Method of manufacturing a shaft having a fluid flow passage
US6089068A · kind A · utility
1Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1999 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | May 26, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21H3/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a shaft having below a surface thereof a flow passage, through which a fluid can flow, includes a preliminary step of forming in a surface of a columnar-shaped base material grooves having a substantially U-shaped cross section, and a finishing step of compressing crests of thread ridges between the adjacent thread grooves in a direction, in which the base material is reduced in diameter, to perform plastic deformation and join the deformed crests to one another to form a spiral-shaped, closed space which communicates the spaces in the thread grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.