Self-pumping hydropneumatic vibration damper
US7681699B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2006 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Jan 1, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/5126
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A self-pumping hydropneumatic vibration damper with internal level control, especially for motor vehicles, has an oil-filled working cylinder under the pressure of at least one gas cushion. The working cylinder is divided into two working spaces by a working piston mounted on a piston rod. A piston pump, which is driven by the sprung movements of the vehicle and thus conveys damping oil from a low-pressure chamber into the working space connected to the high-pressure chamber. The pump cylinder of this piston pump is formed by the hollow piston rod, which connects the working space connected to the high-pressure chamber to the low-pressure chamber. An axially movable stepped pump piston is provided in the pump cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.