Patents by Inventor Deguo Ren

Deguo Ren 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).

  • Autocutting extrusion machine for producing prestressed concrete cored articles
    Patent number: 4718838
    Abstract: The present invention of an extrusion machine for forming prestressed concrete cored slabs includes a mechanism for cutting and core-plugging a molded concrete slab into sections having both ends plugged. The extrusion machine is capable of forming several transverse ribs at intermediate positions along the slab. The mechanism includes a cutting blade, blade cylinder, blade vibrator, supplement feed device, supplement feed plate, supplement feed plate cylinder, a hydraulic system and means for movement of the machine. The extrusion machine is able to produce directly high quality prestressed concrete cored narrow and large size slab units.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: January 12, 1988
    Assignee: Building Machines Developing Company of the Ministry of Nuclear Energy Industry
    Inventors: Deguo Ren, Lu Yonghong