Constant force solenoid
US3987385A · kind A · utility
25Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoid in which the coil is positioned inside a housing of magnetic material. The housing has a tubular projection forming a recess in the inside of the end wall along the axis of the coil, one end of the plunger projecting beyond the coil into the recess when the plunger is in the energized position. The portion of the plunger that extends into the recess is tapered to obtain a constant force-displacement characteristic for the full travel of the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.