Proportional control valve
US9360027B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2012 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jun 10, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/0435
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A proportional valve including a housing having an inlet and an outlet, and a valve element movably positioned in the housing between the inlet and the outlet. The valve element having a pilot valve opening, a first pressure chamber with a pressure acting on the valve element in a first direction, and a second pressure chamber with a pressure acting on the valve element in a second direction opposite to the first direction. A pilot valve element actuated by a drive mechanism to cooperate with the pilot valve opening to form a pilot valve. A flow resistance between the inlet and the first pressure chamber is smaller than a flow resistance between the inlet and the second pressure chamber. The pilot valve opens into a third pressure chamber connected to the outlet via a throttled flow path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.