Self-pumping suspension strut
US8840094B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2011 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2500/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A self-pumping suspension strut with internal level regulation, for example for motor vehicles having a fluid-filled working cylinder pressurized with the pressure of the fluid acting as a spring. A hollow piston rod is guided, in a sealed manner, within the working space, into which projects a pump piston attached to the working cylinder. During relative movements between the working cylinder and the piston rod, fluid is delivered from the working space into a pressure chamber in which a pressure is higher than the pressure of the working space. Flow connections between the pressure chamber and the working space selective set a specifiable dynamic level, determined by the extension length of the piston rod, such that the piston rod can be rotated, by a rotating device, for selective cooperation of the axially and the circumferentially spaced flow connections to control flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.