Impact tool
US12415256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2024 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | May 16, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F5/001
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact tool includes an output shaft for outputting torque, where the tightening torque of the output shaft to a workpiece is greater than or equal to 700 foot-pounds; and an impact assembly that provides an impact force to the output shaft. A main shaft ball groove includes a first ball groove that extends spirally about a main shaft axis and is concave on an outer surface and a second ball groove that extends spirally about the main shaft axis and is concave on the outer surface. An impact ball groove includes a third ball groove that mates with the first ball groove to accommodate the rolling ball and a fourth ball groove that mates with the second ball groove to accommodate the rolling ball. The included angle α between the first ball groove and the second ball groove is less than the included angle β between the third ball groove and the fourth ball groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.