Solenoid having a plunger non-fixedly adjoining an end of the armature
US4646043A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H50/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoid is disclosed which uses a plastic coil bobbin as the bearing surface for the armature, the body of which extends coaxially through the central cylindrical cavity of the bobbin. Extending into this cavity, from the end opposite the armature, is a plug which is rigidly fixed to the bobbin by an outer housing that surrounds the bobbin and has a skirt which captures a flanged end of the plug. A plunger that extends through an axial bore in the plug floats freely, coaxially of the bobbin. The interior end of the plunger has an enlarged head that is received within a bore in the armature body. A bias spring is situated between this plunger head and a counterbore in the plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.