Linear actuator
US4012778A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1975 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Nov 19, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18528
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A linear actuator for selectively moving an assembly relative to a support frame along a predefined linear path. The linear actuator includes a drive shaft having a cylindrical surface, means for rotatable mounting the drive shaft to the frame for rotation of the drive shaft about the axis of the cylindrical surface, and means coupled to the drive shaft for rotating same about such axis. A carriage forms part of the assembly with the remainder of the assembly being mounted to the carriage and including a roller. Means are included for mounting the roller to the carriage with the roller being rotatable about a first axis and pivotable about a second axis perpendicular to the first axis. Means are also included for mounting the carriage to the support frame with the carriage and thus the assembly being movable relative to the support frame along the predefined linear path and with the roller being in frictional engagement with the cylindrical surface of the drive shaft whereby the roller is caused to rotate about the first axis by rotation of the drive shaft when the first axis is parallel to the axis of the drive shaft and is additionally caused to move along the predefined linear p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.