Solenoid valve with ball attracted towards seating because of negative pressure
US5556175A · kind A · utility
26Cited by
18References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/028
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When oil flows from within a seat valve along an oil path in a valve, structure is such that a negative pressure is generated to draw a ball in the direction of the seat valve. That is, the force in the direction of valve closure is actively utilized, the valve does not perform a full stroke in a certain differential pressure range, and increases in a pulsed manner in a minute-stroke state, i.e., in a state where the passage cross-sectional area of the valve is small. Therefore, effective control becomes possible without a large pressure increase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.