Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Patent
1976-12-27
1979-02-27
Fisher, Richard V.
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
134 21, 134 22C, 134 24, 134167C, 1510406R, B08B 302, B08B 906
Patent
active
041417534
ABSTRACT:
Method and apparatus for the in situ, internal cleaning of a hollow, variable diameter, air and dirt evacuation duct which is coupled to a vacuum creating system. The apparatus comprises a fluid emitting member receivable in the duct for dislodging dirt and scale which might accumulate on the inside wall of the duct. Mechanism is provided for drawing the fluid emitting member through the duct including a line, coupled to the fluid emitting member, passing from the inlet to the outlet of the duct. An expansible and contractible member is received by the duct and is responsive to a differential pressure being created by the vacuum creating system to expand outwardly into intimate engagement with the internal wall of the duct and to move in a downstream direction whereby the line and fluid emitting member are moved through the duct.
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patent: 1999559 (1935-04-01), Brendlin
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patent: 3874926 (1975-04-01), Horne et al.
patent: 3885286 (1975-05-01), Hill
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