Pumps – Motor driven – Relatively movable pumping members driven by relatively...
Patent
1992-07-30
1993-10-12
Bertsch, Richard A.
Pumps
Motor driven
Relatively movable pumping members driven by relatively...
222383, 417344, 417346, 417507, 452 42, F04B 704, F04B 1700, B67D 540
Patent
active
052520374
ABSTRACT:
A piston pump for conveying fragile particulate food products without damaging the product. The pump includes a filler and a discharge conduit containing piston valves actuated by hydraulic cylinders. The pumping chamber in which the product is compressed is equipped with a linear displacement transducer/magnet sensor which senses not only the position, but the speed of the piston. In response to the sensor, a proportioning valve releases hydraulic fluid at increasing pressure to a desired maximum, to the hydraulic cylinder actuating the piston in the pumping chamber of a second pump operating in tandem with the first pump. The product is expelled alternatively from the two pumps at the maximum desired pressure appropriate for the character of the product. The pump also includes means for flushing the pump without dismantling.
REFERENCES:
patent: 3125257 (1964-03-01), Vukich
patent: 3589567 (1971-06-01), Massenbach
patent: 3994627 (1976-11-01), Calzolari
patent: 4527954 (1985-07-01), Murali et al.
patent: 4723581 (1988-02-01), Standenrausch
patent: 5029735 (1991-07-01), Dennis
Aseptic Technology Engineering Co.
Bertsch Richard A.
McAndrews Roland
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