Gear pump or motor
US7150612B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2004 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jan 14, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gear•rear shaft containing main body of a bottomed type is penetrated with a bearing hole and a rear face of the gear•rear shaft containing main body is coupled with a closing plate to form an airtight seal from an outside environment. Shafts extended from two gears to a side of the rear face are set to be shorter than a length of the bearing hole in an axis core direction. Bushes are also set to a length that is the same as that of the shafts. The gear•rear shaft containing main body is formed with a recess portion at the rear face and the bearing hole is penetrated to open to the recess portion. The gear•rear shaft containing main body is bored to penetrate with a low pressure port communicating with a low pressure region in an axis core direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.