Impact tool
US8069929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Dec 31, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/026
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact tool includes: a spindle disposed in a housing; an anvil disposed in front of the spindle and rotatably supported by the housing through a metal bearing, a rear surface of the anvil having a bearing hole in which a front end of the spindle is received; an impact mechanism configured to transmit a rotation of the spindle to the anvil; an outer groove formed on an outer periphery of the anvil and opposed to the metal bearing; and a connecting opening radially extending in the anvil and connecting the bearing hole and the outer groove to provide a communication therebetween. The outer groove is formed to have a depth in the range of 3-10% of an outer diameter of the anvil, and the connecting opening opens at a rear end of the outer groove in an axial direction of the anvil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.