Patents by Inventor Hsien-Liang Cheng

Hsien-Liang Cheng 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).

  • Diaphragm pump and valve plate thereof
    Patent number: 11193478
    Abstract: A diaphragm pump includes a valve seat, a head cover covered on the valve seat, and a pair of valve plates. A surface of the valves seat is formed concavely with a first receiving trough with a first flow passage, and a second receiving trough with a second flow passage. One of the valve plates is disposed in the first receiving trough, and the other one is disposed in the second receiving trough. The first and second receiving troughs respectively have a geometric shape corresponding with that of the valve plate. The valve plate has a sealing part, and at least one extending arm extended outwardly from the sealing part. The sealing part has a geometric shape being bilaterally symmetrical. The extending arm has an arced end. A gap is existed between an edge of the valves plate and the first receiving trough or the second receiving trough.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: December 7, 2021
    Assignee: KOGE MICRO TECH CO., LTD.
    Inventors: Po-Han Chang, Shu-Hong Lin, Hsien-Liang Cheng, Kang-Hung Yeh
  • DIAPHRAGM PUMP AND VALVE PLATE THEREOF
    Publication number: 20190376503
    Abstract: A diaphragm pump includes a valve seat, a head cover covered on the valve seat, and a pair of valve plates. A surface of the valves seat is formed concavely with a first receiving trough with a first flow passage, and a second receiving trough with a second flow passage. One of the valve plates is disposed in the first receiving trough, and the other one is disposed in the second receiving trough. The first and second receiving troughs respectively have a geometric shape corresponding with that of the valve plate. The valve plate has a sealing part, and at least one extending arm extended outwardly from the sealing part. The sealing part has a geometric shape being bilaterally symmetrical. The extending arm has an arced end. A gap is existed between an edge of the valves plate and the first receiving trough or the second receiving trough.
    Type: Application
    Filed: October 3, 2018
    Publication date: December 12, 2019
    Inventors: Po-Han Chang, Shu-Hong Lin, Hsien-Liang Cheng, Kang-Hung Yeh