High efficiency solenoid
US5162767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/1638
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high efficiency solenoid includes a magnetic material solenoid core, an electrical current conductive coil and a moveable magnetic plunger. The solenoid core has a first end portion, a first face disposed at the first end portion, a second end portion opposite the first end portion and a continuous channel disposed in the first face. The electrical current conductive coil disposed in the channel and arranged so that magnetic flux developed in response to a current in the coil forms a first magnetic pole on the first face interiorly of the channel and a second magnetic pole of opposite plurality on the first face exteriorly of the channel. The plunger has a surface and a facing coextensive relationship to the first face. The plunger is normally biased in a first position to space the surface from the first face to form a gap therebetween. There is no magnetic material which is received through a bore within the solenoid core. Therefore, the magnetic flux when present is bidirectional through the gap so that all magnetic flux exterior of the solenoid core develops a magnetic force substantial orthogonal to the surface to move the plunger to its second position, which is drawn towar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.