Active control system
US6220026A · kind A · utility
5Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7716
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Active control system for a movable member, in particular a tailgate or door, includes a pump unit which is connected by at least one fluid connecting line to a piston-cylinder unit. The control system has an on-off valve through which the direction of motion of the piston-cylinder unit is controlled. A pressure-limiting valve is operable, in emergency conditions, to permit a displacement motion of the piston rod of the piston-cylinder unit by opening a connection to the working chamber of the piston-cylinder unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.