Solenoid operated fluid control valve
US4728916A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Jun 5, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to an improved solenoid operated fluid control valve particularly adapted for use as a vacuum control switch in a motor vehicle. One aspect of this invention is the provision of a coil assembly adapted to be wound and terminated using completely automated processes. This feature is provided through the use of a bobbin structure having protruding coil winding posts which position the start and finish ends of the coil wire. Terminal members are installed onto the bobbin and have terminal contact portions which can be folded onto the wire. Another feature of this invention involves means for reducing noise generated from actuation of the valve device. In conventional solenoid employing a "C" frame member, direct mechanical contact exists between the "C" frame member and another component of the magnetic circuit of the solenoid. In accordance with this invention, a thin annular layer of encapsulation material is provided between bores of the "C" frame member and the associated components of the magnetic circuit. This layer of encapsulation material prevents direct mechanical coupling with the "C" frame component, thus reducing noise generation. Means for calibrat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.