Patents by Inventor Kefeng Zeng

Kefeng Zeng 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: 20240085767
    Abstract: A vehicle-mounted rocker arm without counterweight, includes a heading shaft, a pitching shaft part, an arm body, a damping arm, and a housing. The pitching shaft part includes a main structure frame, a rocker arm, a servo electric cylinder, and a gas spring. The gas spring can balance the weight loaded by the arm body so that the force exerted by the servo electric cylinder during stretching and contracting is balanced, so as to achieve the effect of balancing the longitudinal center of gravity of the arm body without using a counterweight. The vehicle-mounted rocker arm without counterweight is further characterized in that pitching shaft part and the rotating shaft are independent modules, and can be dismounted and installed separately. The vehicle-mounted rocker arm without counterweight is further characterized in that the arm body part has a truss type quick butting structure.
    Type: Application
    Filed: September 12, 2022
    Publication date: March 14, 2024
    Inventors: Wenping Zeng, Kefeng Zhou
  • Publication number: 20220262220
    Abstract: An advertising display unit based on an anti-theft antenna includes an antenna body and an antenna panel installed on the antenna body. The antenna panel includes a front side and a reverse side. The antenna panel includes a display screen on one of the front side or reverse side. The display screen may be an LED screen or LCD screen. The display screen may be opaque or transparent.
    Type: Application
    Filed: July 21, 2020
    Publication date: August 18, 2022
    Inventors: Nimesh SHAH, Christophe Jean Dominique CASTAGNE, Zhihao YANG, Benjamin RUBINSTEIN, Kefeng ZENG
  • Patent number: 9870686
    Abstract: A system, method, and device for improving the functioning of security tags for use with merchandise are provided. A security tag device, to be used in conjunction with a tag monitoring device, may be provided with a product. The product may be conductive or may have metallic packaging. The security tag may include a planar dielectric substrate having a first side and an opposing side. An electronic article surveillance (EAS) circuit may be placed on the first side of the planar dielectric substrate. A ferrite sheet having a first side and an opposing side may be coupled to the opposing side of the planar dielectric substrate. A metal backing sheet may be coupled to the opposing side of the ferrite sheet. The planar dielectric substrate may be centered or offset on the ferrite sheet and the ferrite sheet may be centered or offset on the metal backing sheet.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: January 16, 2018
    Assignee: Checkpoint Systems, Inc.
    Inventors: Kefeng Zeng, John B. Mingle, George West, Trang Nguyen
  • Publication number: 20170186296
    Abstract: A system, method, and device for improving the functioning of security tags for use with merchandise are provided. A security tag device, to be used in conjunction with a tag monitoring device, may be provided with a product. The product may be conductive or may have metallic packaging. The security tag may include a planar dielectric substrate having a first side and an opposing side. An electronic article surveillance (EAS) circuit may be placed on the first side of the planar dielectric substrate. A ferrite sheet having a first side and an opposing side may be coupled to the opposing side of the planar dielectric substrate. A metal backing sheet may be coupled to the opposing side of the ferrite sheet. The planar dielectric substrate may be centered or offset on the ferrite sheet and the ferrite sheet may be centered or offset on the metal backing sheet.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 29, 2017
    Inventors: Kefeng Zeng, John B. Mingle, George West, Trang Nguyen
  • Publication number: 20170162952
    Abstract: In one embodiment, the invention can be a radio frequency identification (RFID) tag including a substrate; a dipole antenna on the substrate; a first loop antenna on the substrate; a first integrated circuit operably coupled to the first loop antenna; a second loop antenna on the substrate; and a second integrated circuit operably coupled to the second loop antenna; wherein the first loop antenna is operatively coupled to the dipole antenna and the first integrated circuit to operate at a first resonant frequency, and the second loop antenna is operatively coupled to the dipole antenna and the second integrated circuit to operate at a second resonant frequency, the first resonant frequency being different from the second resonant frequency.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 8, 2017
    Inventor: Kefeng Zeng
  • Patent number: 9508238
    Abstract: A system and device for detecting and/or deactivating a security tag when passing through an electronic article surveillance (EAS) portal. The portal may be oriented by the arrangement of one or more antennas to generate an electromagnetic field at or within the portal to detect and/or deactivate the security tag. The electromagnetic field may detect and/or deactivate a security tag located at any orientation on merchandise as the security tag passes through the portal. The portal may be mounted on a counter at a point-of-sale station in which merchandise having security tags attached thereto are passed through the portal. The portal may also be mounted to a floor in which a shopping cart having merchandise is passed through the portal so that security tags attached to the merchandise in the cart are detected and/or deactivated.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: November 29, 2016
    Assignee: CHECKPOINT SYSTEMS, INC.
