Ball screw apparatus
US7222553B2 · kind B2 · utility
2Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Dec 3, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19777
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention provides a ball screw apparatus which suppresses abrasion and damage by competition of balls, controls spaces between retaining pieces and balls, and prevents retaining pieces from falling, thereby enabling to more improve operating ability. The retaining pieces are positioned between the balls running in a ball rolling path, such that a sum total of the spaces between the retaining pieces and the balls is 50% or less of an outer diameter size of the retaining piece, and at the same time a contact angle between the retaining piece and the ball is 25° or above to 40° or below.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.