Conveying apparatus using unstable electric power supply

Details Conveying apparatus using unstable electric power supply Conveying apparatus using unstable electric power supply

1997-04-09

2000-04-18

Freay, Charles G.

Pumps

Condition responsive control of pump drive motor

With condition responsive control of pump fluid valve

417 36, 417302, 417411, F04B 4900, F04B 3504

Patent

active

060507799

ABSTRACT:
A conveying system comprising a pump whose power source is an unstable electric power supply, such as a solar cell; a first supply pipe for conveying liquid from an intake to the pump; a second supply pipe for conveying the liquid from the pump to a discharge opening; a liquid storage tank provided at a position which is below the discharge opening and above the pump; a third supply pipe branching from the second supply pipe, for conveying the liquid to the liquid storage tank; a fourth supply pipe connected between the liquid storage tank and the first supply pipe; a first valve, provided between the branching point of the first and fourth supply pipes and the intake, for opening and closing the first supply pipe; a second valve, provided between the branching point of the second and third supply pipes and the discharge opening, for opening and closing the second supply pipe; a third valve for opening and closing the third supply pipe; and a fourth valve for opening and closing the fourth supply pipe. The conveying system is capable of conveying liquid, fine powder, and so on, at high efficiency with a single pump even when available electric power supplied from the unstable electric power supply is low by performing open/close control of the second and fourth valves.

REFERENCES:
patent: 4370098 (1983-01-01), McClain et al.
patent: 4744334 (1988-05-01), McAnally
patent: 4802829 (1989-02-01), Miller

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