Fuel pump
US5709197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1996 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Aug 21, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Fuel is pressurized by the expansion and contraction of a pump chamber defined inside a casing according to the rotation of a power input shaft which penetrates from the outside of the casing into its inside. A first seal member is provided between the casing and the power input shaft and prevents escape of fuel which is inside the casing, and a second seal member is provided in series therewith. Further, leakage of fuel to the outside of the casing from the second seal member is prevented by the provision of a drain conduit which drains fuel which has leaked into a space defined between the first seal member and the second seal member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.