Viscous material pump

Details Viscous material pump Viscous material pump

1993-04-28

1994-08-09

Gluck, Richard E.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 44A, 417205, 417900, F04B 3502

Patent

active

053360524

ABSTRACT:
The present invention relates to a viscous material pump. According to the invention, a pressure sensor is associated with the hydraulic drive cylinder of the fixed displacement pump for generating a pressure signal when a first sudden pressure increase occurs after the drive piston moves out of its end position. The volume subsequently displaced by the conveying piston corresponds to the actual delivery volume during the pumping stroke. A processor calculates the actual delivery volume for each pumping stroke using the ratio between the stroke time, as defined by the occurrence of the pressure peak and the maximum available conveying volume of the cylinder, as defined by the stroke time the piston needs to move from its first to its second end position. The present invention further provides for adjusting the supply volume of a supply means discharging the material to the viscous material pump. To this purpose the pumping stroke time of the conveying cylinder up to the pressure increase in the drive cylinder is compared with a predetermined time for generating a signal to increase the supply volume when the measured stroke time exceeds a predetermined time.

REFERENCES:
patent: 3234882 (1966-02-01), Douglas et al.
patent: 4531892 (1985-07-01), Nasman
patent: 4575313 (1986-03-01), Rao et al.
patent: 5106272 (1992-04-01), Oakley et al.
patent: 5174732 (1992-12-01), Hoya
patent: 5222872 (1993-06-01), Marian et al.

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