Multiple stage, multiple extend, speed reducing ball screw linear actuator and method of constructing and operating the actuator
US6761080B2 · kind B2 · utility
13Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Mar 12, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19744
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A multiple extend ball screw and nut linear actuator incorporates a revolvable axially restrained ball screw with a ball nut thereon. A constant speed reversible drive revolves the screw to move the ball nut forwardly and rearwardly. External helical threads of the same hand as the ball nut threads are provided externally on the ball nut but have a substantially reduced lead. A second rotatably restrained nut having threads matching the external threads on the ball nut mounts on the ball nut and connects to the system to be actuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.