Analog proportional pressure control three-way valve
US5299600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Sep 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86622
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An analog proportional pressure control 3-way valve includes an elongate cylindrical valve housing having an axial through bore defining an interior chamber, one end of the housing comprising an end port opening, a plurality of axially spaced side port openings defining an inlet and an outlet, and an axial opposite end comprising a sleeve end receivable in a solenoid, in use. A valve member is movable in the chamber at the port end for selectively controlling fluid pressure through the chamber between the end port opening and the outlet in the neutral position or between the inlet and the outlet in a regulated position. A solenoid plunger is movable in the chamber at the sleeve end and is operatively associated with the valve member for positioning the valve member. A stop is mounted to the housing at the sleeve end for retaining the plunger in the chamber. A pressure dividing circuit divides regulated pressure between the outlet and the end port opening in the regulated position of the valve member to create an intermediate pressure to balance force from the solenoid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.