Air check valve for an air spring
US5669418A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Jul 25, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/144
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a check valve for an air spring which has a supply line through which air is supplied. Even after the supply line is disconnected, the pressure in the air spring should not drop below a certain minimum pressure. When refilling and during storage, a defined position of the flexible member should be provided. The air check valve 4 includes a valve body 8, a valve housing 6 and an elastic valve plate 10. The valve body 8 functions as a base plate and has a concentric ring-shaped sealing edge 24 to impart bending stress to the elastic valve plate 10. The valve body has a bore 30 disposed outside of the ring edge 24. The valve housing 6 has a ring-shaped depression 32 corresponding to the ring edge 24. The valve plate 10 has a center bore 22 which communicates with an air connection 28 via a channel 26 disposed in the valve housing. The peripheral portion of the elastic valve plate 10 is clamped between profiles (18, 20) of the valve body 8 and the valve housing 6. The air check valve can be used in all types of vehicle air springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.