Pressure compensated external gear machine
US-2020088285-A1 · Mar 19, 2020 · US
Gear pump with gear including etched surfaces
US11624360B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11624360-B2 |
| Application number | US-202017132534-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 23, 2020 |
| Priority date | Dec 23, 2020 |
| Publication date | Apr 11, 2023 |
| Grant date | Apr 11, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A gear for a pump includes a gear body defining a root circle, and a plurality of gear teeth extending from the gear body radially outwardly of the root circle. Each of the plurality of gear teeth have a tip portion, a leading edge, a trailing edge, a circular thickness defined between the leading edge and the trailing edge, a first radially outwardly facing surface and a second radially outwardly facing surface. At least one of the first radially outwardly facing surface and the second radially outwardly facing surface includes a chamfered portion that extends from the leading edge toward the trailing edge across a portion of the circular thickness.
First claim
Opening claim text (preview).
What is claimed is: 1. A gear for a pump comprising: a gear body defining a root circle; and a plurality of gear teeth extending from the gear body radially outwardly of the root circle, each of the plurality of gear teeth having a tip portion, a leading edge, a trailing edge, a circular thickness defined between the leading edge and the trailing edge, and a radially outwardly facing surface, the radially outwardly facing surface including a chamfered portion that extends from only one of the leading edge and the trailing edge toward the other of the leading edge and the trailing edge across a portion of the circular thickness, wherein the chamfered portion extends from the root circle to the tip portion of each of the plurality of gear teeth. 2. The gear according to claim 1 , wherein the portion comprises at least 15% of the circular thickness. 3. The gear according to claim 2 , wherein the portion comprises at least 40% of the circular thickness. 4. The gear according to claim 3 , wherein the portion comprises at least 43% of the circular thickness. 5. The gear according to claim 1 , wherein the chamfered portion is formed on each radially outwardly facing surface of the plurality of gear teeth. 6. The gear according to claim 1 , wherein the chamfered portion includes a height of at least about 2 light bands. 7. The gear according to claim 6 , wherein the height of the chamfered portion is about 3 light bands. 8. A fuel pump comprising: a housing including an interior, an inlet, and an outlet; a stationary bearing mounted in the interior; a pressure loaded bearing positioned in the interior opposite the stationary bearing; and a gear rotatably supported between the pressure loaded bearing and the stationary bearing, the gear comprising: a gear body having a root circle; and a plurality of gear teeth extending from the gear body radially outwardly of the root circle, each of the plurality of gear teeth having a tip portion, a leading edge, a trailing edge, a circular thickness defined between the leading edge and the trailing edge, and a radially outwardly facing surface, the radially outwardly facing surface including a chamfered portion that extends from only one the leading edge and the trailing edge toward the other of the leading edge and the trailing edge across a portion of the circular thickness, wherein the chamfered portion extends from the root circle to the tip portion of each of the plurality of gear teeth. 9. The fuel pump according to claim 8 , wherein the portion comprises about 15% of the circular thickness. 10. The fuel pump according to claim 9 , wherein the portion comprises at least 40% of the circular thickness. 11. The fuel pump according to claim 10 , wherein the portion comprises at least 43% of the circular thickness. 12. The fuel pump according to claim 8 , wherein the chamfered portion is formed on each radially outwardly facing surface of the plurality of gear teeth. 13. The fuel pump according to claim 8 , wherein the chamfered portion includes a height of at least about 2 light bands. 14. The fuel pump according to claim 13 , wherein the height of the chamfered portion is about 3 light bands.
Assignees
Inventors
Classifications
- F04C2/084Primary
Toothed wheels · CPC title
Fuel · CPC title
Casings or housings · CPC title
with similar tooth forms (F04C2/16 takes precedence) · CPC title
Fuel · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11624360B2 cover?
- A gear for a pump includes a gear body defining a root circle, and a plurality of gear teeth extending from the gear body radially outwardly of the root circle. Each of the plurality of gear teeth have a tip portion, a leading edge, a trailing edge, a circular thickness defined between the leading edge and the trailing edge, a first radially outwardly facing surface and a second radially outwar…
- Who is the assignee on this patent?
- Hamilton Sundstrand Corp
- 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 Apr 11 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).