Patents by Inventor Alec Kam Lek QUAN

Alec Kam Lek QUAN 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).

  • Liquid-operated actuator assembly, particularly for a flush toilet, and flush toilet incorporating the assembly
    Patent number: 9228334
    Abstract: A fluid-operated actuator assembly has a valve with an inlet for connection to a pressurized fluid source, a bi-stable electromagnetic device for operating the valve, which has a first state closing the valve and a second state opening the valve, a hydraulic actuator, and an electronic control circuit. The hydraulic actuator has an actuating member in a housing, the housing having a chamber on one side of the actuating member to which an outlet of the valve is connected for receiving fluid from the fluid source when the valve is opened, the actuating member for operation of the hydraulic actuator. The control circuit momentarily energizes the bi-stable electromagnetic device to the hydraulic actuator from the second state, back to the first state, to terminate operation of the hydraulic actuator.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: January 5, 2016
    Assignee: DEFOND COMPONENTS LIMITED
    Inventors: Kwok Chiu Yu, Kai Chi Chan, Alec Kam Lek Quan
  • FLUID-OPERATED ACTUATOR ASSEMBLY
    Publication number: 20130152293
    Abstract: A fluid-operated actuator assembly has a valve with an inlet for connection to a pressurized fluid source, a bi-stable electromagnetic device for operating the valve, which has a first state closing the valve and a second state opening the valve, a hydraulic actuator, and an electronic control circuit. The hydraulic actuator has an actuating member in a housing, the housing having a chamber on one side of the actuating member to which an outlet of the valve is connected for receiving fluid from the fluid source when the valve is opened, the actuating member for operation of the hydraulic actuator. The control circuit momentarily energizes the bi-stable electromagnetic device to the hydraulic actuator from the second state, back to the first state, to terminate operation of the hydraulic actuator.
    Type: Application
    Filed: April 30, 2012
    Publication date: June 20, 2013
    Applicant: DEFOND COMPONENTS LIMITED
    Inventors: Kwok Chiu YU, Kai Chi CHAN, Alec Kam Lek QUAN