Fluid flow control valve device
US5887618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Jun 27, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87225
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve device (1) for fluid flow control includes two independent valves comprising two movable valve bodies (4, 5) within two valve spaces (V1, V2), wherein each valve body is controllable against the force of a return spring (7, 8) acting thereon. The invention is distinguished in PA1 that the valve spaces (V1, V2) are located axially with respect to each other in one common housing (2, 3), PA1 that the housing between the two valve spaces is provided with an essentially fixed separating means (6) against which the two return springs are resting, PA1 that the housing comprises a common discharge channel (11) which communicates with the two valve spaces, and PA1 that the device comprises a double one-way valve function (9, 10) in the area of the discharge channel in order to prevent unintentional flow actuation resulting from overflow between the valve spaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.