Pumps – Diverse pumps – Priming with liquid level responsive control
Patent
1975-10-20
1977-06-14
Freeh, William L.
Pumps
Diverse pumps
Priming with liquid level responsive control
418 97, F04D 900, F01C 2104
Patent
active
040294382
ABSTRACT:
A well point pumping system which includes a series of well points installed in an area of the ground which is to be dewatered or dried out for example, before an excavation process. The well point system includes an engine driven impeller type pump usually located above the water line and which provides high lift, i.e., vacuum for the system. The pump is of a low specific speed and capable of a high vacuum (lift) and has a large impeller which operates at an efficient point in its characteristic curve and which functions to efficiently draw against a high content of air in the pumping system and in doing so operates at an efficient manner from a fuel consumption standpoint. The system also includes a vacuum pump which efficiently acts to aid in priming the system before the impeller pump takes over the task of the pumping operation. A peller valve operated float tank is used in conjunction with the vacuum pump to prime the system before the impeller pump comes into play for the main pumping operation.
REFERENCES:
patent: 2428373 (1947-10-01), Lloyd
patent: 2535583 (1950-12-01), Kroll
patent: 2784674 (1957-03-01), Carver et al.
patent: 3306314 (1967-02-01), Judsen
patent: 3860364 (1975-01-01), Aronson
patent: 3867070 (1975-02-01), Sloan
patent: 3904319 (1975-09-01), Parish et al.
patent: 3910728 (1975-10-01), Sloan
Freeh William L.
Nilles James E.
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