Patents by Inventor Weng-Shih Cang

Weng-Shih Cang 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).

  • Dry vacuum pump
    Patent number: 6638040
    Abstract: A dry vacuum pump comprises a scroll-type vacuum pump and a rotary-vane vacuum pump, wherein the rotary-vane vacuum pump is mounted on the side of an inlet, whereas the scroll-type vacuum pump is mounted on the side of an outlet, and then a compound-type dry vacuum pump is formed by connecting and integrating the rotary-vane vacuum pump and the scroll-type vacuum pump, having the advantages of high compression ratio, high vacuuming speed, low production cost and simplified structure, thus improving the working effectiveness and quality of pumps accordingly.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: October 28, 2003
    Assignee: Industrial Technology Research Institute
    Inventors: Chih-Cheng Wang, Jenn Chen Tang, Cheng Chou Shieh, Weng-Shih Cang
  • Dry vacuum pump
    Publication number: 20030124011
    Abstract: A dry vacuum pump comprises a scroll-type vacuum pump and a rotary-vane vacuum pump, wherein the rotary-vane vacuum pump is mounted on the side of an inlet, whereas the scroll-type vacuum pump is mounted on the side of an outlet, and then a compound-type dry vacuum pump is formed by connecting and integrating the rotary-vane vacuum pump and the scroll-type vacuum pump, having the advantages of high compression ratio, high vacuuming speed, low production cost and simplified structure, thus improving the working effectiveness and quality of pumps accordingly.
    Type: Application
    Filed: December 31, 2001
    Publication date: July 3, 2003
    Applicant: Industrial Technology Research Institute
    Inventors: Chih-Cheng Wang, Jenn Chen Tang, Cheng Chou Shieh, Weng-Shih Cang