Chisels
US9333635B2 · kind B2 · utility
11Cited by
111References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Dec 11, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/89
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A chisel includes an elongate shank portion composed of a first steel, and a working end portion composed of a second steel that is different than the first steel. The working end portion is joined to the shank and configured to chisel a workpiece. The joined shank portion and working end portion has been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.