Manual tool and method for manufacturing the same
US11697859B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 6, 2017 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Mar 12, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a method for manufacturing a manual tool, comprising: performing dual-frequency induction quenching on a first surface of a moment output part or a moment transmission part of the manual tool such that a quench-hardened layer is formed within a first depth range from the first surface of the moment output part to the interior of the moment output part or within a first depth range from the first surface of the moment transmission part to the interior of the moment transmission part, the hardness of the quench-hardened layer being higher than that of the body of the moment output part or the moment transmission part; the dual-frequency induction quenching being configured to simultaneously feed or introduce a high-frequency current and an intermediate-frequency current to the same induction coil to simultaneously heat the first surface of the moment output part or the first surface of the moment transmission part by the high-frequency current and the intermediate-frequency current, and then the moment output part or the moment transmission part being cooled and quenched. The present invention also discloses a manual tool manufactured by the above meth…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.