    Inventors: Kefeng Zeng, Ronald Decker, Nimesh Shah, Brennan Bradley
  • Publication number: 20160162775
    Abstract: A device and system utilizing the ground plane of a printed circuit board (PCB) for an antenna. In one embodiment, the device can be a tag comprising a housing forming a housing cavity; a PCB positioned in the housing cavity, wherein the PCB comprises a ground plane forming an antenna; and a first circuit operably coupled to the antenna.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 9, 2016
    Inventor: Kefeng Zeng
  • Patent number: 9224021
    Abstract: A system and method for automatically deactivating a security tag upon entry into business establishment to prevent tag pollution. The system and method involve positioning a security tag deactivator at an entrance of a business establishment and emitting an EM field sufficient to deactivate any security tag that enters into the business establishment.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: December 29, 2015
    Assignee: CHECKPOINT SYSTEMS, INC.
    Inventors: Lothar Grunenberg, Nimesh Shah, Kefeng Zeng
  • Patent number: 8933790
    Abstract: This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. The invention achieves the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation while using single transmission drivers to drive entire antenna structures, whether loop antenna or ferrite core antenna, using a phase coupler, thereby allowing more efficient system operation or additional features such as deactivator antenna operation.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: January 13, 2015
    Assignee: Checkpoint Systems, Inc.
    Inventors: Harry Oung, Kefeng Zeng
  • Publication number: 20140266728
    Abstract: A system and device for detecting and/or deactivating a security tag when passing through an electronic article surveillance (EAS) portal. The portal may be oriented by the arrangement of one or more antennas to generate an electromagnetic field at or within the portal to detect and/or deactivate the security tag. The electromagnetic field may detect and/or deactivate a security tag located at any orientation on merchandise as the security tag passes through the portal. The portal may be mounted on a counter at a point-of-sale station in which merchandise having security tags attached thereto are passed through the portal. The portal may also be mounted to a floor in which a shopping cart having merchandise is passed through the portal so that security tags attached to the merchandise in the cart are detected and/or deactivated.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: Kefeng Zeng, Ronald Decker, Nimesh Shah, Brennan Bradley
  • Patent number: 8587489
    Abstract: This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve security tag detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. It is the object of this invention to achieve the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: November 19, 2013
    Assignee: Checkpoint Systems, Inc.
    Inventors: Harry Oung, Kefeng Zeng
  • Publication number: 20120212343
    Abstract: A system and method for automatically deactivating a security tag upon entry into business establishment to prevent tag pollution. The system and method involve positioning a security tag deactivator at an entrance of a business establishment and emitting an EM field sufficient to deactivate any security tag that enters into the business establishment.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 23, 2012
    Applicant: CHECKPOINT SYSTEMS, INC.
    Inventors: Lothar Grunenberg, Nimesh Shah, Kefeng Zeng
  • Patent number: 7912661
    Abstract: Circuitry and program code adapted for carrying out an associated technique for characterizing the response of one or more magnetoelastic sensor elements during exposure to an excitation field generated by an interrogation coil: including: (a) measuring a total sensor signal from the coil with the sensor element positioned within the excitation field within a spacing created by a winding of the coil; and (b) automatically determining: (i) a total measured impedance spectrum from said total sensor signal so measured, and (ii) a plurality of magnitude values representing the real part of a reconstructed impedance spectrum for the sensor element. The reconstructed impedance spectrum for the sensor element, having been calculated by subtracting an impedance generally attributable to the coil during the time an AC excitation signal is provided, from the total measured impedance.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: March 22, 2011
    Assignee: KMG2 Sensors Corporation
    Inventors: Kefeng Zeng, Keat Ghee Ong, Xiping Yang, Craig A. Grimes
  • Publication number: 20090261976
    Abstract: This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. The invention achieves the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation while using single transmission drivers to drive entire antenna structures, whether loop antenna or ferrite core antenna, using a phase coupler, thereby allowing more efficient system operation or additional features such as deactivator antenna operation.
