationFiled: June 7, 2011Publication date: December 15, 2011Inventors: Dezhong Yang, Zheng Geng
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Publication number: 20110307201Abstract: The present invention discloses a battery capacity display circuit for a power tool. The battery capacity display circuit has a first circuit module arranged in the battery pack of the power tool for detecting and displaying the battery capacity and a second circuit module arranged in the power tool for displaying the battery capacity. The battery capacity display also has an optical signal transmitting device and an optical signal receiving device to communicate with the first circuit module and the second circuit module.Type: ApplicationFiled: June 7, 2011Publication date: December 15, 2011Inventors: Dezhong Yang, Zheng Geng
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Publication number: 20110196516Abstract: A safety system for a garage door movable along a door frame is used to detect an obstacle. The safety system includes a motor device for opening and closing the garage door, a control circuit for controlling the motor to open and close the door, a light emitting device for emitting a light, a light receiving device in communication with the control circuit for receiving the light, wherein the light emitting device and the light receiving device are to be mounted on one side of the door frame, and an optical reflecting device for mounting on the other side of the door frame opposite to the light emitting device and the light receiving device whereby the light receiving device will receive light emitted from the light emitting device and reflected by the optical reflecting device.Type: ApplicationFiled: January 28, 2011Publication date: August 11, 2011Applicant: CHERVON (HK) LIMITEDInventors: Dezhong Yang, Wu Chen
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Publication number: 20110051122Abstract: A device for optoelectronic distance measurement includes an emitter having a first end for emitting a measuring beam to an object to be measured and a second end, a receiver for receiving the measuring beam reflected or dispersed back from the object to be measured and for converting it to a measurement signal, a signal processing device for filtering the measurement signal and a reference signal, and a control and analysis device for analyzing the information of the measurement signal and the reference signal so as to determine the distance from the object to be measured. The second end of the emitter is used to emit a reference beam which is received by the receiver and converted to form the reference signal.Type: ApplicationFiled: August 31, 2010Publication date: March 3, 2011Applicant: CHERVON LIMITEDInventor: Dezhong Yang
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Publication number: 20110012564Abstract: A DC power tool having an interiorly provided lithium battery element and a charging switch includes a safety protection module to eliminate the risk of circuitry burn-out and other dangers resulting from connecting the power tool to a power supply with unmatched rated voltage and rated current when charging the power tool via use of an adapter.Type: ApplicationFiled: July 13, 2010Publication date: January 20, 2011Applicant: CHERVON LIMITEDInventors: Dezhong Yang, Junya Duan
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Publication number: 20100308776Abstract: A charger for lithium battery pack has a voltage input terminal, a current control module and a voltage output terminal including a voltage-rising module and a voltage-detecting module connected with the voltage-rising module and the voltage input terminal.Type: ApplicationFiled: May 28, 2010Publication date: December 9, 2010Applicant: CHERVON LIMITEDInventors: Dezhong Yang, Nanfei Wu