Fuel pumping apparatus
US4598685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Jul 10, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87837
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a valve means operable to control the spillage of fuel from a high pressure pump. The valve means includes first and second valve elements connected by a pivotal beam carried on a pivot movable in the direction of valve closure when an actuator is energized. The first valve element is biased by a spring to the open position and through the beam the second valve element is held in the closed position by the pressure developed by the pump and the second valve element is urged to the open position by the pressure but can be held closed against the pressure by the actuator. When the actuator is de-energized the second valve element is urged open by the pressure to lower the pressure and the spring then opens the first valve element and closes the second valve element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.