Expanding gripper with elastically variable pitch screw
US5839769A · kind A · utility
23Cited by
24References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K13/0478
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An expandable gripper for semiconductor processing equipment that allows the pitch between semiconductor chips to be adjusted. To adjust the pitch, several pick and place mechanisms are mounted around a shaft using nuts. The threads of the nuts have variable leads, causing each to travel a different amount as the shaft rotates. All of the threads engage the shaft because a compliant layer is attached to the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.