CAD/CAM device with hierarchical data structure
US5272642A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Apr 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2219/2021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The CAD/CAM device includes a layer table 9 tabulating the layers each including the attributes 18 for the layer and the other-layers referencing information 19 for other layers. By establishing correspondence from the figure elements, the three-dimensional curves, and the three-dimensional forms to respective layer data, the figure elements, the three-dimensional curves and the three-dimensional forms are maintained hierarchically via the layer table 9. Further, the respective layer data are given hierarchical name 17. By designating a work layer at the root of a hierarchical tree data structure, all the information necessary for the generation of the NC data can be retrieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.