Multi-stage pulley and production method thereof
US6463659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4946
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An annular groove portion is formed between portions corresponding to groove portions and thereafter the groove portions are formed while the annular groove is pressed. Consequently, since the stress produced due to a plastic deformation in forming the groove portions can be absorbed by the annular groove having a smaller rigidity than the groove portions, no undesirable plastic deformation of the groove portions occurs and hence the accuracy of the finished size of the multi-stage pulley can be improved. Furthermore, the capital investment in groove forming rollers can be reduced and the manufacturing cost of the multi-stage pulley can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.