Electromagnetic fuel delivery and metering pump

Pumps – Successive stages – With interstage discharge or additional discharge from...

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417253, 417418, F04B 300, F04B 1704

Patent

active

043091539

ABSTRACT:
An electromagnetic fuel delivery pump is formed by a combination of a diaphragm pump and a metering pump. Each of the pumps have working chambers and flow control valves are arranged to enable interconnection of the working chambers when the diaphragm pump executes a delivery stroke and the metering piston pump executes a suction stroke. In a preferred embodiment, a diaphragm of the diaphragm pump is disposed directly on an extension of a piston of the metering piston pump, which piston is connected with an armature of an electromagnet that produces the delivery stroke of the piston metering pump and the suction stroke of the diaphragm pump. The delivery stroke of the diaphragm pump and the suction stroke of the piston metering pump are executed under the influence of a common return spring.

REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 947613 (1910-01-01), Gathmann
patent: 2293684 (1942-08-01), Holthouse
patent: 2801591 (1957-08-01), Parker
patent: 2841085 (1958-07-01), Evans

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