Actuator device with intermediate rollers
US7000495B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2003 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jan 21, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19795
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Actuator device comprising a support (2); a longitudinal drive rod (8), part of the rear end (9) of which is mounted and rotates inside the support, and of which a front end section (17) has an external screw thread (18) and on its annular section, gear teeth (19); a longitudinal sheath (39) positioned around and coaxially to the drive rod has an internal screw thread; a series of rollers (28) positioned longitudinally between the drive rod and the sheath and having an external screw thread engaged with the external screw thread of the drive rod and with the internal screw thread of the sheath, and gear teeth engaged with the gear teeth of the drive rod. The helix angle of the screw thread of the rollers is equal to the screw thread helix angle of the screw thread of the drive rod, and different from the helix angle of the screw thread of the sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.