Impeller for water pump
AssigneesHonda Giken Kogyo Kabushiki Kaisha, Kabushiki Kaisha Yamada Seisakusho
InventorsToshiro Ijima, Ryouhei Adachi, Fei Song, Satoshi Maruyama
Life of this patent
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Abstract
An impeller for a water pump includes an impeller main body composed of a synthetic resin and having a vane member formed around a rotating center portion; and a metal boss in which a circular boss member positioned on the forward side of the rotating center portion and provided with a gradually narrowing portion at the axial end thereof, and a periaxial support boss member positioned on the rearward side of the rotating center portion are consecutively formed in the axial direction, and in which an axial support surface is formed between the circular boss member and periaxial support boss member, the metal boss being insert-fitted into said rotating center portion.
Claims21
An impeller for a water pump comprising:
- an impeller main body composed of a synthetic resin and having a vane member formed around a rotating center portion;
- and a metal boss in which a gradually narrowing portion positioned on the forward side of said rotating center portion, funned in a location on the axial end portion, and having a gradually decreasing axial diameter, a circular boss member whose entire outer peripheral surface is funned by said gradually narrowing portion and a cylindrical outer peripheral surface, and a periaxial support boss member positioned on the rearward side of the rotating center portion and provided with a detent on the outer periphery of the axial end portion thereof are formed consecutively in the axial direction, and in which an axial support surface is formed between said circular boss member and periaxial support boss member, said metal boss being insert-fitted into said rotating center portion.
An impeller for a water pump, said impeller comprising:
- an impeller main body having a vane member formed around a hollow central portion;
- and
- a hub insert fined into the hollow central portion of the impeller main body and having an inner axial hole, said insert including, in an axial direction thereof, a front portion and a rear portion contiguously extending rearwardly from said front portion to define a shoulder at a rear end face of said front portion;
- wherein
- an entire outer surface of said front portion defines a circle in any cross section taken perpendicular to the axial direction;
- and
- an outer diameter of said front portion decreases toward a front end face thereof.
Dependencies are inferred from the claim text.