Ball screw and nut assembly with a nut having a preloaded wiper thread and method of its manufacture and operation
US6237434A · kind A · utility
10Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Aug 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19902
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball screw and nut linear actuator has a screw and nut with helical grooves and threads providing a helical raceway between them. The raceway has a ball return portion and provides a track for a train of recirculating load bearing balls. A wiper member carried by the nut has a helical wiper thread which is preloaded to engage an outer side of the helical groove of the screw outboard of the nut. The helical wiper thread has a radially open helical groove for maintaining and distributing a helical ribbon of lubricant on the side of the screw groove upon which it is pressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.