Normally closed electromagnetic valve
US6774753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | May 13, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/3675
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A normally closed electromagnetic valve has a cylindrical valve housing; a valve seat member; a fixed core; a movable core; a valve body; a return spring; and, a coil, one side of the valve housing being housed in a mounting hole opened on one end of a substrate so as to be restricted in axial movement thereof toward the interior of the mounting hole, wherein a large diameter portion is provided in the axially middle portion of the valve housing, the cylindrical valve seat member forms an annular chamber with the inner surface of the large diameter portion, the annular chamber communicates to the valve chamber, and is fixed to and fitted in one end of the valve housing and communicating holes through which the annular chamber is communicated to the exterior of the valve housing are provided in the large diameter portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.