Pump
AssigneeEbara Corporation
InventorsTakaaki ARAI, Masahito KAWAI, Rinoko OKUMURA
Life of this patent
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Abstract
A pump casing capable of preventing clogging of a pump caused by foreign matter is disclosed. The pump includes: an impeller; and a pump casing that houses the impeller therein. The pump casing has a cutter that faces a leading edge of the impeller. The cutter has a front-side surface that forms a front side of the cutter in a rotation direction of the impeller. An angle formed between the front-side surface of the cutter and the leading edge of the impeller as viewed from a direction of a rotation axis of the impeller gradually decreases with rotation of the impeller. A maximum value of the angle is less than 90 degrees.
Claims10
A pump comprising:
- an impeller;
- and
- a pump casing that houses the impeller therein,
- wherein the pump casing has a cutter that faces a leading edge of the impeller,
- the cutter has a front-side surface that forms a front side of the cutter in a rotation direction of the impeller,
- an angle formed between the front-side surface of the cutter and the leading edge of the impeller as viewed from a direction of a rotation axis of the impeller gradually decreases with rotation of the impeller, and
- a maximum value of the angle is less than 90 degrees.
Dependencies are inferred from the claim text.