Device for determining the position of a scraper
US7075053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2003 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Jun 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L2101/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for determining the position of a scraper which is displaceable for the transport of coating material in a supply path of thereof, the coating material comprises a sensor responding to the presence of the scraper. This sensor is accommodated in a separate measuring head, which contains an inner, self-sufficient current source and a circuit arrangement which generates an electric output signal indicating presence or absence of the scraper on the sensor. The information in this output signal is conducted by means of a device, which manages without galvanic connection, preferably via an optical waveguide, to an evaluation circuit, electrically insulated at a distance from the measuring head and which generates an electric output signal used for controlling other parts of the plant. A device of this kind can also be used for detecting scrapers where, as frequently in electrostatically operating coating plants, the sensor has to be attached at a point located at high electric potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.