Ballscrew seal
US11725714B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2020 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | Dec 4, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2025/204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ballscrew assembly includes a nut having a first helical groove formed on a radially inner surface and defining an axis, a screw disposed along the axis (X) and within the nut and that includes a second helical groove formed on a radially outer surface and opposed to the first helical groove so as to form a helical raceway. The assembly also includes a plurality of balls disposed in the helical raceway and an annular seal disposed radially between the nut and the screw. The seal includes a resilient body and a layer formed of PTFE and disposed radially between the resilient body and the screw and configured to contact the radially outer surface of the screw. An optional annular scraper is disposed axially adjacent to the seal and is configured to receive fluid at one axial end and expel fluid at a second axial end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.