Pressure fluid operated percussion tools
US4036108A · kind A · utility
1Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Sep 12, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D9/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a percussion tool a means is provided for delaying the manifestation, on a valve means sensitive to such change in pressure, of a change in pressure of the fluid applied to the hammer piston at one end thereof and which drives such hammer piston in its working stroke, the valve means being that means which serves to control the inlet and exhaust parts of the fluid circuit which applies pressure to the other end of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.