Patents by Inventor Efrem Fesshaie
Efrem Fesshaie 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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Patent number: 11686596Abstract: Provided are waveguide sensors and position sensing systems. In some embodiments, a position sensing system may include a waveguide configured to receive and transmit a pulse, and a magnet moveable relative to the waveguide. The waveguide may include a first core layer and a second core layer, a magnetic layer between the first and second core layers, and a conductive winding around the first core layer, the second core layer, and the magnetic layer. The position sensing system may further include a first substrate layer above the conductive winding and a second substrate layer below the conductive winding.Type: GrantFiled: March 22, 2021Date of Patent: June 27, 2023Assignee: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius
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Patent number: 11570852Abstract: A pPTC heating device having areas with different power densities distributed over the surface of the device. The device is constructed using a base layer composed of a pPTC material having a layer of sectioned conductive plates disposed over and under the layer of pPTC such as to control the path of the current through the device, thereby controlling resistance of the device and the power density of the device.Type: GrantFiled: October 15, 2020Date of Patent: January 31, 2023Assignee: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius
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Patent number: 11498518Abstract: A radar-based occupancy detection system that includes a seatbelt buckle disposed adjacent a seat of a vehicle and a radar module disposed within the seatbelt buckle, the radar module including an antenna, a radio frequency (RF) transmitter, a RF receiver, and a processor, the antenna configured to broadcast a RF signal generated by the RF transmitter toward the seat, the processor configured to derive signal information from output received from the receiver and to characterize occupancy of the seat based on the signal information.Type: GrantFiled: November 17, 2019Date of Patent: November 15, 2022Assignee: Littelfuse, Inc.Inventors: Juergen Scheele, Efrem Fesshaie, Rimantas Misevi{hacek over (c)}ius
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Publication number: 20220299342Abstract: Provided are waveguide sensors and position sensing systems. In some embodiments, a position sensing system may include a waveguide configured to receive and transmit a pulse, and a magnet moveable relative to the waveguide. The waveguide may include a first core layer and a second core layer, a magnetic layer between the first and second core layers, and a conductive winding around the first core layer, the second core layer, and the magnetic layer. The position sensing system may further include a first substrate layer above the conductive winding and a second substrate layer below the conductive winding.Type: ApplicationFiled: March 22, 2021Publication date: September 22, 2022Applicant: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius
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Publication number: 20220124876Abstract: A pPTC heating device having areas with different power densities distributed over the surface of the device. The device is constructed using a base layer composed of a pPTC material having a layer of sectioned conductive plates disposed over and under the layer of pPTC such as to control the path of the current through the device, thereby controlling resistance of the device and the power density of the device.Type: ApplicationFiled: October 15, 2020Publication date: April 21, 2022Applicant: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius
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Publication number: 20210265085Abstract: A self-limiting heater and method for building the self-limiting heater are disclosed. The self-limiting heater consists of a resistor and a PTC resistor coupled together in series with a power supply. Both resistive devices have good thermal coupling. The resistor has a minimal resistance change over changes in temperature while the resistance of the PTC resistor increases with an increase in temperature. The ohmic resistance ratio between the resistor and the PTC may be used to adjust the heater characteristics and limit the characteristic sharpness.Type: ApplicationFiled: February 22, 2021Publication date: August 26, 2021Applicant: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius, Jianhua Chen, Rimantas Misevicius
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Patent number: 11054377Abstract: A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.Type: GrantFiled: March 26, 2019Date of Patent: July 6, 2021Assignee: Littelfuse, Inc.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius
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Patent number: 11054225Abstract: An ignitor for an electronic detonator, the ignitor including a microcontroller and a capacitor mounted on a printed circuit board (PCB) and electrically connected to one another, the microcontroller configured to discharge the capacitor in response to an actuation signal received by the microcontroller, a pair of conductive traces extending from the capacitor, a resistive element extending between the conductive traces and configured to radiate heat in response to current flowing therethrough, and a shroud disposed over the resistive element, the shroud containing a pyrotechnic composition that at least partially covers the resistive element.Type: GrantFiled: December 30, 2016Date of Patent: July 6, 2021Assignee: Hamlin Electronics (Suzhou) Ltd.Inventors: Efrem Fesshaie, Dong Liu, Paulius Kabisius
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Publication number: 20200172049Abstract: A radar-based occupancy detection system that includes a seatbelt buckle disposed adjacent a seat of a vehicle and a radar module disposed within the seatbelt buckle, the radar module including an antenna, a radio frequency (RF) transmitter, a RF receiver, and a processor, the antenna configured to broadcast a RF signal generated by the RF transmitter toward the seat, the processor configured to derive signal information from output received from the receiver and to characterize occupancy of the seat based on the signal information.Type: ApplicationFiled: November 17, 2019Publication date: June 4, 2020Applicant: LITTELFUSE, INC.Inventors: Juergen Scheele, Efrem Fesshaie, Rimantas Misevicius
