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US 5,425,188 AGranted
Suction excavator
AssigneeVMB Vesta Maschinenbau GmbH Co. KG
InventorKarl Rinker
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AssigneeVMB Vesta Maschinenbau GmbH Co. KG
InventorKarl Rinker
Estimating the term…
The invention relates to an excavator for suction material, particularly for removing soil from underground pipes. The excavator has a pneumatic elephant trunk for removing the suctioned material and which issues into a storage tank for the suctioned material and to which is connected an exhaust fan. In the storage tank the suctioned material is separated from the suction air flow and is subsequently passed through a filter positioned between an elephant trunk opening and the exhaust fan. In order to ensure a good separation on the part of the filter for a long period of time, the filter is formed by a coarse filter and a fine filter connected to the latter. The coarse filter is formed by a labyrinth or cascade-like flow channel, which is bounded by reciprocally displaced partitions and whose flow cross-section increases in the flow direction. On the tank bottom can be provided a conveyor by which the suctioned material separated from the air flow can be removed continuously or at intervals from the storage tank.
An excavator for removing material by suction, the excavator comprising a pneumatic trunk for removing suctioned material, a storage tank for separating the suctioned material supplied thereto by said trunk, an exhaust fan connected to the storage tank, and a filter positioned between an opening of the trunk into the storage tank and the exhaust fan, wherein the filter means comprises a coarse filter and a fine filter connected thereto, said coarse filter being formed by a labyrinth or cascade flow channel, which is bounded by reciprocally displaced partitions, and wherein a flow cross-section of the coarse filter increases in a suction flow direction through the excavator.
Dependencies are inferred from the claim text.