Patent ID: 11959248
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC B  E

Claim 0:
1. Device for the in situ underwater removal of a layer of sludge and/or sand from the bottom of a wetland, the device containing:
a diving bell with an open bottom and a lower free edge;
means of driving the diving bell with the lower edge to a desired depth into the layer of sludge and/or sand to be removed;
a dredge pump installed in a space of the diving bell and provided with an inlet for pumping up the sludge and/or an outlet to which a pipe is connected for pumping the pumped up sludge and/or sand to a collector;
a compressor for pumping gas under pressure into the space of the diving bell during dredging,
wherein the diving bell is also provided with a gas outlet for the compressed gas, the gas outlet being mounted to a float that is configured to float on the sludge and/or sand making the gas outlet adjustable in height in the diving bell.