Pumps – Motor driven – Fluid motor
Patent
1976-12-08
1978-08-29
Croyle, Carlton R.
Pumps
Motor driven
Fluid motor
417402, 91352, 92 132, F04B 4306, F04B 4500, F01L 3118
Patent
active
041100581
ABSTRACT:
A vacuum-operated liquid pump includes a pumping member and a housing defining a pump chamber in which the pumping member moves along suction inlet and pressure discharge strokes. The pumping member divides the pumping chamber into a liquid space on one side of the pumping member and a gas space on the other side of the pumping member. A liquid-supply communicates with the liquid space for responding to movement of the pumping member along its suction inlet stroke to deliver liquid to the liquid space. A liquid discharge also communicates with the liquid space for responding to movement of the pumping member along its pressure discharge stroke to discharge liquid out of the liquid space. A passage communicates with the gas space for placing the latter in communication with a source of vacuum, while a valve cooperates with this passage for alternately placing the latter in communication with the source of vacuum and in communication with the outer atmosphere. This valve is operatively connected with the pumping member to be operated thereby for placing the passage in communication with the source of vacuum when the pumping member reaches the end of its pressure discharge stroke and for placing the passage in communication with the outer atmosphere when the pumping member reaches the end of its suction inlet stroke.
REFERENCES:
patent: 1780336 (1930-11-01), Canton
patent: 2221071 (1940-11-01), Barfod
patent: 2242582 (1941-05-01), Jencick
patent: 2552261 (1951-05-01), Coughlin
patent: 2641107 (1953-06-01), Rappl
patent: 2713830 (1955-07-01), Harry et al.
patent: 2713854 (1955-07-01), Conover
patent: 2765809 (1956-10-01), Lamar
patent: 2948221 (1960-08-01), Carver
patent: 3377922 (1968-04-01), Spender et al.
Langie Miguel J.
Langle Juan P.
Croyle Carlton R.
Ross Thomas I.
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