Height control valve with integral dump device
US6089551A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Feb 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S267/01
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A height control valve including a leveling valve integral with a dump valve for controlling air flow to and from an air spring supporting a vehicle frame above an axle is disclosed. The height control valve includes a valve body defining first and second internal chambers. The leveling valve is defined by a leveling seal assembly received within the first internal chamber. The leveling seal assembly controls fluid flow into the first internal chamber through an intake port and fluid flow out of the first internal chamber through an exhaust port. The leveling seal assembly includes a rocker arm alternatively engagable with intake and exhaust pins which are adapted for sealingly engaging the intake and exhaust ports, respectively. Pivoting movement of the rocker arm results in one of the intake and exhaust pins being forced away from the respective intake or exhaust port resulting in fluid flow therethrough. The dump valve includes a dump seal assembly received within the second internal chamber and selectively moveable between a normal operating position and a dump position by an actuator. During the normal operating position the air spring is in communication with the first intern…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.