Flow control valve
US9074702B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2009 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jan 17, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0613
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A linear type flow control valve includes a spool valve element fitted in a valve housing, and having a characteristic of an output flow rate such that a positive output flow rate increases after a negative output flow rate decreases toward zero and pass a neutral point on which the output flow is zero with an increase of the shifting stroke of the spool valve element. The flow control valve includes a damper chamber and a restricting section. The restricting section forms a restricting flow passage having a larger flowing cross-sectional area of the working fluid when the spool valve element assumes a shift position on a positive output flow rate side of the neutral point of the spool valve element than that when the spool valve element assumes a shift position on a negative output flow rate side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.