Positioning apparatus
US5180955A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1990 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Oct 11, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for positioning an end-effector comprising a multi-bar linkage drive mechanism. The drive mechanism has a base structure of a movable arm structure. The moveable arm structure has four arms arranged in a general parallelogram profile with a center of gravity at a main shaft located at a connection of two of the arms. Two of the arms have energizeable electromagnetic coils and the base structure has permanent magnets for moving the arms. Analog and/or digital position sensors can be used. Dynamic balancing can be provided to produce reactionless ultra-high speed X-Y motion. A torque cancellation motor for cancellation of Z-axis moments produced by these coils can be provided. A Z-direction actuator can also be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.