Fuel pump
US3936243A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Jun 24, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D13/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pump, comprises an electric motor mounted in a tubular housing which is formed with a tapered portion at the take-in side, and an impeller which is mounted adjacent the tapered portion of the housing on the armature shaft of the motor for rotation therewith. A disc-shaped wall concentrical of the armature shaft separates the impeller from the motor space and is formed, at its circumference, with a channel-shaped annular duct open toward the periphery of the impeller. The radially extending impeller blades are thereby enclosed between the tapered portion of the housing and the disc-shaped wall, and the fuel is guided radially into the annular duct. The inside cross-section of the duct is appropriately increasing along the circumference so that the fuel speed is reduced with minimum losses of energy and passes through apertures in the annular duct to the inside periphery of the motor space to which it is urged due to centrifugal forces and along which it is guided by longitudinal ribs prior to passing to the outlet. To improve the efficiency of the impeller, the blades are covered by an annular wall at the side remote from the tapered portion of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.