Percussion tool
US8955616B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | May 28, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/231
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic percussion tool (1) for demolition and/or breaking work is connectable to an insert tool (2). The percussion tool has a percussion cylinder (4), a piston (5), arranged to travel in the bore of the cylinder (4), a buffer (8), and a valve unit (6), acting on the piston (5) during operation to produce a repetitive reciprocating motion in the bore of the cylinder (4) by alternately applying pressure to the upper or lower end of the cylinder (4) while the insert tool (2) is influenced by the stroke of the piston (5) at its dead center at the lower end of the cylinder (4). The percussion tool prevents the reciprocating motion of the piston when the buffer (8) reaches a predetermined degree of wear and the tool is not pressed against any object being worked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.