Surface-chiseling machine
US4594759A · kind A · utility
Inventor
Key dates
| Filing date | Aug 14, 1985 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Aug 14, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4589
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A surface-chiseling machine for refractory, concrete or other materials is disclosed, which includes a piston having at its one end a step portion and on a side periphery at its other end a through-hole, and a cylinder forming a first air chamber on a closed side of the step portion of the piston, forming an exhaust channel communicated with the through-hole of the piston and having an air hole for feeding a compressed air to the first air chamber. The cylinder at its rear end is closed with a back head for forming therein a second air chamber, while at its front end is closed with a front head which is provided with a plurality of chisel-inserting holes, into which are inserted chisels with their rear ends being contactable directly with a front face of the piston for providing a striking action on the chisels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.