Pump device
US-2018180043-A1 · Jun 28, 2018 · US
Two stage pump, particularly provided as main pump for supplying an aircraft engine with fuel
US9752575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9752575-B2 |
| Application number | US-201514750121-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2015 |
| Priority date | Jun 26, 2014 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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Abstract
Official abstract text for this publication.
A two stage pump ( 2′, 4′ ), where the high pressure stage ( 4 ′) is a gear pump ( 11, 12 ), comprises a driving of the other stage ( 2 ′) by a support shaft ( 74 ), mounted in the driven pinion ( 12 ), the shaft ( 74 ) being driven by the drive shaft ( 21 ), by means of a pair of toothed wheels ( 77, 79 ) adjacent to the rest of the stage ( 4 ′), which can allow different rotation speeds between the two stages ( 2′, 4′ ). The support shaft ( 74 ) may be supported by stops and hydrodynamic bearings, directly integrated and lubricated in the driven pinion, which make the design lighter and more compact. The shaft ( 74 ) and the toothed wheels ( 77, 79 ) ingeniously transmit the loads from the stage ( 2 ′) to the stage ( 4 ′) in such a way as to cancel out the usual hydraulic loads, stemming from pressure, and mechanical, forces stemming from rotational drivings on the driven pinion ( 12 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. Two stage pump including a first pump having a rotating pumping element driven by a support shaft, a second pump including two pumping pinions meshing together, the two pumping pinions including a driving pinion and a driven pinion, a drive shaft of the driving pinion extending along a longitudinal axis, and a transmission connecting the driving pinion to the support shaft, the transmission being contained in the second pump, the support shaft being coa…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F04C11/005Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9752575B2 cover?
- A two stage pump ( 2′, 4′ ), where the high pressure stage ( 4 ′) is a gear pump ( 11, 12 ), comprises a driving of the other stage ( 2 ′) by a support shaft ( 74 ), mounted in the driven pinion ( 12 ), the shaft ( 74 ) being driven by the drive shaft ( 21 ), by means of a pair of toothed wheels ( 77, 79 ) adjacent to the rest of the stage ( 4 ′), which can allow different rotation speeds betwe…
- Who is the assignee on this patent?
- Snecma
- What technology area does this patent fall under?
- Primary CPC classification F04C11/005. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Sep 05 2017 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).