Patents by Inventor Changru Cai

Changru Cai 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).

  • High precision rigid gas-permeable contact lens edge curve polishing lathe
    Patent number: 9434042
    Abstract: A high precision rigid gas-permeable contact lens edge curve polishing lathe includes a base provided at the bottom of a machine body. A first crank and a second crank are respectively provided on two sides of the base. A detent mechanism is provided on both the first crank and the second crank. The detent mechanism includes an ejector pin matching the rotational direction of the first crank and the second crank and a numerical display unit revealing the position of the ejector pin. The contact position of a polishing sponge on a spindle of the polishing lathe and a lens can be precisely positioned through numerical reading, realizing quantized control of the polishing of a lens edge, and enabling improvement and modification to the design of the lens edge to become simpler.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: September 6, 2016
    Assignees: Wenzhou Medical University, Wenzhou FocuSee Vision Care Technologies Co., Ltd., Menicon Co., Ltd.
    Inventors: Hao Chen, Jun Jiang, Doke Atsuhiro, Ying Shi, Changru Cai
  • HIGH PRECISION RIGID GAS-PERMEABLE CONTACT LENS EDGE CURVE POLISHING LATHE
    Publication number: 20140120810
    Abstract: A high precision rigid gas-permeable contact lens edge curve polishing lathe includes a base provided at the bottom of a machine body. A first crank and a second crank are respectively provided on two sides of the base. A detent mechanism is provided on both the first crank and the second crank. The detent mechanism includes an ejector pin matching the rotational direction of the first crank and the second crank and a numerical display unit revealing the position of the ejector pin. The contact position of a polishing sponge on a spindle of the polishing lathe and a lens can be precisely positioned through numerical reading, realizing quantized control of the polishing of a lens edge, and enabling improvement and modification to the design of the lens edge to become simpler.
    Type: Application
    Filed: July 22, 2011
    Publication date: May 1, 2014
    Applicants: WENZHOU FOCUSEE VISION CARE TECHNOLOGIES CO., LTD., WENZHOU MEDICAL UNIVERSITY, MENICON CO., LTD.
    Inventors: Hao Chen, Jun Jiang, Atsuhiro Doke, Ying Shi, Changru Cai