Positive displacement pump having multiple operating stages
US10451060B2 · kind B2 · utility
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4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H57/0436
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive displacement pump for pumping oil in a motor vehicle transmission comprises a pump stage that has a central kidney-shaped suction cavity and two kidney-shaped pressure cavities. Oil is selectively pumped via one kidney-shaped pressure cavity or the other kidney-shaped pressure cavity in accordance with the direction of rotation of the pump stage. This makes it possible to create, with little complexity, two operating stages for the positive displacement pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.