    Type: Application
    Filed: April 30, 2009
    Publication date: October 22, 2009
    Applicant: Checkpoint Systems, Inc.
    Inventors: Harry Oung, Kefeng Zeng
  • Publication number: 20080303673
    Abstract: This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve security tag detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. It is the object of this invention to achieve the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 11, 2008
    Applicant: CHECKPOINT SYSTEMS, INC.
    Inventors: Harry Oung, Kefeng Zeng
  • Publication number: 20080261261
    Abstract: A system/analyzer-unit and method/platform—using information obtained from at least one, adapted for a plurality of, magnetoelastic sensor elements in contact with one or more samples comprising blood from a patient—for automatically quantifying one or more parameters of the patient's blood. Information obtained from emissions measured from each of the sensor elements is uniquely processed to determine a quantification about the patient's blood, such as, quantifying platelet aggregation to determine platelet contribution toward clot formation; quantifying fibrin network contribution toward clot formation; quantifying platelet-fibrin clot interactions; quantifying kinetics of thrombin clot generation; quantifying platelet-fibrin clot strength; and so on.
    Type: Application
    Filed: April 2, 2008
    Publication date: October 23, 2008
    Inventors: Craig A. Grimes, Kefeng Zeng, Keat Ghee Ong, Xiping Yang
  • Publication number: 20080071487
    Abstract: Circuitry and program code adapted for carrying out an associated technique for characterizing the response of one or more magnetoelastic sensor elements during exposure to an excitation field generated by an interrogation coil: including: (a) measuring a total sensor signal from the coil with the sensor element positioned within the excitation field within a spacing created by a winding of the coil; and (b) automatically determining: (i) a total measured impedance spectrum from said total sensor signal so measured, and (ii) a plurality of magnitude values representing the real part of a reconstructed impedance spectrum for the sensor element. The reconstructed impedance spectrum for the sensor element, having been calculated by subtracting an impedance generally attributable to the coil during the time an AC excitation signal is provided, from the total measured impedance.
    Type: Application
    Filed: February 23, 2007
    Publication date: March 20, 2008
    Inventors: Kefeng Zeng, Keat Ong, Xiping Yang, Craig Grimes
  • Patent number: 7113876
    Abstract: Circuitry adapted for carrying out associated techniques for: (a) calculating a damping factor, e.g., a damping ratio represented by ?, or a quality factor Q, where ??1/2Q, for a transient signal received, having been emitted from a resonator-type sensor element; (b) determining amplitude, A, of the transient signal; or (c) generating a frequency response dataset of interrelated points for the transient signal. A threshold comparison circuit is included for converting the transient signal received into a first and second digital waveform; the first digital waveform represents cycle crossings of the transient signal associated with a first threshold value, and the second digital waveform represents cycle crossings of the transient signal associated with a second threshold value. The transient signal may be converted, likewise, into third, and so on, digital waveforms, whereby the third digital waveform represents cycle crossings of the transient signal associated with a third threshold value.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: September 26, 2006
    Assignee: SenTech Biomed Corporation
    Inventors: Kefeng Zeng, Keat G. Ong, Craig A. Grimes
  • Publication number: 20060064259
    Abstract: Circuitry adapted for carrying out associated techniques for: (a) calculating a damping factor, e.g., a damping ratio represented by ?, or a quality factor Q, where ??1/2Q, for a transient signal received, having been emitted from a resonator-type sensor element; (b) determining amplitude, A, of the transient signal; or (c) generating a frequency response dataset of interrelated points for the transient signal. A threshold comparison circuit is included for converting the transient signal received into a first and second digital waveform; the first digital waveform represents cycle crossings of the transient signal associated with a first threshold value, and the second digital waveform represents cycle crossings of the transient signal associated with a second threshold value. The transient signal may be converted, likewise, into third, and so on, digital waveforms, whereby the third digital waveform represents cycle crossings of the transient signal associated with a third threshold value.
    Type: Application
    Filed: September 8, 2004
    Publication date: March 23, 2006
    Inventors: Kefeng Zeng, Keat Ong, Craig Grimes