Drive device for a bending press
US9688041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2010 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Feb 24, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B15/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drive device for a bending press, in particular a press brake, with a press frame includes a stationary press beam and has a press beam which can be displaced relative to the press beam by a beam adjusting device formed by a closed hydraulic system including a hydraulic pump with a controllable drive motor, at least one control valve and at least one hydraulic linear actuator. The linear actuator includes a first piston arrangement with a first piston dividing a cylinder chamber into a first pressure chamber and a second pressure chamber and, in another cylinder chamber, a second piston arrangement with another piston and at least one other pressure chamber. The first piston arrangement and the second piston arrangement are coupled with one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.