Patents by Inventor Hui Lang Cai

Hui Lang 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).

  • Upper-layer cleaning device for water treatment device, and method for cleaning water treatment device filter layer
    Patent number: 9573082
    Abstract: Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter medium of the lower layer; a water collection pipe (13) removing filtered water and supplying reverse cleaning water to the filter layer during reverse cleaning; drainage trough (12); and upper layer cleaning apparatus (10), in which the upper layer cleaning apparatus includes upper layer cleaning pipe support member (17), upper layer cleaning water pipe (18), surface-cleaning special air mixing nozzles (19), air suction pipe (20), and horizontal air pipes (31 and 32) and the raw water special air mixing nozzles (7) are attached to raw water inflow tank (70) provided on a part of the drainage trough (12).
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: February 21, 2017
    Assignee: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Tadao Oiwa, Hui Lang Cai
  • UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER
    Publication number: 20140190907
    Abstract: Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter medium of the lower layer; a water collection pipe (13) removing filtered water and supplying reverse cleaning water to the filter layer during reverse cleaning; drainage trough (12); and upper layer cleaning apparatus (10), in which the upper layer cleaning apparatus includes upper layer cleaning pipe support member (17), upper layer cleaning water pipe (18), surface-cleaning special air mixing nozzles (19), air suction pipe (20), and horizontal air pipes (31 and 32) and the raw water special air mixing nozzles (7) are attached to raw water inflow tank (70) provided on a part of the drainage trough (12)
    Type: Application
    Filed: July 5, 2012
    Publication date: July 10, 2014
    Applicant: NAGAOKA INTERNATIONAL CORPORATION
    Inventors: Hitoshi Mimura, Tadao Oiwa, Hui Lang Cai