Patents by Inventor Yasumasa Kawashima

Yasumasa Kawashima 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).

  • Patent number: 6912445
    Abstract: A method for detecting shapes that are undesirable for efficient processing and which occur from tolerance conversion by comparing a geometric relationship of shape elements obtained from shape data before tolerance conversion with a geometric relationship of the shape elements obtained from shape data after tolerance conversion. An inappropriate shape is identified when the compared geometric relationships are not the same.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: June 28, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Koji Shiroyama, Shunsuke Minami, Yasumasa Kawashima, Kyu Kabata, Nobuhisa Seya
  • Publication number: 20020015036
    Abstract: A method for detecting shapes that are undesirable for efficient processing and which occur from tolerance conversion by comparing a geometric relationship of shape elements obtained from shape data before tolerance conversion with a geometric relationship of the shape elements obtained from shape data after tolerance conversion. An inappropriate shape is identified when the compared geometric relationships are not the same.
    Type: Application
    Filed: February 28, 2001
    Publication date: February 7, 2002
    Inventors: Koji Shiroyama, Shunsuke Minami, Yasumasa Kawashima, Kyu Kabata, Nobuhisa Seya
  • Patent number: 5712654
    Abstract: To edit data, a plurality of automatic processes are defined. Icons representing those processes may be displayed in a library frame of a display of the data editing system. The user may then select one or more of those processes by moving the corresponding icon from the library frame to an editing frame which also displays an image representing the data to be edited. When the user edits the data, each selected automatic process monitors the relationships between the data wherein, the corresponding icon provides a visual indication of the status of the automatic process. Preferably the progress of the automatic process is indicated by changes in the appearance of the corresponding icon. A generation frame may be provided on the display so that the user can generate new processes, represented by a corresponding icon, which may then be moved to the library frame or the editing frame. Icons may be grouped to permit simultaneous selection of a group of corresponding automatic processes.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: January 27, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Yasumasa Kawashima, Shiro Nonaka, Shinji Tokumasu, Takayuki Ishikawa, Motomi Odamura
  • Patent number: 5692115
    Abstract: In order to generate a two-dimensional image of an object, three-dimensional model data is used. Drawing rules are stored which correspond to features of the object. Each drawing rule corresponds to a two-dimensional representation of the corresponding feature when that feature is viewed from a particular viewing direction. The drawing rule corresponds, in each case, to a predetermined visual presentation or appearance of the feature from the corresponding viewing direction. The user then selects the viewing direction and the two-dimensional image is generated using the model data and the appropriate drawing rule or rules. In this way, a feature of the object may be shown in the two-dimensional image with a visual presentation or appearance which is appropriate even if the visual presentation or appearance does not result from the model data. The feature may then be shown in a way which corresponds to the purpose to which the two-dimensional image is to be put.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: November 25, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Kumiko Itoh, Yasumasa Kawashima, Tomotoshi Ishida, Naoyuki Honda
  • Patent number: 5621872
    Abstract: A curved surface generated on a closed curve is expressed by an equation of a film having a physical property. The film is considered as a virtual elastic film generated on the closed curve. A curved surface is generated on the closed curve through changing the shape of the elastic film by operator's setting of both the mechanical force of the elastic film and the normal direction of the elastic film on the closed curve.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: April 15, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Shinji Tokumasu, Shiro Nonaka, Yasumasa Kawashima, Takayuki Ishikawa, Norihiro Nakajima
  • Patent number: 5604886
    Abstract: The design work is to perform various investigation for design data while displaying it on a display screen to make subdivision and concretization thereof. Thus, the design work is a combination of a plurality of design stages in general. Accordingly, the design work is described for each design stage to improve work efficiency. Actually, a design supporting apparatus includes a device for setting the design stages clearly, a device for preserving the setting, a device for setting relation between the design stages, a device for deciding the design stages dynamically, and a device for relating the design data to the design stages for preservation thereof in addition to processing and editing function of the design data provided in the design supporting apparatus.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: February 18, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Yasumasa Kawashima, Shiro Nonaka, Shinji Tokumasu, Takayuki Ishikawa
  • Patent number: 5485560
    Abstract: A drawing information processing method and system adapted to offer a plurality of types of standard display results for each object to-be-displayed through instructions. Data for specifying the form of the object to-be-displayed, and display method data for stipulating a display method showing how the object to-be-displayed is displayed, are stored so as to correspond to each other. The display method data includes data for designating, for example, a display direction, display range, and display position or the like. A plurality of sets of display method data are stored. For displaying, one data which represents a desired status may be selected from a plurality of displaying method data to display the object to-be-displayed in the selected form based on the selected data.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: January 16, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Tomotoshi Ishida, Shunsuke Minami, Yasumasa Kawashima, Hiroshi Arai, Takeo Yamada, Shigeru Arai
  • Patent number: 5353395
    Abstract: A pattern processing method is provided which performs the following steps with regard to a region in an n-dimensional space: providing a procedure (relative expression procedure) for generating relative positional data of any desired point in the n-dimensional space with respect to the region by the use of a series of data determining the region (the relative positional data including data indicating whether the point is inside or outside the region, the distance from the point to the boundary of the region, etc.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: October 4, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Shinji Tokumasu, Shiro Nonaka, Yasumasa Kawashima, Tomotoshi Ishida, Norihiro Nakajima, Misato Nio, Yoshio Kunitomo, Kenichi Anjyo
  • Patent number: 4992962
    Abstract: An area set operation apparatus effecting a set operation of a plurality of n-dimensional areas positioned in a n-dimensional finite space, wherein n (n.gtoreq.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: February 12, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Tomotoshi Ishida, Shiro Nonaka, Yasumasa Kawashima, Kumiko Itoh
  • Patent number: 4956787
    Abstract: An elimination work simulator has not only a difference operation processor to attain a difference between work object space data and work space data but also a product operation processor to execute a product operation therebetween. Elimination work space data outputted from the product operation processor is sequentially stored; and at least the latent data of the work object space data outputted from the difference operation processor is stored so as to minimize the amount of data to be preserved. When displaying the work object space data, an animation displaying thereof can be conducted in the same or opposite direction of the order of the work operations by appropriately using elimination work space data and work object space data.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: September 11, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Kumiko Ito, Yasumasa Kawashima, Shiro Nonaka, Tomotoshi Ishida