Multistage compressor system with intercooler
US-12163518-B2 · Dec 10, 2024 · US
Vane pump
US2016333876A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016333876-A1 |
| Application number | US-201515111188-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 19, 2015 |
| Priority date | Jan 27, 2014 |
| Publication date | Nov 17, 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 vane pump used as a fluid pressure source includes: a rotor that is rotationally driven; a plurality of vanes that are inserted into the rotor in a freely slidable manner; a cam ring at which tip-end portions of the vanes slides as the rotor rotates; a pump chamber that is defined between the adjacent vanes; a suction port that guides working fluid to the pump chamber; a discharge port through which the working fluid discharged from the pump chamber is guided; a groove-like notch that extends from an opening edge of the discharge port in an opposite direction from rotation direction of the rotor, and the notch has a gradient-changing portion at which a rate of change of opening area is decreased in the rotation direction of the rotor.
First claim
Opening claim text (preview).
1 . A vane pump used as a fluid pressure source comprising: a rotor that is rotationally driven; a plurality of vanes that are inserted into the rotor in a freely slidable manner; a cam ring at which tip-end portions of the vanes slides as the rotor rotates; a pump chamber that is defined between the adjacent vanes; a suction port that guides working fluid to the pump chamber; a discharge port through which the working fluid discharged from the pump chamber is guided; and a groove-like notch that extends from an opening edge of the discharge port in an opposite direction from rotation direction of the rotor, wherein the notch has a gradient-changing portion at which a rate of change of opening area is decreased in the rotation direction of the rotor, and the opening area of the notch is increased in one step in the rotation direction of the rotor at the gradient-changing portion. 2 . The vane pump according to claim 1 , wherein the notch has: an upstream groove portion at which the opening area is gradually increased from the distal-end portion in the rotation direction of the rotor; and a downstream groove portion at which the opening area remains unchanged from the upstream groove portion in the rotation direction of the rotor. 3 . The vane pump according to claim 1 , wherein the notch has: an upstream groove portion at which the opening area is gradually increased from the distal-end portion in the rotation direction of the rotor; and a downstream groove portion at which the opening area is gradually decreased from the upstream groove portion in the rotation direction of the rotor. 4 . The vane pump according to claim 1 , wherein the notch has a restrictor portion provided at the discharge port such that the opening area is locally decreased. 5 . (canceled)
Assignees
Inventors
Classifications
the inner and outer member being in contact along more than one line or surface · CPC title
of the outlet · CPC title
Oil · CPC title
- F04C15/06Primary
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title
of the stator · CPC title
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Frequently asked questions
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- What does patent US2016333876A1 cover?
- A vane pump used as a fluid pressure source includes: a rotor that is rotationally driven; a plurality of vanes that are inserted into the rotor in a freely slidable manner; a cam ring at which tip-end portions of the vanes slides as the rotor rotates; a pump chamber that is defined between the adjacent vanes; a suction port that guides working fluid to the pump chamber; a discharge port throug…
- Who is the assignee on this patent?
- Kyb Corp
- What technology area does this patent fall under?
- Primary CPC classification F04C15/06. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Nov 17 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).