Dispensing – With discharge assistant – Motor operated
Patent
1987-08-27
1989-04-25
Rolla, Joseph J.
Dispensing
With discharge assistant
Motor operated
222372, 222390, 92 33, G01F 1102
Patent
active
048239925
ABSTRACT:
A metering device for feeding liquids, in particular chemical components for the production of polyurethane mixtures in a high-pressure mixing head.
The device comprises at least a first and a second metering unit of the type having a cylindrical chamber in which a plunger slides to displace a pre-established volume of liquid during its stroke and to feed it to the mixing head. The plunger is connected to a worm screw control device, in which the worm screw control devices of the metering units are interconnected by a mechanical drive actuated by a driving motor; one or more revolution variators can be disposed in the mechanical interconnecting transmission in order to vary the ratios between the speeds of the plungers and, therefore, the quantities metered in relation to the stochiometric ratios between the liquids to be mixed.
REFERENCES:
patent: 500035 (1893-06-01), Pfenning
patent: 1951504 (1934-03-01), Morris
patent: 2172517 (1939-09-01), Papini
patent: 3390815 (1968-07-01), Kavan et al.
patent: 3989223 (1976-11-01), Burkhardt et al.
patent: 4116112 (1978-09-01), Hampejs
patent: 4485725 (1984-12-01), Tootle
patent: 4653675 (1987-03-01), Ratzky
AFROS S.p.A.
Pedersen Nils E.
Rolla Joseph J.
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