Flow control device
US5983937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Feb 4, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86421
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
First to third openings are formed stepwise in a rotor side wall portion of a flow control valve disposed in a hot water circuit. Third positions (a) and (b) are established between a first position in which a first communication passage for communication between inlet and outlet pipes of the flow control valve is fully closed and a second position in which the first communication passage is fully opened. A duty control is performed so that the rotor reciprocates repeatedly among the above four positions. In this way, in the flow control valve for controlling the amount of the fluid flowing in the fluid passage, the valve colliding noise, the water hammer noise, and the temperature variation in the heating heat exchanger can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.