Solenoid operated pressure control valve
US4917150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Jul 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86702
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A solenoid actuated valve for regulating the fluid pressure at a control port by cyclically connecting the control port alternately to a fluid pressure supply source and to a sump includes a sleeve-like valve member slidably mounted on a fixed valve member for movement between two positions in response to energization or deenergization of the solenoid coil. The valve sleeve is the armature of the solenoid and operates within an internal chamber in the valve housing with pressure within the chamber balanced against its opposite ends. Energization and deenergization of the solenoid coil may be controlled by a processor which supplies a pulse width modulated electric control signal variable in response to processor inputs to establish a control port pressure which is accurately linearly related to the time duration of the pulse width modulated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.