Patents by Inventor Masuji Oi

Masuji Oi 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).

  • Flowing-down rainwater flow-separating pipe
    Patent number: 5681455
    Abstract: An upper end of an outer pipe 16 is connected to a gutter, and a lower end of the outer pipe is connected to a water collecting box communicating with a sewer pipe. An inner pipe 18 which is arranged apart from an inner circumferential surface of a vertical portion 16d of the outer pipe at an outer circumferential edge of an upper portion thereof is connected to a storage-percolating box at a lower end thereof. A ring-like flow-separating piece 24 is disposed on an inner circumferential surface of the vertical portion of the outer pipe above an outer end of the inner pipe by a predetermined distance.
    Type: Grant
    Filed: April 11, 1996
    Date of Patent: October 28, 1997
    Assignees: Totetu Mfg. Co., Ltd., Masuji Oi
    Inventors: Seiichiro Takai, Masuji Oi