Quick-change ram boring head
US5125462A · kind A · utility
6Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1989 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Dec 4, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/046
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a ram boring machine that has a striking piston reciprocating in a tubular housing and a striking tip that may be formed as a chisel and projects from the housing, connection of the striking tip to the housing by means of a bayonet joint makes installation and removal or replacement of the striking piston or a worn chisel possible in a simple manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.