Positioning device for a member and drilling system employing said positioning device
US5353884A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Nov 29, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a positioning device capable of positioning a member in any direction with a high degree of resolution by using a hollow type harmonic drive mechanism, and to a drilling-direction control device for a drilling system utilizing the positioning device. The device of the present invention is mainly constituted by a double eccentric mechanism section (10). A first annular member (12) is rotatably supported by a circular inner circumferential surface (11a) of the cylindrical member (11) of this mechanism section, and a second annular member (13) is rotatably supported by a circular inner circumferential surface (11b) of the first annular member. Further, the circular inner circumferential surface (12b) of the first annular member formed in a position deviated by a distance "e" relative the center of the cylindrical member, and the circular inner circumferential surface (13b) of the second annular member is also formed in a position deviated by the distance "e" relative to the center of the circular inner circumferential surface of the first annular member. It is possible to move the center (C) of the circular inner circumferential surface (13b) of the se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.