Dual force ram drive for a screw press
US7997190B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18576
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Precise motion of the ram of a fastener press is controlled by high torque and low torque motors for high speed/low force and high force pressing of the ram by the ram, respectively. The high torque motor means drive passes through a bidirectional overrunning clutch. The clutch is controlled by the relative motion of the two separate motor drive speeds of which are regulated by a controller. The clutching motion is therefore controlled only by the relative speed of its drive versus driven components. This provides an extremely smooth and responsive transition between high speed/low force and low speed/high force operation of the ram so that the pressing cycle can be as fast and efficient as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.