Patents by Inventor Weifeng Li

Weifeng Li 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).

  • Publication number: 20210185427
    Abstract: Embodiments of active noise control (ANC) headphones and operating methods thereof are disclosed herein. In one example, a headphone includes a speaker, an internal microphone, and a processor. The speaker is configured to play an audio of interest based on an audio source signal. The internal microphone is configured to obtain a mixed audio signal including a noise signal and the audio of interest played by the speaker. The processor is configured to determine a first current system parameter of the headphone based on the mixed audio signal at a first time point, and determine if the first current system parameter of the headphone is higher than a predetermined threshold to determine if the headphone is worn by a user.
    Type: Application
    Filed: January 18, 2021
    Publication date: June 17, 2021
    Applicant: BESTECHNIC (SHANGHAI) CO., LTD.
    Inventors: Weifeng Tong, Liang Zhang, Qian Li, Mingliang Xu
  • Publication number: 20210185426
    Abstract: Embodiments of active noise control (ANC) headphones and operating methods thereof are disclosed herein. In one example, a headphone for ANC includes a speaker, an internal microphone, a processor, and a filter function module. The speaker is configured to play an audio based on a first audio source signal. The internal microphone is configured to obtain a mixed audio signal comprising a noise signal and a second audio source signal based on the audio of interest played by the speaker. The processor is configured to determine a current system parameter of the ANC headphone based on the mixed audio signal at a first time point and determine a current parameter of a filter function module based on the current system parameter of the ANC headphone and pre-tested data. The filter function module is to perform ANC based on the determined current parameter of the filter function module.
    Type: Application
    Filed: October 12, 2020
    Publication date: June 17, 2021
    Applicant: BESTECHNIC (SHANGHAI) CO., LTD.
    Inventors: Weifeng Tong, Liang Zhang, Qian Li, Mingliang Xu
  • Patent number: 11027405
    Abstract: An oscillating power tool, including: a housing; an output shaft for installing a working head, the output shaft being installed in the housing and extending out of the housing; a transmission mechanism, installed in the housing, and the transmission mechanism being connected to the output shaft; and a motor, installed in the housing, the motor being connected to the transmission mechanism and driving the transmission mechanism to drive the output shaft to move, where an outer diameter of the motor is in a range of 40 mm to 50 mm.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: June 8, 2021
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventors: Shisong Zhang, Xiaoli Pang, Hongfeng Zhong, Yu Wu, Weifeng Li, Xiao Zhao, Zhongya Zhou, Hongbing Wu, Haiquan Wu, Yinhang Bian, Hui Lu, Hui Li, Wei Zhang
  • Publication number: 20210146494
    Abstract: Disclosed is a grinding disk kit for finishing rolling surfaces of bearing rollers, including a pair of coaxial first and second grinding disks; a front face of the first grinding disk includes a group of radially distributed linear grooves and transition faces for connecting the adjacent linear grooves; a front face of the second grinding disk includes one or more helical grooves and transition faces for connecting adjacent helical grooves; one bearing roller to be machined is distributed in each linear groove corresponding to each intersection of the helical grooves and the linear grooves during grinding machining; the rolling surfaces of the bearing rollers to be machined are respectively in contact with working faces of the linear grooves and the helical grooves corresponding to each intersection; and the bearing rollers to be machined translate along the linear grooves while rotating about the own axes under the friction.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Inventors: Chengzu REN, Weifeng LIU, Jing ZHANG, Kun GENG, Yang CHEN, Guang CHEN, Ying YANG, Yunhui ZHANG, Qingshun HE, Xiaofan DENG, Xin LI, Chuanbin YAN, Xiang GE, Xinmin JIN
  • Patent number: 10988818
    Abstract: An efficient long-service-life blowing method include the steps of introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor; obtaining first-purity CO2—N2 mixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO2—N2 mixed gas through the decarburization converter flue gas; obtaining O2—CO2—N2 mixed gas through the decarburization converter flue gas; obtaining first-purity CO2 gas through the second-purity CO2—N2 mixed gas; and using the first-purity CO2—N2 mixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO2—N2 mixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O2—CO2—N2 mixed gas and the first-purity CO2 gas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: April 27, 2021
    Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
    Inventors: Rong Zhu, Shaoyan Hu, Kai Dong, Guangsheng Wei, Haoran Ma, Weifeng Li, Yun Zhou, Zhihui Li, Wenhe Wu, Baochen Han, Chao Feng, Rongfang Su
  • Patent number: 10982242
    Abstract: The present invention relates to an optimized fermentation process of coenzyme Q10, particularly to a fermentation process of coenzyme Q10 via flow feeding based on cooperative control of changes of online oxygen consumption rate and conductivity. During the fermentation process of coenzyme Q10 production strains, the oxygen consumption rate is controlled between 30-150 mmol/L·h and the conductivity is maintained between 3.0-30.0 ms/cm via flow feeding, so as to facilitate strain growth and the start of coenzyme Q10 synthesis and accumulation. The present invention can substantially increase output of coenzyme Q10 and greatly reduce the production cost with simple process control and strong operability, thus being applicable to large-scale industrial production.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: April 20, 2021
    Assignees: SHANGYU NHU BIOLOGICAL CHEMICAL CO., LTD., ZHEJIANG UNIVERSITY, ZHEJIANG NHU COMPANY LTD.
    Inventors: Hongwei Yu, Yong Lv, Yong Li, Jianbo Chen, Shaofeng Chen, Weifeng Li, Hongmei Zhang, Yongqiang Zhu
  • Publication number: 20200340070
    Abstract: An efficient long-service-life blowing method include the steps of introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor; obtaining first-purity CO2—N2 mixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO2—N2 mixed gas through the decarburization converter flue gas; obtaining O2—CO2—N2 mixed gas through the decarburization converter flue gas; obtaining first-purity CO2 gas through the second-purity CO2—N2 mixed gas; and using the first-purity CO2—N2 mixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO2—N2 mixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O2—CO2—N2 mixed gas and the first-purity CO2 gas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter.
    Type: Application
    Filed: July 10, 2020
    Publication date: October 29, 2020
    Inventors: Rong ZHU, Shaoyan HU, Kai DONG, Guangsheng WEI, Haoran MA, Weifeng LI, Yun ZHOU, Zhihui LI, Wenhe WU, Baochen HAN, Chao FENG, Rongfang SU
  • Publication number: 20190099873
    Abstract: An oscillating power tool, including: a housing; an output shaft for installing a working head, the output shaft being installed in the housing and extending out of the housing; a transmission mechanism, installed in the housing, and the transmission mechanism being connected to the output shaft; and a motor, installed in the housing, the motor being connected to the transmission mechanism and driving the transmission mechanism to drive the output shaft to move, where an outer diameter of the motor is in a range of 40 mm to 50 mm.
    Type: Application
    Filed: November 30, 2018
    Publication date: April 4, 2019
    Inventors: Shisong Zhang, Xiaoli Pang, Hongfeng Zhong, Yu Wu, Weifeng Li, Xiao Zhao, Zhongya Zhou, Hongbing Wu, Haiquan Wu, Yinhang Bian, Hui Lu, Hui Li, Wei Zhang
  • Patent number: 10077211
    Abstract: It discloses cement grinding aids prepared with waste antifreeze which comprises the following components in parts by weight: 20-75 parts of pretreated waste antifreeze, 5-40 parts of alkanolamine, 1-5 parts of acid solution, 3-12 parts of saccharide and 15-50 parts of water. The pretreated waste antifreeze is prepared by adding an alkaline solution into waste antifreeze to regulate the pH value, adding a flocculant, and stirring and standing; separating upper-layer oil, and then filtering to remove flocculent precipitates, thus obtaining a clear mixed solution.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 18, 2018
    Assignee: NANJING TECH UNIVERSITY
    Inventors: Weifeng Li, Suhua Ma, Xiaodong Shen
  • Publication number: 20180245113
    Abstract: The present invention relates to an optimized fermentation process of coenzyme Q10, particularly to a fermentation process of coenzyme Q10 via flow feeding based on cooperative control of changes of online oxygen consumption rate and conductivity. During the fermentation process of coenzyme Q10 production strains, the oxygen consumption rate is controlled between 30-150 mmol/L·h and the conductivity is maintained between 3.0-30.0 ms/cm via flow feeding, so as to facilitate strain growth and the start of coenzyme Q10 synthesis and accumulation. The present invention can substantially increase output of coenzyme Q10 and greatly reduce the production cost with simple process control and strong operability, thus being applicable to large-scale industrial production.
