Solenoid valve device and automatic document feeder having such solenoid valve device
US7896336B2 · kind B2 · utility
1Cited by
10References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2009 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Nov 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/086
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solenoid valve and an automatic document feeder using the solenoid valve are provided. The solenoid valve includes a valve body, a valve spindle, a spring, a ring-shaped groove and muffling ring. The ring-shaped groove is sheathed around the valve spindle. The muffling ring is disposed within the ring-shaped groove. When the valve body is magnetized to magnetically attract the valve spindle, the valve spindle is moved within the valve body, and the muffling ring collides with the recess inner wall, thereby reducing collision noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.