Chisel for a percussive tool
US4280572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1979 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Mar 8, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/1066
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A percussive tool, particularly a chisel for percussive working in rock, has a body portion, and a nozzle arrangement in the body portion, which is operative for forming a high-speed flow of a high-pressure fluid, particularly liquid, and directing the same to a working region of the body portion. The nozzle arrangement may include a plurality of nozzle holes which are open into the working region. It may also include at least one nozzle hole and at least one nozzle directing the flow of fluid into the nozzle hole. The nozzle may be supported by a supporting member which has an inner passage and extends from an inner chamber of a head section of the body portion into a receiving recess of a shaft section of the latter. The supporting member may be adjustable in the direction of a longitudinal axis of the chisel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.