Liquid purification or separation – Comminuting
Patent
1988-09-26
1989-10-10
Fisher, Richard V.
Liquid purification or separation
Comminuting
37 70, 371175, 209421, B07B 100, E02F 340
Patent
active
048729779
ABSTRACT:
A solid waste retrieval device utilizes a rotating drum carrying a plurality of teeth to lift dried sludge from an underlying sand bed such that substantially no sand is removed with the sludge. The device moves over the sludge and compresses it beneath a forward rolled radius section to prevent buckling and disruption of the sludge ahead of the device.
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patent: 2631834 (1953-03-01), Butzow
patent: 3142341 (1964-07-01), Biasi
patent: 3461968 (1969-08-01), Longley
patent: 3473185 (1969-10-01), Bahr
patent: 3614837 (1971-10-01), Aroka
patent: 3783537 (1974-01-01), Penote et al.
patent: 4257178 (1981-03-01), Spradlin
patent: 4698150 (1987-10-01), Wigoda
Drodge Joseph
Fisher Richard V.
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