Patents by Inventor Baofeng Fan
Baofeng Fan 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: 20250025990Abstract: An impact tool includes: an impact mechanism, where the impact mechanism includes an impact block driven by a drive shaft and a hammer anvil receiving an impact from the impact block, and the hammer anvil is connected to an output shaft; and a controller configured to control an electric motor. The controller is configured to, when the impact tool is in a low-speed mode and it is detected that the impact mechanism applies an impact force to the output shaft, perform the operations periodically: determining that the impact mechanism impacts a preset number of times and controlling the electric motor to shut down for a preset period and then restart.Type: ApplicationFiled: July 17, 2024Publication date: January 23, 2025Inventors: Chenwei Sun, Jian Yu, Baofeng Fan, Jia Gou, Rui Xu
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Publication number: 20240413649Abstract: A power tool includes a power tool body. The power tool body is configured to be adapted to at least a first battery pack having a first nominal voltage and a first output terminal set and a second battery pack having a second nominal voltage and a second output terminal set, where the first nominal voltage is different from the second nominal voltage. The power tool body includes a first input terminal set configured to be selectively electrically connected to one of the first output terminal set and the second output terminal set to supply power to the power tool body.Type: ApplicationFiled: August 19, 2024Publication date: December 12, 2024Inventors: Peiyong Li, Baofeng Fan, Qingqing Pei, Changwei Zuo, Shubin Tong, Min Zhu, Guillaume Keller
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Patent number: 12062999Abstract: A method for controlling a rotational speed of an electric tool includes starting a motor and controlling the motor to operate at a constant speed which is a preset rotational speed in response to determining that a motor of the electric tool is in a preset low-speed mode, increasing output torque until the motor runs in response to a rotor of the motor being locked, and controlling, based on a relationship between a current rotational speed of the motor and the preset rotational speed, the motor to operate at a constant speed. In this manner, the problem where a rotor is easily locked when the electric tool runs in a low-speed mode in the related art is solved and the electric tool can adaptively adjust an output rotational speed of the motor according to the load condition.Type: GrantFiled: March 16, 2021Date of Patent: August 13, 2024Assignee: Nanjing Chervon Industry Co., Ltd.Inventor: Baofeng Fan
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Publication number: 20240217077Abstract: An impact tool includes a controller for controlling a motor. The controller is configured to, when the direction of rotation of the motor is set to the reverse rotation direction, a drive shaft rotates at a first speed, and after an impact mechanism applies an impact force to an output shaft for a preset time, determine that a fastener is in a tightened state according to a load parameter of the output shaft and control the drive shaft to rotate at a second speed, where the second speed is greater than the first speed.Type: ApplicationFiled: October 26, 2023Publication date: July 4, 2024Inventors: Shuai Chen, Hongtao Ke, Yongkang Wu, Chenwei Sun, Baofeng Fan, Rui Xu, Meng Xue, Shubin Tong, Di Wu, Jia Gou
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Publication number: 20230352951Abstract: A power tool includes a power tool body. The power tool body is configured to be adapted to at least a first battery pack having a first nominal voltage and a first output terminal set and a second battery pack having a second nominal voltage and a second output terminal set, where the first nominal voltage is different from the second nominal voltage. The power tool body includes a first input terminal set configured to be selectively electrically connected to one of the first output terminal set and the second output terminal set to supply power to the power tool body.Type: ApplicationFiled: March 22, 2023Publication date: November 2, 2023Inventors: Peiyong Li, Baofeng Fan, Qingqing Pei, Changwei Zuo, Shubin Tong, Min Zhu, Guillaume Keller
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Patent number: 11626820Abstract: A rotary impact tool includes an impact assembly, a brushless motor, a transmission assembly, a drive circuitry, and a controller. The controller is configured to acquire a commutation interval of the brushless motor, output a first control signal to the drive circuitry causing the brushless motor to operate at a preset initial speed, and output a second control signal to the drive circuitry to gradually increase a rotational speed of the brushless motor to a preset final speed, when a commutation interval of the brushless motor becomes greater than or equal to a preset time threshold, where the preset initial speed is less than the preset final speed.Type: GrantFiled: October 22, 2019Date of Patent: April 11, 2023Assignee: Nanjing Chervon Industry Co., Ltd.Inventors: Lianghua Ni, Baofeng Fan
