Fluid handling – Siphons – With flow starting – stopping or maintaining means
Patent
1980-01-07
1981-11-24
Michalsky, Gerald A.
Fluid handling
Siphons
With flow starting, stopping or maintaining means
137151, 137854, 447555R, F04F 1000
Patent
active
043018262
ABSTRACT:
A combination vacuum lift pump and siphon for handling liquids, comprising a pump cylinder having an inlet disposed near one end and an outlet adjacent to but spaced from the other end, a piston reciprocatable in the cylinder, and a plunger and handle connected therewith, and a pair of check valves, one of which is associated with the piston and is operable to be closed when the plunger is lifted in the cylinder, and the other of which is disposed at the cylinder inlet and is operable to be closed when the plunger is lowered in the cylinder. The outlet of the cylinder is spaced a short distance from the upper end thereof, such that for siphon operation the piston and its check valve can be moved to a position in the cylinder which is beyond the location of the outlet. Accordingly, the flow of liquid by-passes the piston check valve completely, and the latter thus does not act in such a manner as to restrict the siphon flow, as was the case in many other constructions. In addition, the present device can operate, without modification, as either a siphon, or a complete positive-action hand pump in the event that gravity-type siphoning is not possible.
REFERENCES:
patent: 104641 (1870-06-01), Pitman
patent: 755941 (1904-03-01), Roberts
patent: 1804270 (1931-05-01), Palich
patent: 2576637 (1951-11-01), Patriquin
patent: 2854017 (1958-09-01), Jordan et al.
patent: 3006282 (1961-10-01), Sisson
patent: 3124080 (1964-03-01), Sisson
patent: 3669575 (1972-06-01), Beckerer
patent: 4257445 (1981-03-01), Cook et al.
Lehmann H. Gibner
Lehmann K. Gibner
Michalsky Gerald A.
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