Screw pump

Details Screw pump Screw pump

1990-09-21

1992-04-07

Look, Edward K.

Rotary kinetic fluid motors or pumps

Runner has spirally arranged blade or fluid passage

Extending along runner axis

415 73, 415 74, 415125, 415220, 416176, 416177, 366299, F01D 500

Patent

active

051022940

ABSTRACT:
A screw pump for feeding highly viscous material such as mixed concrete and the like. Plural projections engage the helical screw of the screw pumps to facilitating removal of the material such as gravel caught in the screw pump. Further for preventing excessive force from being exerted on the screw because of material caught in the screw pump, a spring is interposed between partitioning plates and hydraulic cylinders or crank mechanisms. Further, to make the position of the holder for the partitioning plate stable, plural rollers are provided above the holders.

REFERENCES:
patent: 860712 (1907-07-01), Waddell
patent: 3676034 (1970-05-01), Wendricks
patent: 4531892 (1985-07-01), Nasman et al.
patent: 4772177 (1988-09-01), Hayashi
patent: 4960328 (1990-10-01), Schumacher
patent: 5025287 (1991-06-01), Hilbert

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