Pantograph type robot arm
US4933531A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Jun 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25J17/0241
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A pantograph type robot arm having a linkage for connecting a movable member such as a movable welding electrode to a support member. The pantograph type robot arm includes two blocks supported by the support member movably in a direction perpendicular to a straight line, toward and away from each other in a symmetric manner with respect to the straight line. The linkage includes a pair of proximal link bars pivotally connected to the blocks such that the proximal link bars are pivotally connected to each other at their intermediate portions, and a pair of distal link bars pivotally connected to the movable member and to the proximal link bars so that the movable member is moved relative to the support member when the two blocks are moved relative to each other. A pivoting mechanism is provided in pivotal connection to one of the distal link bars of the linkage and the movable member, for effecting a relative pivotal movement of the one distal link bar and the movable member, by an angle equal to an angle of pivotal movements of the one distal link bar, in a direction opposite to a direction of the pivotal movements of the one distal link bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.