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US 10,895,267 B2Granted
Finger pump
AssigneeKSB Aktiengesellschaft
InventorsNicolas Petit, Stéphanie Gonzalez, Mateusz Kaminski, Christoph Jager
Life of this patent
Estimating the term…
Abstract
In this pump, the angle between the imaginary tangent plane to the lip and passing through the axis and an imaginary straight line, perpendicular to the axis and passing through the point furthest from the axis of intersection of the upper surface of a finger with the lateral leading surface of this finger, is between 110 and 140°.
Claims14
A pump comprising:
- an impeller rotating around a vertical axis and having at least one blade,
- a fixed volute having a lip and surrounding the impeller,
- a finger fixed to the fixed volute just downstream of an input of a crossing groove machined in an inner wall of the fixed volute, projecting below the blade in the direction of the axis and having an upper surface, of which at least a part is at a distance from the blade of 0.05 to 1 mm, and a lateral leading surface,
- an angle between an imaginary plane tangent to the lip and passing through the axis and an imaginary straight line, perpendicular to the axis and passing through a point furthest from the axis of an intersection of the upper surface of the finger with the lateral leading surface, is between 110° and 140°.
1 more element
A pump comprising:
- an impeller rotating around a vertical axis and having at least one blade,
- a fixed volute surrounding the impeller,
- a finger fixed to the fixed volute just downstream of an input of a crossing groove machined in an inner wall of the fixed volute, projecting below the blade in a direction of the axis and having an upper surface, at least part of which is at a distance from the blade of 0.05 to 1 mm, and a lateral leading surface, characterised in that an angle between the tangent to the downstream edge of the input of the crossing groove machined in the inner wall of the fixed volute and an edge between the upper surface and the lateral leading surface is between 18° and 150°.
Dependencies are inferred from the claim text.