Reversible percussion device for percussion tool
US4718500A · kind A · utility
9Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Feb 3, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D9/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A fluid impact tool of the type known as a percussion or rock drill characterized by a percussion mechanism which provides alternative reverse percussion to assist in drill string removal or recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.