Marco Seattle, Inc.

Stewart W Roach

Stanley R Hagedorn

An article transfer pumping system combining the effects of a jet pump and an air lift pump to minimize article damage while increasing lift capability and overall system efficiency. Air lift pump placement adjacent the pump inlet aerates the rising column of water with articles such as fish, even large salmon, being raised by the jet pump, whereas jet pump placement adjacent the discharge end of the conduit increases pump efficiency.

Composite pumping system

Pumping efficiency for fish and other articles has been achieved far beyond expectations. By extracting water and adding air at a location in the pumping system higher than the initial air injection point, thereby excluding a certain percentage of the water, efficiency is not only increased but variable control capabilities are achieved.

Growing community of inventors

Seattle, WA, United States of America

Stewart W Roach