Fuel pump
US6715986B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2250/503
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pump for discharging a desired amount of fuel during vapor generation has a pump cover and a pump casing which rotatably accommodates an impeller. A pressure difference is caused in the vicinity of each impeller vane groove by fluid friction as the impeller rotates. Such a pressure difference repeatedly occurs with respect to each of the vane grooves, causing the pressurization of fuel in a pump channel formed along an outer periphery of the impeller to pump fuel to a motor chamber. An introduction groove of the pump channel formed on the pump cover side has a first vapor chamber outwardly extending in the radial direction of the impeller. Another pump channel introduction groove formed on the pump casing side has a second vapor chamber above the impeller. The first and second vapor chambers permit the removal of vapor in fuel fed from the fuel suction port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.