Suction excavator

Details Suction excavator Suction excavator

1994-02-25

1995-06-20

Reese, Randolph A.

Excavating

Beneath a body of water

Suction

175 66, 175206, 299 17, 405248, 405249, 37315, 37905, E02F 388, E02F 392, E02F 1390, E02F 128

Patent

active

054251885

ABSTRACT:
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.

REFERENCES:
patent: 2774569 (1956-12-01), Jacobsen
patent: 3612193 (1971-10-01), Hirata
patent: 3842461 (1974-10-01), Wurster
patent: 3930324 (1976-01-01), Wightman et al.
patent: 5016717 (1991-05-01), Simons et al.

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