Patents by Inventor Masazumi Oba

Masazumi Oba 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).

  • Hollow fiber membrane module
    Patent number: 8197688
    Abstract: There is provided a hollow fiber membrane module (1) comprising: a membrane bundle (20) of a plurality of hollow fiber membranes (10); a cylindrical body (30) housing the membrane bundle (20); a fixing portion (40, 50) in which at least one end of the membrane bundle (20) is fixed to the cylindrical body (30); and a raw water outflow nozzle (34) for allowing raw water to flow out from the vicinity of the fixing portion (40). Raw water supplied into the cylindrical body (30) is allowed to permeate from the outside into the inside of each hollow fiber membrane (10). A soft potting portion (42) has, in its surface to be in contact with raw water, at least one groove (43).
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: June 12, 2012
    Assignee: Hainan Litree Purifying Tech Co., Ltd.
    Inventors: Daichi Sakashita, Yoshihide Kaiya, Masazumi Oba, Kenichi Futami, Junichi Hayakawa, Lianggang Chen, Qing Chen
  • Hollow Fiber Membrane Module
    Publication number: 20090218274
    Abstract: There is provided a hollow fiber membrane module (1) comprising: a membrane bundle (20) of a plurality of hollow fiber membranes (10); a cylindrical body (30) housing the membrane bundle (20); a fixing portion (40, 50) in which at least one end of the membrane bundle (20) is fixed to the cylindrical body (30); and a raw water outflow nozzle (34) for allowing raw water to flow out from the vicinity of the fixing portion (40). Raw water supplied into the cylindrical body (30) is allowed to permeate from the outside into the inside of each hollow fiber membrane (10). A soft potting portion (42) has, in its surface to be in contact with raw water, at least one groove (43).
    Type: Application
    Filed: November 27, 2006
    Publication date: September 3, 2009
    Inventors: Daichi Sakashita, Yoshihide Kaiya, Masazumi Oba, Kenichi Futami, Junichi Hayakawa, Lianggang Chen, Qing Chen