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US-2024287987-A1 · Aug 29, 2024 · US
Rotor for oil pump with different contours for the drive-side versus non-drive side of the teeth
US9039397B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9039397-B2 |
| Application number | US-201313903877-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 28, 2013 |
| Priority date | Jun 1, 2012 |
| Publication date | May 26, 2015 |
| Grant date | May 26, 2015 |
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Abstract
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A rotor for an oil pump according to the present invention is a rotor that includes an inner rotor configured by teeth, each of which has a plurality of ellipses or circles, and an outer rotor that is disposed on the outside of the inner rotor and has one tooth more than the inner rotor, wherein, in a tooth of the inner rotor, a tooth top and a tooth root of a drive-side half-tooth region extending from the tooth top to the tooth root and a tooth top and a tooth root of a non-drive-side half-tooth region extending from the tooth top to the tooth root are each configured by a different ellipse or a circle. A circumferential axis along a circumferential direction of the ellipse or circle configuring the tooth top is longer in the non-drive-side half-tooth region than in the drive-side half-tooth region.
First claim
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What is claimed is: 1. A rotor for an oil pump, comprising: an inner rotor part having a plurality of inner rotor teeth, each of which has a plurality of ellipses or circles; and an outer rotor part that is disposed on an outside of the inner rotor part, the outer rotor part having a plurality of outer rotor teeth, and has one outer rotor tooth more than the inner rotor part, wherein, in an inner rotor tooth of the plurality of inner rotor teeth, a tooth top and a tooth root o…
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- What does patent US9039397B2 cover?
- A rotor for an oil pump according to the present invention is a rotor that includes an inner rotor configured by teeth, each of which has a plurality of ellipses or circles, and an outer rotor that is disposed on the outside of the inner rotor and has one tooth more than the inner rotor, wherein, in a tooth of the inner rotor, a tooth top and a tooth root of a drive-side half-tooth region exten…
- Who is the assignee on this patent?
- Yamada Mfg Co Ltd, Yamada Mfg Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F04C2/084. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 26 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).