Patents by Inventor Steven Chau

Steven Chau 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: 20240374120
    Abstract: A control valve assembly (1, 50) for an endoscope comprising a stem (2) having a longitudinal axis, a first opening (10) disposed transverse to the longitudinal axis, the first opening for allowing passage of air and/or fluid, a cap mountable to the top of the stem, a spring stanchion (3) comprising an opening configured to receive the stem and allow movement of the stem in an upward and downward position relative to the spring stanchion, and a spring (4) configured to contact the spring stanchion (3) and the cap and bias the stem upwardly with respect to the spring stanchion. The cap comprises first cap part (5, 51) having an opening to receive the stem and configured for coupling to the top of the stem (2) for movement with the stem, and a second cap part (6, 52) having an opening to receive the stem and configured to contact the spring and allow movement of the second cap part in an upward and downward position relative to the spring stanchion.
    Type: Application
    Filed: August 18, 2022
    Publication date: November 14, 2024
    Inventor: Steven Chau
  • Publication number: 20240324853
    Abstract: A suction valve (1) for an endoscope (2) is described. The suction valve comprises a valve housing (5) having a first lumen (8), a lower part (6) configured for mounting in a suction cylinder (4) of an endoscope (2), and an upper part (7), a suction arm (9) extending laterally of the upper part (7) of the valve housing (5) and having a second lumen (10) is fluidic communication with the first lumen (8), and an actuator comprising a valve to open and close the first lumen and an actuator button (18) operatively coupled to the valve, in which the actuator button is collapsible to actuate the valve to open the first lumen. The actuator button (18) is collapsible from an at-rest configuration in which a top surface of the actuator button comprises a first step (23) and a collapsed configuration in which the top surface of the actuator button comprises a first step (23) and a second step (24).
    Type: Application
    Filed: July 29, 2022
    Publication date: October 3, 2024
    Inventor: Steven Chau
  • Publication number: 20230381485
    Abstract: A connector (20, 60) to fluidically connect a medical instrument (1) with an air tube and (34) a water tube (35), comprises a housing (21 having a first through lumen (22) with a proximal opening (26) configured to couple with the air tube (34) and a distal opening (27) configured to couple with an air port (3) of the medical instrument, and a second through lumen (25) with a proximal opening (23) configured to couple with a water tube (35) and a distal opening (24) configured to couple with a water port (2) of the medical instrument. The connector is a two-part connector comprising a proximal part (28) comprising the proximal openings (26, 23) and a distal part (29) comprising the distal openings (24, 27), wherein the proximal part and distal part are configured for detachable engagement, and wherein the second through lumen (25) comprises a non-return valve (10) disposed in the distal part of the housing.
    Type: Application
    Filed: October 20, 2021
    Publication date: November 30, 2023
    Inventor: Steven Chau
  • Patent number: 7386774
    Abstract: A memory unit includes a memory organized into protected and non-protected areas. A controller manages access to the memory so that the protected area can be written to through a JTAG or CPU interface. Once written to, the protected area is only accessible to particular logic and cannot be over-written until the entire memory is erased. The controller is configured to allow a BCV to be stored in the memory through either the JTAG or CPU interface. The controller is also configured to allow writing to the protected area and boot configuration vector in memory before CPU boot-up by using a JTAG clock signal provided through an external pin when a system clock signal is not available. A reset circuit generates one or more initialization signals using either the BCV from memory or another BCV provided on external BCV pins, depending upon whether another external BCV pin is asserted.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: June 10, 2008
    Assignee: Integrated Device Technology, Inc.
    Inventors: Mitrajit Chatterjee, Ming Tang, Peter Z. Onufryk, Steven Chau