Combustion type power tool having buffer piece
US7225768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C1/123
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A combustion type power tool having an arrangement avoiding direct striking of a drive shaft against a cylinder head when combustion pressure is exerted. A motor is disposed at the cylinder head and includes a motor body and a drive shaft extending in an axial direction and protruding into a combustion chamber. A fan is connected to the drive shaft to be rotatable within the combustion chamber. A buffer piece made from an elastic material is supported to the cylinder head. The buffer piece is movable relative to the cylinder head in a direction substantially perpendicular to the axial direction. The buffer piece is formed with a through-hole through which the drive shaft extends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.