| 摘要 |
Disclosed herein is a combined oil pumping and fuel supplying device comprising a housing including a variable volume discharge chamber which is adapted for fluid communication with a point of use and which varies in volume between a greater volume and a lesser volume, an inlet chamber which is adapted to communicate with a source of fuel under pressure and which varies in volume between a larger volume and a smaller volume, a valve communicating between the discharge chamber and the inlet chamber and operable between open and closed positions, structure for displacing the valve to the open position in response to contraction of the discharge chamber to the lesser volume, structure for displacing the valve to the closed position in response to contraction of the inlet chamber to the smaller volume, and a plunger responsive to variation in volume of one of the chambers toward one of the greater and lesser volumes for pumping oil for supply to a point of use. |
