Patents by Inventor Huan DAO

Huan DAO 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).

  • Publication number: 20150361681
    Abstract: The invention mentions to the complex of concrete spreader (A) and the crane tower (B), including: concrete pump (1), concrete tank (2), to be placed on the ground, sections of tremie pipes (4), (11), (20) and ball bearing (23) are fitted inside the tower sections (12) for use those sections (12) to support tremie pipe sections (11) to stand steadily in the crane tower (B), steel sections (27), (29) are fitted in the lower side of suspension arm (25) and tremie pipe sections (37a), (37b), (37c), (37d) and (37e) are inter-assembled at the lower side of steel bar (29), and steel bar (29) is used for making a guide way for these sleeve sections moving, the tremie pipe sections (77), (82), (84) are fitted with ball bearing (83) and steel hoop (85), the latch structure (88) is fitted in the front and back head of these sleeve sections, the tensile structure of moving sections (37e), (37d), (37c) and (37b) is included an electrical hoist (107), to be fitted into suspension arm (25), cable branches (108a), pulleys (
    Type: Application
    Filed: July 9, 2013
    Publication date: December 17, 2015
    Inventor: Huan DAO