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Patent number: 10488557Abstract: An integrated rain and solar radiation sensing module including at least two light emitting elements, a plurality of input lenses, wherein at least two of the plurality of input lenses are configured to receive and collimate light emitted by each of the light emitting elements, a plurality of output lenses numbering at least twice as many as the plurality of input lenses, wherein each output lens is configured to receive and focus light that is collimated by at least one of the plurality of input lenses and reflected off of a transparent substrate, and a plurality of light receiving elements, wherein each light receiving element configured to receive focused light from at least one of the output lenses and to convert the received light into an electrical output signal proportional to the received light.Type: GrantFiled: November 7, 2017Date of Patent: November 26, 2019Assignee: LITTELFUSE, INC.Inventors: Efrem Fesshaie, Paulius Kabisius, Mindaugas Ketlerius
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Patent number: 10480960Abstract: A position sensing system is disclosed. The position sensing system may include a hollow sensor body. A magnet may be disposed in the hollow sensor body. The magnet may be movable within the hollow sensor body.Type: GrantFiled: December 1, 2017Date of Patent: November 19, 2019Assignee: Littelfuse, Inc.Inventor: Efrem Fesshaie
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Publication number: 20190346243Abstract: An ignitor for an electronic detonator, the ignitor including a microcontroller and a capacitor mounted on a printed circuit board (PCB) and electrically connected to one another, the microcontroller configured to discharge the capacitor in response to an actuation signal received by the microcontroller, a pair of conductive traces extending from the capacitor, a resistive element extending between the conductive traces and configured to radiate heat in response to current flowing therethrough, and a shroud disposed over the resistive element, the shroud containing a pyrotechnic composition that at least partially covers the resistive element.Type: ApplicationFiled: December 30, 2016Publication date: November 14, 2019Applicant: HAMLIN ELECTRONICS (SUZHOU) LTD.Inventors: Efrem Fesshaie, Dong Liu, Paulius Kabisius
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Publication number: 20190219531Abstract: A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Applicant: Littelfuse, Inc.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius
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Patent number: 10254240Abstract: A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.Type: GrantFiled: June 16, 2015Date of Patent: April 9, 2019Assignee: LITTELFUSE, INC.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius
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Patent number: 10054476Abstract: A waveguide arrangement may include a tank defining a chamber for holding a liquid; and a pulsed waveguide (PWG) disposed at least partially within the chamber, the PWG comprising: an inner cylinder, the inner cylinder being grounded. The waveguide may also include an electrically conductive coil wrapped around the inner cylinder, wherein the pulsed waveguide is arranged to generate a first delay between a first initial pulse and a first reflected pulse when an upper surface of the liquid is at a first level, and to generate a second delay between a second initial pulse and a second reflected pulse when the upper surface of the liquid is a second level.Type: GrantFiled: July 7, 2015Date of Patent: August 21, 2018Assignee: LITTELFUSE, INC.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius
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Publication number: 20180156637Abstract: A position sensing system is disclosed. The position sensing system may include a hollow sensor body. A magnet may be disposed in the hollow sensor body. The magnet may be movable within the hollow sensor body.Type: ApplicationFiled: December 1, 2017Publication date: June 7, 2018Applicant: Littelfuse, Inc.Inventor: Efrem Fesshaie
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Publication number: 20180128942Abstract: An integrated rain and solar radiation sensing module including at least two light emitting elements, a plurality of input lenses, wherein at least two of the plurality of input lenses are configured to receive and collimate light emitted by each of the light emitting elements, a plurality of output lenses numbering at least twice as many as the plurality of input lenses, wherein each output lens is configured to receive and focus light that is collimated by at least one of the plurality of input lenses and reflected off of a transparent substrate, and a plurality of light receiving elements, wherein each light receiving element configured to receive focused light from at least one of the output lenses and to convert the received light into an electrical output signal proportional to the received light.Type: ApplicationFiled: November 7, 2017Publication date: May 10, 2018Applicant: Littelfuse, Inc.Inventors: Efrem Fesshaie, Paulius Kabisius, Mindaugas Ketlerius
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Patent number: 9400179Abstract: A position sensing system including a waveguide, a magnet movable relative to the waveguide, and a compensator configured to compensate for a change in propagation velocity of the waveguide in determining a position of the magnet relative to the waveguide. The compensator coupled to the waveguide and configured to receive a pulse, an end of line pulse corresponding to the pulse transmitted through the waveguide, and a reflected pulse corresponding to a reflection of the pulse at a point in the waveguide. The compensator configured to determine the point based at least in part on the pulse, the end of line pulse, and/or the reflected pulse.Type: GrantFiled: April 10, 2014Date of Patent: July 26, 2016Assignee: Littelfuse, Inc.Inventors: Efrem Fesshaie, Brian Johnson
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Publication number: 20160003664Abstract: A waveguide arrangement may include a tank defining a chamber for holding a liquid; and a pulsed waveguide (PWG) disposed at least partially within the chamber, the PWG comprising: an inner cylinder, the inner cylinder being grounded. The waveguide may also include an electrically conductive coil wrapped around the inner cylinder, wherein the pulsed waveguide is arranged to generate a first delay between a first initial pulse and a first reflected pulse when an upper surface of the liquid is at a first level, and to generate a second delay between a second initial pulse and a second reflected pulse when the upper surface of the liquid is a second level.Type: ApplicationFiled: July 7, 2015Publication date: January 7, 2016Applicant: LITTELFUSE, INC.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius
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Publication number: 20150362447Abstract: A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse.Type: ApplicationFiled: June 16, 2015Publication date: December 17, 2015Applicant: LITTELFUSE, INC.Inventors: Brian Johnson, Efrem Fesshaie, Rimantas Misevicius