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).
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Publication number: 20240085767Abstract: 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: ApplicationFiled: September 12, 2022Publication date: March 14, 2024Inventors: Wenping Zeng, Kefeng Zhou
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Publication number: 20220262220Abstract: 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: ApplicationFiled: July 21, 2020Publication date: August 18, 2022Inventors: Nimesh SHAH, Christophe Jean Dominique CASTAGNE, Zhihao YANG, Benjamin RUBINSTEIN, Kefeng ZENG
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Patent number: 9870686Abstract: 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: GrantFiled: December 28, 2015Date of Patent: January 16, 2018Assignee: Checkpoint Systems, Inc.Inventors: Kefeng Zeng, John B. Mingle, George West, Trang Nguyen
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Publication number: 20170186296Abstract: 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: ApplicationFiled: December 28, 2015Publication date: June 29, 2017Inventors: Kefeng Zeng, John B. Mingle, George West, Trang Nguyen
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Publication number: 20170162952Abstract: 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: ApplicationFiled: December 3, 2015Publication date: June 8, 2017Inventor: Kefeng Zeng
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Patent number: 9508238Abstract: 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: GrantFiled: March 14, 2014Date of Patent: November 29, 2016Assignee: CHECKPOINT SYSTEMS, INC.Inventors: Kefeng Zeng, Ronald Decker, Nimesh Shah, Brennan Bradley
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Publication number: 20160162775Abstract: 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: ApplicationFiled: December 8, 2014Publication date: June 9, 2016Inventor: Kefeng Zeng
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Patent number: 9224021Abstract: 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: GrantFiled: February 17, 2012Date of Patent: December 29, 2015Assignee: CHECKPOINT SYSTEMS, INC.Inventors: Lothar Grunenberg, Nimesh Shah, Kefeng Zeng
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Patent number: 8933790Abstract: 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: GrantFiled: April 30, 2009Date of Patent: January 13, 2015Assignee: Checkpoint Systems, Inc.Inventors: Harry Oung, Kefeng Zeng
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Publication number: 20140266728Abstract: 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: ApplicationFiled: March 14, 2014Publication date: September 18, 2014Inventors: Kefeng Zeng, Ronald Decker, Nimesh Shah, Brennan Bradley
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Patent number: 8587489Abstract: 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: GrantFiled: June 6, 2008Date of Patent: November 19, 2013Assignee: Checkpoint Systems, Inc.Inventors: Harry Oung, Kefeng Zeng
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Publication number: 20120212343Abstract: 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: ApplicationFiled: February 17, 2012Publication date: August 23, 2012Applicant: CHECKPOINT SYSTEMS, INC.Inventors: Lothar Grunenberg, Nimesh Shah, Kefeng Zeng
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Patent number: 7912661Abstract: 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: GrantFiled: February 23, 2007Date of Patent: March 22, 2011Assignee: KMG2 Sensors CorporationInventors: Kefeng Zeng, Keat Ghee Ong, Xiping Yang, Craig A. Grimes
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Publication number: 20090261976Abstract: 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: ApplicationFiled: April 30, 2009Publication date: October 22, 2009Applicant: Checkpoint Systems, Inc.Inventors: Harry Oung, Kefeng Zeng
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Publication number: 20080303673Abstract: 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: ApplicationFiled: June 6, 2008Publication date: December 11, 2008Applicant: CHECKPOINT SYSTEMS, INC.Inventors: Harry Oung, Kefeng Zeng
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Publication number: 20080261261Abstract: 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: ApplicationFiled: April 2, 2008Publication date: October 23, 2008Inventors: Craig A. Grimes, Kefeng Zeng, Keat Ghee Ong, Xiping Yang
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Publication number: 20080071487Abstract: 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: ApplicationFiled: February 23, 2007Publication date: March 20, 2008Inventors: Kefeng Zeng, Keat Ong, Xiping Yang, Craig Grimes
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Patent number: 7113876Abstract: 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: GrantFiled: September 8, 2004Date of Patent: September 26, 2006Assignee: SenTech Biomed CorporationInventors: Kefeng Zeng, Keat G. Ong, Craig A. Grimes
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Publication number: 20060064259Abstract: 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: ApplicationFiled: September 8, 2004Publication date: March 23, 2006Inventors: Kefeng Zeng, Keat Ong, Craig Grimes