Patents by Inventor Yongsheng Cai

Yongsheng 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).

  • Backbone-type framework for tents or houses
    Patent number: 5238014
    Abstract: A backbone-type framework for tents or houses, comprising a rope, a plurality of backbone links connected in series by said rope; a hand winch located at one end of said framework to tension or release the rope; a rope-reverser located at the other end of said framework; each of the backbone links comprises a tube link and two end caps, said end cap has tube portion and an end plate, said tube portion can be inserted into said tube link, said end plate has two holes, the outer end surface of said end plate is oblique.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: August 24, 1993
    Assignee: China Shenyang Damo Camp Equipment Institute
    Inventor: Yongsheng Cai