Internally lubricated ball screw and nut linear actuator
US6568508B2 · kind B2 · utility
10Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jul 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19991
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball screw and nut linear actuator incorporates an axially extending screw and a nut received on the screw to provide a helical raceway with recirculating load bearing balls. An axially extending member carried by the nut on a surface of the nut radially outboard of the raceway has ball return passages opening to the screws groove extending axially to span different turns of the screw groove. The ports lead to the ball return passages and are supplied with a liquid lubricant by a distributor system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.