Linear actuator using radial bearing
US6081050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H19/025
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A extendable/retractable linear actuator includes a rotational driving member having a rotational shaft, a rotational unit engaged to the rotational shaft of the rotational driving member, extended toward a rotational shaft direction, and rotatably driven in accordance with the rotational driving member, a plurality of radial bearings each respectively having a bearing rotation shaft inclined by an angle (.alpha.) against the rotational shaft axis direction, and symmetrically fixed to each opposing and surface of the rotational unit, and a cylindrical movement tube, surrounding the rotational unit, an inner periphery thereof being in contact with the radial bearings. The linear actuator is directed to minimizing the number of parts and decreasing friction between the parts, thereby accomplishing a simplified and cost-effective structure having an operational efficiency due to a small rolling friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.