Electrically operated fuel pump device having a regenerative component
US4451213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Mar 29, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/048
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electrically operated fuel pump device comprises a regenerative pump component and an electric motor component operatively connected to the regenerative pump component to actuate the same. The regenerative pump component includes a pump casing having spaced inner surfaces thereof cooperating with each other to define therebetween a pump chamber. An impeller is disposed within the pump chamber rotatably and axially movably. Clearances are defined between axial end faces of the impeller and the inner surfaces of the pump casing, respectively. Liquid fuel increased in pressure to a discharge pressure by the rotation of the impeller is introduced into the clearances to act on the axial end faces of the impeller so as to minimize the direct contact of the axial end faces of the impeller with the respective inner surfaces of the pump casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.