Waste water pump
AssigneeGrundfos Holding A/S
InventorPoul Johannes HENNING
Life of this patent
Estimating the term…
Abstract
A waste water pump includes an impeller (12) and a surrounding pump housing (4), wherein an impeller side chamber (20) is formed between the impeller (12) and the pump housing (4). The impeller side chamber (20) has a first seal (16) between the impeller (12) and the pump housing (4), towards the intake side (32) of the impeller (12), and a second seal (18) between the impeller (12) and the pump housing (4), towards the pressure side (14) of the impeller (12). The first seal (16) is provided with a conveying device (28, 30) configured to convey debris from the impeller side chamber (20) to the intake side (32) of the impeller (12). The second seal (18) is provided with conveying device (38, 40) configured to convey debris from the side chamber (20) to the pressure side (14) of the impeller (12).
Claims15
A waste water pump comprising:
- an impeller;
- a pump housing surrounding the impeller, wherein an impeller side chamber is formed between the impeller and the pump housing;
- a first seal, said impeller side chamber having the first seal between the impeller and the pump housing towards an intake side of the impeller;
- and
- a second seal, said impeller side chamber having the second seal between the impeller and the pump housing towards a pressure side of the impeller, wherein the first seal is provided with a first seal conveying means configured to convey debris from the impeller side chamber to the intake side of the impeller and the second seal is provided with a second seal conveying means configured to convey debris from the side chamber to the pressure side of the impeller.
Dependencies are inferred from the claim text.