    Type: Application
    Filed: October 21, 2016
    Publication date: August 30, 2018
    Inventors: HONGWEI YU, YONG LV, YONG LI, JIANBO CHEN, ZHAOFENG CHEN, WEIFENG LI, HONGMEI ZHANG, YONGQIANG ZHU
  • Publication number: 20180141863
    Abstract: It discloses cement grinding aids prepared with waste antifreeze which comprises the following components in parts by weight: 20-75 parts of pretreated waste antifreeze, 5-40 parts of alkanolamine, 1-5 parts of acid solution, 3-12 parts of saccharide and 15-50 parts of water. The pretreated waste antifreeze is prepared by adding an alkaline solution into waste antifreeze to regulate the pH value, adding a flocculant, and stirring and standing; separating upper-layer oil, and then filtering to remove flocculent precipitates, thus obtaining a clear mixed solution.
    Type: Application
    Filed: September 29, 2015
    Publication date: May 24, 2018
    Applicant: NANJING TECH UNIVERSITY
    Inventors: Weifeng LI, Suhua MA, Xiaodong SHEN
  • Patent number: 9868674
    Abstract: A chemical additive for calcium sulphoaluminate-modified Portland cement comprises the following substances: (a) at least one alkanolamine borate; (b) at least one organic alcohol; and (c) at least one saccharide or a derivative thereof; and the substances and water are sequentially mixed and stirred to obtain the chemical additive for calcium sulphoaluminate-modified Portland cement. The chemical additive for calcium sulphoaluminate-modified Portland cement provided by the invention has better effects of regulating the setting time of the calcium sulphoaluminate-modified Portland cement and improving the 3d/28d strength increase rate, and also has a grinding aid effect when being added during grinding.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 16, 2018
    Assignee: NANJING TECH UNIVERSITY
    Inventors: Weifeng Li, Suhua Ma, Jin Yu, Yueyang Hu, Xiaodong Shen
  • Publication number: 20170267593
    Abstract: A chemical additive for calcium sulphoaluminate-modified Portland cement comprises the following substances: (a) at least one alkanolamine borate; (b) at least one organic alcohol; and (c) at least one saccharide or a derivative thereof; and the substances and water are sequentially mixed and stirred to obtain the chemical additive for calcium sulphoaluminate-modified Portland cement. The chemical additive for calcium sulphoaluminate-modified Portland cement provided by the invention has better effects of regulating the setting time of the calcium sulphoaluminate-modified Portland cement and improving the 3d/28d strength increase rate, and also has a grinding aid effect when being added during grinding.
    Type: Application
    Filed: September 29, 2015
    Publication date: September 21, 2017
    Applicant: NANJING TECH UNIVERSITY
    Inventors: Weifeng LI, Suhua MA, Jin YU, Yueyang HU, Xiaodong SHEN
  • Patent number: 9615993
    Abstract: The present invention is a massage chair, having a main frame with specific curve, a chair back located by a chair seat with a rotation angle; wherein the main frame including back section, buttock section and leg section, the buttock section has an upward curve and the leg section has a downward curve, thus, massage provider can provide massage service to human thigh when the rotation angle is more than 110 degree; a seat supporter is restricted by a restriction supporter, then the rotation angle is smaller as a first rotation supporter rotates counter-clockwise and the main frame rotates clockwise, wherein the seat supporter is disposed within the chair seat, and the first rotation terminal is disposed under the main frame.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: April 11, 2017
    Assignee: NINGBO COMFORT HEALTH EQUIPMENT CO., LTD.
