Adjustable flow rate controller for polymer solutions
US4276904A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1976 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Sep 1, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87265
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.