Flexible pump assembly for use in a fan drive
US12398802B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2024 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Nov 4, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/4008
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump assembly has a displacement volume that is continuously adjustable by a double-acting control cylinder having first and second control chambers, to which first and second receiving bores, respectively, are assigned. A pressure control valve in the form of a built-in valve is installed in one of the receiving bores and a 3/2-way switching valve in the form of a built-in valve is installed in the other of the receiving bores. The pressure control valve and the 3/2-way switching valve are each electrically adjustable and are connected to a control device. A target conveying pressure difference can be specified to the control device, and the control device is configured such that, by controlling the pressure control valve and the 3/2-way switching valve, the control device adjusts the displacement volume so that the difference between the first and second actual pressures approaches the target conveying pressure difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.