Torque control oil pump with low parasitic loss and rapid pressure transient response
US6672850B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/101
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A torque control crescent oil pump, having low parasitic loss and rapid pressure transient response, and a method for controlling oil flow within the pump, are provided. In one embodiment, the crescent oil pump comprises a housing, toothed annular gears cooperatively rotating about preferably offset first and second axes, and a crescent body. The crescent body is adapted to move from a first position to a second position. In the first position, the crescent body is adapted to form a seal between the annular gears. In the second position, the crescent body is positioned so that it does not form a seal between the annular gears. In another embodiment, an actuating device moves the crescent body from the first position to the second position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.