Hydraulic swinging-leaf door drive
US6889501B2 · kind B2 · utility
4Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2003 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Jun 23, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7053
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic swinging-leaf door drive for swinging doors includes an actuating piston, which acts on a drive shaft. A hydraulic pump acts on the actuating piston by way of a hydraulic circuit. The hydraulic circuit is designed as a closed circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.