Specialized civil engineering machine, in particular slotted wall milling machine
US12043974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2019 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/246
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a special civil engineering machine, in particular a slurry wall cutter, comprising at least one rotating tool and a tool drive that is arranged within a housing of the special civil engineering machine and is sealed with respect to the environment by means of at least one bearing seal in the region of its shaft exit from the housing to the driven tool, characterized in that the bearing seal comprises at least two separate sealing elements, whose arrangement forms a sealing chamber located between the sealing elements, wherein a pressure compensation device is provided, which controls the chamber pressure in the sealing chamber in dependence on the ambient pressure of the special civil engineering machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.