Solenoid with tolerance control
US4528534A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1984 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | May 31, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/1607
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoid is provided having a simplified construction which minimizes the expense of manufacture and which gives precise, uniform and reliable performance. The solenoid includes a bobbin defining an armature bore and including a collar portion of substantially less axial length than the bore. The collar portion defines a passage of reduced transverse dimension relative to the remainder of the bore. The solenoid's plunger fits closely in the collar portion of the bore and loosely in the remainder of the bore. The collar portion, thus, minimizes the "chatter" or lateral movement of the plunger and the remainder of the bore accommodates any deformations that may occur during manufacture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.