Linear actuator and rocking controller for railway vehicle
US8601952B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 2011 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jun 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18664
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The linear actuator has a hollow main body having open and closed ends, a cylinder fixed to a closed side in the body and having an open end at open side, a linear motion rod having one end extending from the open end of the body and a wear ring on an outer circumference of the other end and slidably housed in the cylinder, and a hollow shaft rotatably supported in the body, wherein the shaft has magnet on outer circumferential surface, a winding section included on an inner surface of the body and the magnet configure a hollow motor, a nut coaxially fixed to the shaft and a screw on an outer surface of the linear motion rod are engaged with each other to configure a rotation/linear motion converter, and oil seals seal a gap between the shaft and the body in both sides are included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.