Displacement transducer to identify the position of a pressing plunger
US5644227A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Jan 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piston rod (2) of a piston-cylinder unit (3) carries at the top a pressing plunger (not shown) of a glass forming machine and is guided in a guide sleeve (22). The guide sleeve (22) is seated in a magnetically conductive support sleeve (20) of a retaining flange (14). The support sleeve (20) carries an external coil (27) whose connecting wires (30) are guided outwardly to a plug socket (37). On the top of the piston (6) is fixed an internal flange (39) of a circular annular metallic actuating member (40). At the uppermost end of the pressing stroke of the piston (6) the actuating member (40) enters into an annular chamber (29) around the coil (27) and thereby changes the inductance of the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.