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Publication number: 20230086452Abstract: A torque output tool includes an operating mechanism, a load determination device, an operation amount determination device, and a control mechanism. The operating mechanism is used for a user to operate. The load determination device is used for determining a load. The operation amount determination device is used for determining a current operation amount of an operation mechanism. The control mechanism is used for increasing a rotational speed of a motor in the case where the load gradually increases and the current operation amount is unchanged.Type: ApplicationFiled: August 23, 2022Publication date: March 23, 2023Inventor: Baofeng Fan
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Publication number: 20230051358Abstract: A power tool includes a casing, a cutting unit, a transmission device, and a toggle switch. The casing includes a support portion. The cutting unit is used for cutting a target object and moving between a first position and a second position relative to the support portion. The toggle switch includes at least a third position and a fourth position. When the toggle switch is at the third position, the cutting unit performs a first motion: the cutting unit moves from the second position to the first position. When the toggle switch is at the fourth position, the cutting unit performs a second motion: the cutting unit moves from the first position to the second position. A speed at which the cutting unit performs the second motion is greater than a speed at which the cutting unit performs the first motion.Type: ApplicationFiled: August 2, 2022Publication date: February 16, 2023Inventors: Shichun TAO, Lai LIU, Lianghua Ni, Baofeng Fan
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Patent number: 11313521Abstract: A portable lighting device includes a lighting assembly, a switch assembly, a control module, a power supply, a power recognition circuit, and a power conversion circuit. The control module is configured to control the lighting assembly to light up according to an indication of the switch assembly. The power supply is used for supplying power to the lighting assembly and includes a battery pack and an external power supply. The power conversion circuit is used for converting a power of the power supply into a power output adapted to the lighting assembly and the control module. The power recognition circuit is configured to selectively output the power of the battery pack or the power of the external power supply to the power conversion circuit.Type: GrantFiled: June 2, 2021Date of Patent: April 26, 2022Assignee: Nanjing Chervon Industry Co., Ltd.Inventors: Peiyong Li, Baofeng Fan, Liangliang Hu, Min Zhu
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Publication number: 20210388954Abstract: A portable lighting device includes a lighting assembly, a switch assembly, a control module, a power supply, a power recognition circuit, and a power conversion circuit. The control module is configured to control the lighting assembly to light up according to an indication of the switch assembly. The power supply is used for supplying power to the lighting assembly and includes a battery pack and an external power supply. The power conversion circuit is used for converting a power of the power supply into a power output adapted to the lighting assembly and the control module. The power recognition circuit is configured to selectively output the power of the battery pack or the power of the external power supply to the power conversion circuit.Type: ApplicationFiled: June 2, 2021Publication date: December 16, 2021Inventors: Peiyong Li, Baofeng Fan, Liangliang Hu, Min Zhu
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Publication number: 20210313909Abstract: A method for controlling a rotational speed of an electric tool includes starting a motor and controlling the motor to operate at a constant speed which is a preset rotational speed in response to determining that a motor of the electric tool is in a preset low-speed mode, increasing output torque until the motor runs in response to a rotor of the motor being locked, and controlling, based on a relationship between a current rotational speed of the motor and the preset rotational speed, the motor to operate at a constant speed. In this manner, the problem where a rotor is easily locked when the electric tool runs in a low-speed mode in the related art is solved and the electric tool can adaptively adjust an output rotational speed of the motor according to the load condition.Type: ApplicationFiled: March 16, 2021Publication date: October 7, 2021Inventor: Baofeng Fan
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Publication number: 20200161994Abstract: A rotary impact tool includes an impact assembly, a brushless motor, a transmission assembly, a drive circuitry, and a controller. The controller is configured to acquire a commutation interval of the brushless motor, output a first control signal to the drive circuitry causing the brushless motor to operate at a preset initial speed, and output a second control signal to the drive circuitry to gradually increase a rotational speed of the brushless motor to a preset final speed, when a commutation interval of the brushless motor becomes greater than or equal to a preset time threshold, where the preset initial speed is less than the preset final speed.Type: ApplicationFiled: October 22, 2019Publication date: May 21, 2020Inventors: Lianghua Ni, Baofeng Fan