Vibration damper
US5738191A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Apr 5, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/516
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vibration damper having a pressure tube in which a piston with a piston rod is located so that the piston can move axially. The pressure tube is divided into upper and lower working chambers. The upper working chamber is connected by a hydraulic connection to the oil sump of an equalization chamber. The vibration damper also has at least one damping valve in the piston at least for the direction of flow from the upper working chamber to the lower working chamber, a port valve between a connection opening in the upper working chamber and the oil sump, a non-return valve in a bottom valve body which connects the lower working chamber with the equalization chamber and at least one additional damping valve in addition to the piston valve(s). In the insertion direction, the additional damping valve produces a damping which occurs as a function of the volume flow distribution. As a result of the flow resistances in the valves, there is a superimposed pressure damping of the valves, whereby a maximum of the displaced volume of the lower work chamber and a minimum of the volume displaced by the piston rod flows through the damping valve. The flow resistance inside the hydraulic connectio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.