Kenneth C Jackson

US Patent:

42769043, Jul 7, 1981

Filed:

Sep 1, 1976

Appl. No.:

5/719869

Inventors:

Kenneth M. Jackson - Bartlesville OK

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G05D 700

US Classification:

137599

Abstract:

An adjustable device for controlling the flow rate of polymer solutions which results in only little shearing of the polymer molecules, said device comprising an inlet manifold, an outlet manifold, a plurality of tubes capable of providing communication between said inlet and outlet manifolds, said tubes each having an internal diameter that is smaller than that of the inlet manifold and large enough to insure that viscosity of the polymer solution passing through each said tube will not be reduced more than about 25 percent, and a valve associated with each tube, said valve being capable of opening or closing communication in that tube between the inlet and outlet manifolds, each said valve when fully open having a diameter that is substantially at least as great as that of the tube with which it is associated.