Importance

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Abstract

A fluid driven tank cleaning device is provided. The device includes an inlet that connects to a source of cleaning solution under pressure and a stem coupled to the inlet having a fluid receiving chamber. A hermetically sealed gear box is also provided which is coupled to the stem and has a secondary chamber separated from the receiving chamber by a common wall. A primary drive shaft rotatably mounted within the fluid receiving chamber is driven by an impeller which rotates in response to fluid entering the fluid receiving chamber. The primary drive shaft is magnetically coupled to a secondary drive shaft rotatably mounted within the secondary chamber. A gear train reduces the speed of the secondary shaft. A first output shaft rotatably mounted within the secondary chamber is connected to the secondary drive shaft via the gear train. The output shaft is magnetically coupled to a second output shaft which rotates a main housing relative to the stem about a first axis. A fluid nozzle assembly rotatably mounted to the main housing about a second axis is also provided. The fluid nozzle assembly is fluidly connected to the fluid receiving chamber and discharges the cleaning solution out of the tank cleaning device in a high speed spray. The inlet, the stem, the hermetically sealed gear box, the main housing and the fluid nozzle assembly are all formed of an aliphate polyketone.

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First Claim