Fuel pump
US4013053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | May 2, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D13/0653
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electric-motor-powered centrifugal fuel pump including a vacuum control device to achieve the initial priming of the centrifugal pump. The electric motor which drives a centrifugal impeller is housed within the pump itself and, as such, is immersed in the fuel being pumped. An associated filter bowl incorporates a float valve, thus becoming a filter and float bowl which controls the vacuum so that when the fuel level reaches a predetermined point, the float valve rises and engages its valve seat, thus shutting off the vacuum source. A secondary ball valve is also provided in the vacuum line so that, in the event of the vehicle's overturning, this ball valve will close the vacuum line and prevent gravitational fuel flow to the vacuum source. When the vacuum draws sufficient fuel into the centrifugal pump cavity, the centrifugal impeller is then capable of discharging this fuel under pressure through the filter to an outlet port that is connected to the carburetor. Furthermore, once the centrifugal impeller is so primed, it will sustain the prime. A check valve is provided in the fuel suction line to prevent gravitational draining of the pump during shutdown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.