Control valve apparatus and pressure circuit
US7175155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2005 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Jun 14, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7054
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member is in a closed state, when the pressure in the inlet chamber is higher, a pressurized medium is introduced to the control pressure chamber via a first valve unit and is cut off from the outlet chamber by a second valve unit. When the pressure in the outlet chamber is higher, the pressurized medium is introduced to the control pressure chamber via the second valve unit and is cut off from the outlet chamber by the first valve unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.