Solenoid actuator
US9799437B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Dec 9, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1692
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plunger is formed of a soft magnetic material to have one end connected a regulation pin. A permanent magnet is affixed to a stationary portion to attract the plunger in a retreated direction. A coil generates a magnetic flux in an opposite direction of the permanent magnet to reduce a magneto attraction force, which attracts the plunger. A spring biases the regulation pin in an advanced direction. The spring applies a biasing force to the regulation pin to move the regulation pin in the advanced direction when electricity is supplied to the coil to reduce the magneto attraction force of the permanent magnet. A molded portion defines a magnet accommodation hole and a cover member covers the permanent magnet housed in the magnet accommodation hole. A magnetism detection unit is disposed on an opposite side of an inner surface of the cover from the permanent magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.