Rolling element screw device
US8375815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Apr 9, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19767
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rolling-element screw device includes: a large number of rolling elements; a screw shaft having an outer periphery on which a rolling groove for the large number of rolling elements is helically formed; a nut member which has a through-hole through which the screw shaft is passed and which is threadedly engaged with the screw shaft through intermediation of the large number of rolling elements; a lubricant supply hole formed through the nut member from an outer peripheral surface of the nut member to an inner peripheral surface of the nut member; a lubricant tank mounted to the outer peripheral surface of the nut member and comprising an accommodating chamber for lubricant; and a lubricant applying body standing from the lubricant tank, and inserted into the lubricant supply hole along with amounting operation of the lubricant tank with respect to the nut member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.