Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1988-06-10
1990-01-23
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
B08B 902
Patent
active
048951781
ABSTRACT:
An apparatus for use in delivering fluid under pressure to a drain of a given diameter includes a bladder having an inlet end, an outlet end and an expandable wall having an outer diameter which is smaller than the given diameter of the drain when the bladder is unexpanded. The apparatus includes an orifice at the outlet end of the bladder and may be connected at its inlet to a fluid supply source which supplies fluid under pressure to the bladder. The diameter of the orifice is sized relative to the diameter of the inlet to cause a pressure build-up in the bladder sufficient to cause the expansion of the bladder when fluid is supplied to the bladder, and an inner member is provided for directing fluid flow radially outwardly within the bladder toward the expandable wall to facilitate the expansion of the bladder. The apparatus may alternatively be provided with valve means for covering the orifice when the wall is unexpanded and for uncovering the orifice as the wall is expanded.
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AGF Manufacturing, Inc.
Coe Philip R.
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