Pump device
AssigneeMikuni Corporation
InventorYasuhiro INO
Life of this patent
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Abstract
The pump device includes a housing defining insertion holes for a rotation shaft, inlets and outlets, and an internal passage; a first pump element; and a second pump element. The internal passage includes first suction passages communicating from the inlet to a first suction port facing the first end surface of the first pump element directed to one end side; first discharge passages communicating from a first discharge port facing the first end surface to the outlet; second suction passages passing around the first pump element to communicate from the inlet to a second suction port facing the second end surface of the second pump element; and second discharge passages passing around the first pump element to communicate from a second discharge port facing the second end surface to the outlet.
Claims13
A pump device, comprising:
- a housing defining an insertion hole through which a rotation shaft that rotates around a predetermined axis is inserted, an inlet and an outlet for a fluid which open on one end side in an axial direction of the axis, and an internal passage through which the fluid passes;
- and
- a first pump element arranged near the one end side and a second pump element disposed adjacent to the first pump element so as to be rotationally driven by the rotation shaft within the housing,
- wherein the internal passage comprises a first suction passage communicating from the inlet to a first suction port facing a first end surface of the first pump element directed to the one end side, a first discharge passage communicating from a first discharge port facing the first end surface to the outlet, a second suction passage passing around the first pump element to communicate from the inlet to a second suction port facing a second end surface of the second pump element, and a second discharge passage passing around the first pump element to communicate from a second discharge port facing the second end surface to the outlet.
Dependencies are inferred from the claim text.