Patent ID: 11879476
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A closed impeller comprising:
an impeller body including a plurality of blade portions; and
a shroud fitted on the impeller body,
the shroud being press formed into a curved shape along end portions of the blade portions,
the shroud including a plurality of protrusions protruding from a surface facing the impeller body and extending, and curved, along the end portions of the plurality of blade portions,
an amount of protrusion of each of the protrusions being less than a thickness of the shroud, and
a brazing material being provided at least between end portions of the protrusions and the blade portions of the impeller body,
the end portions of the protrusions being formed into a shape corresponding to the end portions of the blade portions so that a width of the end portion of each of the protrusions is adjusted to a width of the end portion of an associated one of the blade portions.