Piston-cylinder device with position sensing means
US7437988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Jul 18, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D11/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure activated piston-cylinder device includes a cylinder barrel with a cylinder bore, a piston with a piston rod movably guided in the cylinder bore, and a piston position sensing and indicating device. The piston position sensing and indicating device includes a magnetic activating element carried on the piston and an elongate electronic contact free transducer mounted on the cylinder barrel. The cylinder barrel includes a standard type extruded aluminum alloy barrel with an outer channel which extends in an offset parallel disposition relative to the cylinder bore, and a circuit board with electronic components connected to the transducer. The transducer as well as the circuit board are located in the groove in the cylinder barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.