Direct operated cartridge valve assembly
US7766042B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2006 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Nov 30, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8667
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A cartridge valve assembly includes a body having a central bore, a first port, a second port, and a third port fluidly connected to the central bore. The cartridge valve assembly further includes a main spool positioned within the central bore and being movable between at least a first position and a second position. The main spool forms, within the central bore, a first chamber, and a second chamber, and a control chamber. The cartridge valve assembly also includes a first passage fluidly communicating the first chamber with the second chamber, and an actuator adapted to apply a force to a first end of the main spool. The cartridge valve assembly further includes a feedback spool having an end exposed to a feedback chamber formed within the body, and a second passage fluidly communicating the control chamber with the feedback chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.