Method of making metal ball bats
US6735998B2 · kind B2 · utility
5Cited by
15References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Oct 4, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K17/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for draw forming a desired contour to the outer diameter of a tubular workpiece provides that the selected workpiece have a wall thickness uniform throughout its length or a combination of uniform thicknesses at end portions with a mid portion of a tapering wall thickness. The outer diameter of selected workpiece is reduced along essentially only a part of the starting tubular metal blank by drawing the metal blank only partly through a contoured die or only partly through each one of a succession of contoured dies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.