Patents by Inventor Masazumi Sawa

Masazumi Sawa 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: 20040035172
    Abstract: For example, in hemming processing that is performed along the peripheries of an automobile door panel, conventionally, a bent portion of the panel formed by flanging processing is previously bent at an angle of approximately 45°, and then is finally bent by changing a posture of a bending roller and rolling thereto again. Therefore, it is difficult to shorten time for hemming processing. It is one object of the present inventions to complete hemming processing in only one rolling step, to thereby reduce working time for hemming processing.
    Type: Application
    Filed: April 7, 2003
    Publication date: February 26, 2004
    Inventor: Masazumi Sawa
  • Patent number: 6477879
    Abstract: In a prior art roller type processing apparatus for processing a workpiece by roll pressing a roller, the roller is roll-pressed at the same location a number of times. Thus, longer processing time is required compared to processing using pressing dies. It is, accordingly, an object of the present invention to reduce the processing time by providing a roller type processing apparatus. Therefore, in the present invention, rollers 13, 14 are attached to a plurality of independently controllable robot arms 11, 12, respectively, and the rollers 13, 14 are successively roll-pressed along a portion to be processed We of a workpiece W in different rolling positions.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: November 12, 2002
    Assignee: Tri Engineering Company Limited
    Inventor: Masazumi Sawa
  • Patent number: 5267387
    Abstract: A method for hemming a workpiece having an upturned edge, wherein the workpiece is composed of an outer panel having a peripheral upturned edge turned substantially at a right angle, and an inner panel having a peripheral edge superimposed on the outer panel adjacent the upturned edge. The upturned edge of the outer panel is bent preliminarily by a hem roller which is held on a guide surface of a lower die. The guide surface is so formed that when the hem roller is rotated on the guide surface, the hem roller abuts against the outer periphery of the upturned edge of the outer panel at a point at least a distance 2TO+TI apart from the lower end of the upturned edge toward the distal end thereof, wherein TO is thickness of the outer panel and TI is thickness of the inner panel. The hem roller is then shifted by a robot hand to a second position in which the hem roller is parallel to the superimposed portion of the inner panel.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: December 7, 1993
    Assignee: Triengineering Co., Ltd.
    Inventor: Masazumi Sawa
  • Patent number: 5228190
    Abstract: A roller type hemming apparatus for hemming a workpiece having a peripheral bent portion includes a hem roller rotated under pressure along the bent portion of the workpiece, a hem roller support adapted for displaceably supporting the hem roller, and a robot hand adapted for shifting the hem roller through the hem roller support while pressing the hem roller on the bent portion of the workpiece.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: July 20, 1993
    Assignee: Triengineering Company, Ltd.
    Inventor: Masazumi Sawa
  • Patent number: 5224253
    Abstract: A method and apparatus are presented for hemming a workpiece having an upturned edge, wherein the workpiece is composed of an outer panel having a peripheral upturned edge turned substantially at right angles, and an inner panel having a peripheral edge to be superimposed on the outer panel adjacent the upturned edge. The upturned edge of the outer panel is bent preliminarily by a hem roller which is held on a guide surface of a lower die. The guide surface is so formed that when the hem roller is rotated on the guide surface, the hem roller abuts against the outer periphery of the upturned edge of the outer panel at a point at least a distance 2TO+TI apart from the lower end of the upturned edge toward the distal end thereof, wherein TO is thickness of the outer panel and TI is thickness of the inner panel. The hem roller is then shifted by a robot hand to a second position in which the hem roller is parallel to the superimposed portion of the outer panel and the inner panel.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: July 6, 1993
    Assignee: Triengineering Co., Ltd.
    Inventor: Masazumi Sawa