Bidirectional cartridge valve
US5072752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1991 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Mar 14, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7771
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bidirectional cartridge valve comprises a generally cylindrical valve housing including an end port and a side port each opening into an axial, cylindrical bore defining a valve chamber. A flow control element is movable in the valve chamber between a valve open position to open a flow path between the two ports and a valve closed position to block the flow path between the two ports. The flow control element includes a first passage provided with a first check valve connecting the end port with the valve chamber and a second passage with a second check valve connecting the side port with the valve chamber. A cylindrical pilot seat in the chamber includes a partial, axial bore defining a pilot chamber and an opening through the seat connecting the valve chamber with the pilot chamber. A third passage is provided through the valve housing, provided with a third check valve, connecting the pilot chamber to the side port. A fourth passage is provided through the valve housing connecting the pilot chamber to the valve chamber at a select axial position occupied by the flow control element. A fifth passage is provided through the flow control element, provided with a fourth check valv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.