Patents by Inventor Tokujiro Hayashi

Tokujiro Hayashi 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).

  • Flexible hose, manufacturing method thereof and extruder
    Patent number: 6698457
    Abstract: A flexible hose which has a hose body made of soft synthetic resin, a reinforcement made of hard synthetic resin wound spirally and joined to the hose body by fusion, and a conductor arranged inside the reinforcement in its longitudinal direction. The conductor does not adhere to the reinforcement and is movable. The hose body is formed by: extruding a tube made of soft resin from a head of an extruder; pressing and flattening the tube to form a strip; and winding the strip spirally with the adjacent side edges joined together.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: March 2, 2004
    Assignee: Tigers Polymer Corporation
    Inventors: Tokujiro Hayashi, Noriaki Fujimoto
  • Flexible hose, manufacturing method thereof and extruder
    Publication number: 20020003003
    Abstract: A flexible hose which has a hose body made of soft synthetic resin, a reinforcement made of hard synthetic resin wound spirally and joined to the hose body by fusion, and a conductor arranged inside the reinforcement in its longitudinal direction. The conductor does not adhere to the reinforcement and is movable. The hose body is formed by: extruding a tube made of soft resin from a head of an extruder; pressing and flattening the tube to form a strip; and winding the strip spirally with the adjacent side edges joined together.
    Type: Application
    Filed: May 30, 2001
    Publication date: January 10, 2002
    Inventors: Tokujiro Hayashi, Noriaki Fujimoto
  • Flexible hoses and joint structures thereof
    Patent number: 6116289
    Abstract: A flexible hose 1 of the present invention is formed by blocking and interrupting a spiral groove 5 inside a hill 2 of a corrugated hose end portion 1a or 1b (inner surface helical concave portion) to form a closed section 4, or by blocking and interrupting a spiral groove 5 formed outside a valley 3 of a corrugated end portion 1a or 1b of a hose (outer surface helical concave portion) to form a blocked section 4. The flexible hose of the present invention can provide an improved air tightness when connected to a joint, requiring no troublesome steps or treatments.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: September 12, 2000
    Assignee: Tigers Polymer Corporation
    Inventor: Tokujiro Hayashi