Outer ring, drawn cup needle roller bearing, drawn cup needle roller bearing structured body, piston pin supporting structure of engine, crankshaft supporting structure of engine, and 2-cycle engine
US7665899B2 · kind B2 · utility
0Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2006 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Dec 12, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The straightness and parallelism of a track surface on which rollers roll are measured within a range “L2” as a range for measuring the straightness and parallelism. The range “L2” is a range such that L2≧0.8×L when a roller length is “L”. When the dimension from the corner P of the flange on the inner diameter side to the starting point of the range “L2” is “L1”, the dimension “L1” is ranged such that 0.8 mm≦L1≦2 mm. In this range, the straightness of the track surface of the outer ring in the axial direction is not more than 0.008 mm and the parallelism thereof is not more than 0.015 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.