Screw actuator
US6401557B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18704
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw actuator comprising first and second relatively rotatable members, a screw thread formation in the first member including a helical groove, spherical elements carried by the second member and in rolling engagement in the helical groove to form a ball screw coupling between the first and second members, the groove being of sufficient width to allow the spherical elements to move laterally within the groove, and a brake member carried by the second member and defining a screw thread formation which is received in the groove of the screw thread formation of the first member, the brake member being angularly moveable relative to the second member by rotation of the first member relative to the second member, between a first angular position in which the screw thread formation of the brake member is cooperable with that of the first member, and a second angular position in which the screw thread formation of the brake member is not cooperable with that of the first member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.