Adjustable stroke solenoid operated cartridge valve
US5842679A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1684
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lower cost valve results from the use of a single machined part for a valve housing. The housing is made of a non-magnetic material which can be less expensive and eliminates the requirement for screens or filters in automotive applications. Providing a one-piece plunger and pilot valve with a high guiding length minimizes tilting of the pilot. Further, the one-piece housing allows for one common bore for guiding the plunger with the pilot and a poppet. The two ideal concentric surfaces make the poppet outer diameter concentric to the pilot hole. Finally, the use of an adjustable stroke valve eliminates the need for a separate needle valve, providing further cost savings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.