Fuel pump having pulsation dampening branch flow paths
US-9835159-B2 · Dec 5, 2017 · US
Fuel pump
US2016369818A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016369818-A1 |
| Application number | US-201615185142-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 17, 2016 |
| Priority date | Jun 17, 2015 |
| Publication date | Dec 22, 2016 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A fuel pump includes a cylindrical stator having a plurality of windings, a rotor rotatably disposed radially inward of the stator, a shaft integrally rotatable with the rotor, an impeller including a fitting hole to which an end portion of the shaft is fitted, and a balance weight disposed in the impeller. The balance weight is formed so as to be symmetrical about a point of symmetry lying on an axial center of the impeller.
First claim
Opening claim text (preview).
1 . A fuel pump, comprising: a pump case including an inlet port that sucks in fuel and a discharge port that discharges the fuel; a cylindrical stator including a plurality of windings, the stator being fixed inside the pump case; a rotor rotatably disposed radially inward of the stator; a shaft disposed coaxially with the rotor, the shaft integrally rotating with the rotor; an impeller including a fitting hole in which an end portion of the shaft is fitted, the impeller being configured to pressurize the fuel sucked in from the inlet port and discharge the fuel from the discharge port when the shaft rotates; and a balance weight disposed in the impeller, the balance weight being formed so as to be symmetrical about a point of symmetry lying on a center axis of the impeller 2 . The fuel pump of claim 1 , wherein the balance weight is formed as an annular integral member. 3 . The fuel pump of claim 1 , wherein the balance weight is plurally disposed. 4 . The fuel pump of claim 3 , wherein the plurality of balance weights are disposed along a circumferential direction of the impeller. 5 . The fuel pump of claim 1 , wherein the balance weight is formed of a material having a different specific gravity than a material forming the impeller. 6 . The fuel pump of claim 5 , wherein the balance weight is formed of a material having a greater specific gravity than the material forming the impeller.
Assignees
Inventors
Classifications
especially adapted for liquid pumps · CPC title
especially adapted for liquid pumps · CPC title
Rotors · CPC title
electrically driven · CPC title
- F04D29/669Primary
especially adapted for liquid pumps (F04D29/18 takes precedence) · CPC title
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- What does patent US2016369818A1 cover?
- A fuel pump includes a cylindrical stator having a plurality of windings, a rotor rotatably disposed radially inward of the stator, a shaft integrally rotatable with the rotor, an impeller including a fitting hole to which an end portion of the shaft is fitted, and a balance weight disposed in the impeller. The balance weight is formed so as to be symmetrical about a point of symmetry lying on …
- Who is the assignee on this patent?
- Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification F04D29/669. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Dec 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).