System for pumping fluids at constant pressure

Details System for pumping fluids at constant pressure System for pumping fluids at constant pressure

1980-03-06

1983-02-15

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

By controlling drive motor motive fluid

60452, 60468, 417213, 417307, 417313, F04B 4900

Patent

active

043738648

ABSTRACT:
A constant pressure system for pumping a coal slurry includes a slurry pump mechanically driven by a hydraulic motor which, in turn, is driven by a hydraulic pump. The output of the hydraulic pump is controlled by a pressure sensitive flow control valve that maintains the hydraulic fluid pressure drop as a constant across the hydraulic motor. The system assures a constant hydraulic motor output torque, driving the slurry pump at a constant delivery pressure.

REFERENCES:
patent: 1042980 (1912-10-01), Shawver
patent: 2467398 (1949-04-01), Miller
patent: 2560807 (1951-07-01), Lobo
patent: 2648950 (1953-08-01), Miller
patent: 2669509 (1954-02-01), Sellers
patent: 2830769 (1958-04-01), Work
patent: 3168350 (1965-02-01), Phinney et al.
patent: 3219259 (1965-11-01), Horton
patent: 3715195 (1973-02-01), Tassoney et al.
patent: 3715301 (1973-02-01), Tassoney et al.
patent: 4028890 (1977-06-01), Habiger et al.
patent: 4122865 (1978-10-01), Budzich

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