Driving shield
US4368924A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Apr 23, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/0875
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A driving shield having a shield shell and a transverse wall for defining a work chamber, and a removal arm pivotally journalled on the transverse wall. The removal arm has a removal tool for mining or removing a face wall which also delimits the work chamber. A pressure medium supply is provided for attaining a support pressure in the work chamber. Material worked away from the face wall is removed by a discharge conduit arranged essentially along the bottom of the shield shell. The work or material-removing arm is journalled on the transverse wall in the pneumatic pressure duct, and the pressure medium supply is embodied as a pneumatic conduit. A sealing medium application device is movably coupled with the work arm, and the delivery nozzle of the device is directed upon the immediate surroundings at the free end of the removal tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.