    Inventors: Haiming Wang, Qiankun Gu, Weifeng Li
  • Patent number: 9532921
    Abstract: The present invention is a massage chair, having frame body with specific curve, a chair back located by the chair seat, wherein the chair back is adjusted properly by the chair seat for rotating and having a rotation angle; wherein the frame body including back section, buttock section and leg section, the buttock section has a downward curve and the leg section has an upward curve, thus, massage module can provide massage service to human thigh when the rotation angle is more than 110 degrees.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 3, 2017
    Assignee: NINGBO COMFORT HEALTH EQUIPMENT CO., LTD.
    Inventors: Haiming Wang, Qiankun Gu, Weifeng Li
  • Patent number: 9532920
    Abstract: The present invention is a massage chair, having main frame with specific curve, a chair back located by the chair seat, wherein the chair back is adjusted properly by the chair seat for rotating and having a rotation angle; wherein the main frame including back section, buttock section and leg section, the buttock section has an upward curve and the leg section has a downward curve, thus, massage provider can provide massage service to human thigh when the rotation angle is more than 110 degrees.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 3, 2017
    Assignee: NINGBO COMFORT HEALTH EQUIPMENT CO., LTD.
    Inventors: Haiming Wang, Qiankun Gu, Weifeng Li
  • Patent number: 9503364
    Abstract: Embodiments of the present application provide a label switching path calculation method and a label switching path calculation device. In the method, by performing hierarchical level and domain value planning on a node in a network in advance, when an LSP is calculated, hierarchical domain information about each node is acquired, and the LSP is calculated using the acquired hierarchical domain information about each node. Since the hierarchical domain information about each node designates a network position where the node is located, it can be avoided that an LSP obtained by calculation reroutes an access layer according to the hierarchical domain information about each node and a satisfaction criterion for the LSP during the LSP calculation process. In addition, the technical solution provided in the embodiments of the present application needs no manual intervention in the whole LSP calculation process, realizing the automatic calculation of an LSP.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: November 22, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Li Zhang, Weifeng Li, Ruichuan You
  • Patent number: 9178811
    Abstract: Embodiments of the present invention provide a method for generating a label forwarding table for a non-destination router on a ring topology. Embodiments of the present invention further provide an apparatus for generating a label forwarding table for a non-destination router on a ring topology and a method and system for generating two label switching paths LSPs of different ring directions on a ring topology. Technical solutions provided by the embodiments of the present invention are based on a clockwise label forwarding table and a counterclockwise label forwarding table that are generated for each non-destination router on the ring topology. When it is found that traffic cannot be forwarded to a destination router by using one of the two label forwarding tables, the non-destination router performs traffic switching and uses the other label forwarding table to forward the traffic.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 3, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Weifeng Li
  • Publication number: 20150297441
    Abstract: The present invention is a massage chair, having a main frame with specific curve, a chair back located by a chair seat with a rotation angle; wherein the main frame including back section, buttock section and leg section, the buttock section has an upward curve and the leg section has a downward curve, thus, massage provider can provide massage service to human thigh when the rotation angle is more than 110 degree; a seat supporter is restricted by a restriction supporter, then the rotation angle is smaller as a first rotation supporter rotates counter-clockwise and the main frame rotates clockwise, wherein the seat supporter is disposed within the chair seat, and the first rotation terminal is disposed under the main frame.
    Type: Application
    Filed: June 27, 2014
    Publication date: October 22, 2015
    Inventors: Haiming Wang, Qiankun Gu, Weifeng Li
  • Patent number: D907386
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: January 12, 2021
    Assignee: XIAMEN ANNMACARE SCIENCE & TECHNOLOGY CO., LTD.
    Inventors: Zhibin Zheng, Weifeng Li, Qiankun Gu