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US 4,676,654 AGranted
Agitator device
AssigneeBattenfeld Maschinenfabriken GmbH
InventorHeinz J. Fleckner
Life of this patent
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AssigneeBattenfeld Maschinenfabriken GmbH
InventorHeinz J. Fleckner
Estimating the term…
An agitator device for charging gas into PUR-components and for the homogenization of the PUR-components and the gas for the production of a foam material includes a pressure vessel for containing the mixture of components and gas with a stirring device extending into the body of the mixture. The stirring device includes a shaft which can be driven in opposite directions. First and second stirring elements are located on the shaft. In one direction of rotation only the first stirring elements operate to charge gas into the PUR-components and when the shaft is driven in the other direction both the first and second stirring elements operate to homogenize the mixture. In one arrangement, due to the direction of rotation, the second stirring elements can be pivotally displaced between a stirring position and an inactive position. In another arrangement the second stirring elements can be selectively connected to the shaft by a clutch so that the clutch engages the stirring elements for rotation in only one rotational direction of the shaft.
Agitator device for charging gas into and for the homogenization of flowable PUR-components and the gas for the production of a foamed plastics material, comprising a pressure vessel arranged to contain the PUR-components in fluid form so that a fluid level is formed in said pressure vessel, a rotationally driven hollow stirrer located within said pressure vessel including first and second stirring elements located below the fluid level, means in combination with said stirrer for supplying a gas into the PUR-component below the fluid level, wherein the improvement comprises that said hollow stirrer comprises a reversible rotational drive, an axially extending shaft connected to said rotational drive for rotation of said shaft in the clockwise and counterclockwise directions about said shaft axis, said first stirring elements connected to said shaft for rotation in the clockwise and counterclockwise directions and having a circle of rotation, said second stirring elements extending radially outwardly from the circle of rotation of said first stirring elements, means for mounting said second stirring elements so that in one of the oppositely directed rotational movements of said shaft said second stirring elements do not provide any stirring action and in the other of the oppositely directed movements of said shaft said second stirring elements provide a stirring action.
Dependencies are inferred from the claim text.