Electromagnet and electromagnetic valve coil assemblies
US4641118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Jan 30, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F17/0013
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnet including a coil unit having a plurality of electrically insulative substrates, each having a spiral conductor formed thereon, the substrates being stacked together with the spiral conductors parallel with each other. The conductors of the unit are connected in series with each other so that magnetic fluxes formed of electric currents flowing through the conductors are directed in the same direction at the central positions of the spirals of the spiral conductors, and there are formed holes at the central positions for receiving a ferromagnetic core which is moved in response to a direct electric current passed through the coil unit. A valve may be connected to the ferromagnetic core to form an electromagnetic valve assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.