Ram boring machine
US5074364A · kind A · utility
4Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jun 1, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/145
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a ram boring machine having a striking piston that can be moved axially in a housing and whose movements are controlled by a control pipe that is connected to a compressed air hose and is mounted in an elastic intermediate piece arranged in the housing, arranging the elastic intermediate piece on the control pipe and/or in the housing facilitates the assembly of the intermediate piece. Furthermore there is less damage to the housing, the control pipe and the compressed air hose and even the control pipe can be mounted and disassembled easier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.