| 摘要 |
A fluid pump having a chamber, a diaphragm cooperating with the chamber and actuated by a solenoid, and inlet and outlet check valves communicating with the chamber. Another valve communicating with the chamber and interposed in the flow path of fluid through the pump between the check valves prevents the flow of fluid from the chamber to the exterior of the pump when the diaphragm is not operating while permitting fluid to be admitted to the chamber on an intake stroke of the diaphragm and to be displaced from the chamber on a discharge stroke of the diaphragm when the diaphragm is operating. An adjustable stop permits the length of the intake and discharge strokes of the diaphragm to be adjusted so that the volume of fluid displaced from the pump per each cycle of the diaphragm may be varied and adjusted within predetermined limits. |
