Pumps – Motor driven – Fluid motor
Patent
1984-08-31
1985-06-04
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
406 50, 406 76, 406 96, 417900, B65G 5308, F04B 1502, F04B 4306
Patent
active
045211655
ABSTRACT:
Apparatus for pumping fluent solid material comprising first and second expansible chamber pumps and means interconnecting the pumps. The first expansible chamber pump has an inlet with a check valve for intake of material from a supply thereof on an intake stroke of the first pump and an outlet with a check valve for discharge of the material on a discharge stroke of the first pump. The apparatus also has a line for delivery of material from the outlet of the first pump. The second expansible chamber pump has an inlet with a check valve for intake of gas on an intake stroke of the second pump and an outlet with a check valve for discharge of gas on a discharge stroke of the second pump. Means interconnect the pumps for operation of the second pump through a discharge stroke on an intake stroke of the first pump and through an intake stroke on a discharge stroke of the first pump. A gas line interconnects the outlet of the second pump to the material delivery line downstream from and adjacent the outlet of the first pump whereby on each discharge stroke of the first pump the second pump takes in gas and on each intake stroke of the first pump the second pump pumps gas to the material delivery line behind the material delivered into the line through the outlet of the first pump on the preceding stroke of the first pump.
REFERENCES:
patent: 1489909 (1924-04-01), Webb
patent: 3070023 (1962-12-01), Glasgow
patent: 3291536 (1966-12-01), Smoot
patent: 3423131 (1969-01-01), Weeks
patent: 3434808 (1969-03-01), Pobst, Jr.
patent: 3708207 (1973-01-01), Steele
patent: 3782863 (1974-01-01), Rupp
Semi-Bulk Systems, Inc.
Smith Leonard E.
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