Impact wrench
US7673702B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2007 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Nov 14, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact mechanism includes a shaft, a hammer and an anvil coupled to the hammer. The shaft has a first helical groove and the hammer has a second helical groove. A ball is received in the first and second helical grooves to rotationally couple the hammer to the shaft and permit axial travel of the hammer relative to the shaft. An axial stop inhibits axial travel of the hammer along a first travel path and permits axial travel of the hammer along a second travel path. The axial stop includes first and second stop members, the first and second stop members having a first relative position to inhibit axial travel of the hammer and a second relative position to permit axial travel of the hammer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.