Patents by Inventor Samuel Leung

Samuel Leung 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).

  • Patent number: 11967790
    Abstract: A power transfer system to facilitate the transfer of electrical power between tree trunk sections of an artificial tree is disclosed. The power transfer system can advantageously enable neighboring tree trunk sections to be electrically connected without the need to rotationally align the tree trunk sections. Power distribution subsystems can be disposed within the trunk sections. The power distribution subsystems can comprise a male end, a female end, or both. The male ends can have prongs and the female ends can have voids. The prongs can be inserted into the voids to electrically connect the power distribution subsystems of neighboring tree trunk sections. In some embodiments, the prongs and voids are designed so that the prongs of one power distribution subsystem can engage the voids of another power distribution subsystem without the need to rotationally align the tree trunk sections.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: April 23, 2024
    Assignee: Polygroup Macau Limited (BVI)
    Inventors: Chi Yin Alan Leung, Ricky Tong, Chi Kin Samuel Kwok, Chang-Jun He
  • Patent number: 11476703
    Abstract: There is described an emergency lighting system for minimizing power leakage to assure proper operation of an emergency mode. The system comprises a digital addressable lighting bus having digital control lines, a driver, and a lighting control. The driver receives emergency power and provides the emergency power to a light emitter in response to detecting that the digital control lines are shorted. The lighting control receives normal power and includes a relay contact that shorts the digital control lines in response to detecting lack of the normal power. For another aspect, the driver and the lighting control are coupled to lighting control lines, which are either digital or analog control lines. For yet another aspect, a control bypass comprises a power unit, a relay coil, and a relay contact. The relay contact manages outputs of the power unit in response to activation and de-activation by the relay coil.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: October 18, 2022
    Assignee: Building Robotics, Inc.
    Inventors: Michael N. Gershowitz, Samuel Leung
  • Publication number: 20220278549
    Abstract: There is described an emergency lighting system for minimizing power leakage to assure proper operation of an emergency mode. The system comprises a digital addressable lighting bus having digital control lines, a driver, and a lighting control. The driver receives emergency power and provides the emergency power to a light emitter in response to detecting that the digital control lines are shorted. The lighting control receives normal power and includes a relay contact that shorts the digital control lines in response to detecting lack of the normal power. For another aspect, the driver and the lighting control are coupled to lighting control lines, which are either digital or analog control lines. For yet another aspect, a control bypass comprises a power unit, a relay coil, and a relay contact. The relay contact manages outputs of the power unit in response to activation and de-activation by the relay coil.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 1, 2022
    Inventors: Michael N. Gershowitz, Samuel Leung
  • Patent number: 8709162
    Abstract: A substrate support assembly and method for controlling the temperature of a substrate within a process chamber with a temperature uniformity of +/?5° C. are provided. A substrate support assembly includes a thermally conductive body comprising an aluminum material, a substrate support surface on the surface of the thermally conductive body and adapted to support the large area glass substrate thereon, one or more heating elements embedded within the thermally conductive body, and one or more cooling channels embedded within the thermally conductive body and positioned around the one or more heating elements. A process chamber comprising the substrate support assembly of the invention is also provided.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: April 29, 2014
    Assignee: Applied Materials, Inc.
    Inventors: Samuel Leung, Su Ho Cho, William Allan Bagley
  • Publication number: 20080127887
    Abstract: The present invention generally comprises a physical vapor deposition (PVD) system having separate susceptor, cathode, and lid sections in which each section is on a rail that elevates the sections off the ground. The cathode section may comprise a plurality of rotatable cathodes that lie in a plane such that the axis of rotation for the rotary cathodes is perpendicular to the ground. The lid section and the cathode section may be moved on the rails to open the cathode section for servicing. Of the plurality of rotatable cathodes, the cathodes corresponding to the center of the substrate upon which material will be deposited are spaced a greater distance from the substrate than rotatable cathodes corresponding to the edge of the substrate.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 5, 2008
    Inventors: Samuel Leung, Andreas Geiss, Toshio Kiyotake, Erkan Koparal, Jose Albor, William Allan Bagley
  • Publication number: 20070039942
    Abstract: A substrate support assembly and method for controlling the temperature of a substrate within a process chamber with a temperature uniformity of +/?5° C. are provided. A substrate support assembly includes a thermally conductive body comprising an aluminum material, a substrate support surface on the surface of the thermally conductive body and adapted to support the large area glass substrate thereon, one or more heating elements embedded within the thermally conductive body, and one or more cooling channels embedded within the thermally conductive body and positioned around the one or more heating elements. A process chamber comprising the substrate support assembly of the invention is also provided.
