Air spring for controlling the level position of a driver's cabin or a motor vehicle
US11059341B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2019 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Jun 17, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2228/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air spring includes a closing member, a rolling piston, and an air spring bellows connected to the rolling piston and the closing member to form a fluid-filled pressure chamber. A level control system for supplying and/or discharging fluid may be integrated into the pressure chamber to control level position based on air spring stroke. The level control system may have a control valve and an actuator connected to the control valve. The actuator may include a guide tube coupled to the rolling piston or closing member, and movably arranged within the pressure chamber. An actuating member may include a pin member and may operate the control valve. A compression spring may have a central spring and a biasing spring, and the guide tube may include a control flange coupled to the pin member, and the biasing spring may be supported to press the pin member against the control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.