Control cylinder for a steering system of a motor vehicle
US6206421A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1999 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/3228
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control cylinder is provided in a vehicle steering column arrangement in order to displace two jacket tube parts, displaceable telescopewise with respect to one another, relative to one another. The control cylinder includes a cylinder housing filled with a damping medium and a piston axially displaceable in a cylinder. A flexible sealing lip is provided as a sealing member for a through bore in the piston. The lip in its unloaded resting position leaves the through-flow cross section open. Upon an abrupt relative movement of the piston and cylinder housing, the level of the impact load on the fluid moves the lip into a closed position that at least largely seals off the through-flow cross section, with the deformation resistance of the sealing lip being chosen so that the sealing lip remains in its resting position during normal adjustment between the piston rod and the cylinder housing. Embodiments with multiple through bores and sealing lips are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.