    Type: Application
    Filed: August 16, 2005
    Publication date: February 22, 2007
    Inventors: Samuel Leung, Su Ho Cho, William Bagley
  • Publication number: 20060207508
    Abstract: The present invention relates generally to a clamping and alignment assembly for a substrate processing system. The clamping and aligning assembly generally includes a shadow frame, a floating shadow frame and a plurality of insulating alignment pins. The shadow frame comprises a plurality of fingers extending inwardly therefrom and is shaped to accommodate a substrate. The fingers comprise a spring loaded assembly for aligning and stabilizing a substrate on a support member during processing. The insulating alignment pins are disposed at a perimeter of a movable support member and cooperate with an alignment recess formed in the shadow frame to urge the shadow frame into a desired position. Preferably, the floating shadow frame is disposed on the insulating alignment pins in spaced relationship between the support member and the shadow frame to shield the perimeter of the support member during processing.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 21, 2006
    Inventor: Samuel Leung
  • Publication number: 20060107973
    Abstract: A substrate processing system, which includes a vacuum deposition process chamber having an exhaust outlet configured to discharge one or more particles during a deposition cycle and cleaning gas reactants during a cleaning cycle and an in-situ particle monitor coupled to the exhaust outlet. The in-situ particle monitor is configured to determine a starting point of the cleaning cycle. The plasma enhanced chemical vapor deposition system further includes an infrared endpoint detector assembly coupled to the exhaust outlet. The infrared endpoint detector assembly is configured to determine an endpoint of the cleaning cycle.
    Type: Application
    Filed: October 11, 2005
    Publication date: May 25, 2006
    Inventor: Samuel Leung
  • Publication number: 20060075968
    Abstract: A method and apparatus for a plasma enhanced chemical vapor deposition system for processing one or more flat panel display substrates comprising a vacuum deposition process chamber configured to contain gas, a residual gas analyzer configured to analyze the gas within the process chamber and to provide feedback, and a controller to monitor feedback from the gas analyzer. Also, a method for identifying a process upset within a plasma enhanced chemical vapor deposition system configured to process flat panel display substrates comprising determining a historical slope of a line for partial pressure as a function of time, calculating a new slope of a line based on partial pressure measurements by a residual gas analyzer, comparing the historical and new slopes, and sending a signal to an operator.
    Type: Application
    Filed: March 23, 2005
    Publication date: April 13, 2006
    Inventors: Samuel Leung, Ulrich Bonne
  • Patent number: 6198727
    Abstract: A link device establishes links automatically to all 10Base-T and 100Base-TX partners regardless of their capability thereby assuring that the link device establishes links with all partners without the need to select a mode of operation manually. The modes of operation provided include 10Base-T half duplex, 100Base-TX half duplex, and 100Base-TX full duplex. The technique includes an algorithm that assures linkability between 10Base-T and 100Base-TX devices that are not 100% compliant with IEEE 802.3u, Clause 28. Using this algorithm, a link device links with 10Base-T and 100Base-TX half duplex legacy partners. Such devices also link with compliant 10Base-T and 100Base-TX auto-negotiating partners at 100Base-TX full duplex, and with non-compliant 10Base-T and 100Base-TX auto-negotiating devices at 100Base-TX half duplex.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: March 6, 2001
    Assignee: Hewlett-Packard Company
    Inventors: Timothy Wakeley, Samuel Leung, Shuosen Robert Liu, Keung Tang