Pumps – Plural pumps with individual or relative control
Patent
1977-09-12
1979-10-09
Schwadron, Martin P.
Pumps
Plural pumps with individual or relative control
137238, 137312, 277 2, 277 15, 422133, F04B 2304, F16J 1540
Patent
active
041704401
ABSTRACT:
A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.
REFERENCES:
patent: 332346 (1885-12-01), Jungenfeld et al.
patent: 450518 (1891-04-01), Mayer
patent: 1572922 (1926-02-01), Govers et al.
patent: 3124079 (1964-03-01), Boyer
patent: 3943717 (1976-03-01), Schexnayder
patent: 4074752 (1978-02-01), Schlosberg
Bairunas Robert A.
Commette Denis S.
Gusmer Frederick E.
Gerard Richard
Gusmer Corporation
Schwadron Martin P.
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