Solenoid and solenoid valve
US6076550A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1997 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8122
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A solenoid comprising a solenoid coil having a longitudinal hole at the center of a bobbin made of a non-magnetic material and a coil winding wound around the peripheral wall of the bobbin. A yoke comprising a peripheral side plate, an upper end plate and a lower end plate all for the covering the outer peripheral surface and both end surfaces of solenoid coil, a pole core disposed at one end of the longitudinal hole and a plunger fitted slidably into the other end of the longitudinal hole. The solenoid further comprises a protrusion member for forming an irregular magnetic field, formed integrally at the center of the yoke, and a recess for fitting the protrusion member from the end surface of the peripheral wall of the bobbin formed in the peripheral wall. A diaphragm of a solenoid valve for opening and closing a main valve port, opened and closed by the movement of the plunger operating at a constant stroke above a predetermined feed water pressure and at a stroke proportional to the water drainage pressure below the predetermined feed water pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.