Supporting apparatus
US6158727A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Apr 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K13/0069
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pin table for supporting a workpiece, such as a printed circuit board, while an operation is carried out on it, comprises a base defining a plurality of vertically disposed pneumatic cylinders arranged in a column and row matrix. Each cylinder has a two-position spool valve located axially beneath it in the base for controlling actuation of the cylinder between a position in which the piston rod is fully retracted and a position in which the piston rod is fully raised. The piston rods constitute the pins of the pin table and are selectively movable into their raised positions by the application of compressed air to the cylinders via the spool valves whereby a desired array of raised piston rods may be established.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.