Percussive tool with high pressure fluid jet
US4736808A · kind A · utility
1Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Oct 14, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C27/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a percussive tool in which a very high pressure and preferably cavitating water jet is directed through an opening in the working surface of the tool, the jet is formed by a nozzle positioned in a cavity behind the opening and decoupled from the tool by a bearing layer of water from the jet. A supply pipe extends rearwardly of the nozzle without contacting the tool, and is supported externally of the tool, on a machine which operates the tool, by a support which allows the fluid bearing to center the nozzle within the cavity while restraining movement of the nozzle axially of the tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.