Arrangement for controlling the viscosity of a fluid
AssigneeITT Industries, Inc.
InventorAdriaan de Bok
Life of this patent
Estimating the term…
Abstract
A constant output pump delivers a portion of a fluid, the viscosity of which is to be controlled, into a measuring capillary tube to develop a pressure differential across the measuring capillary tube. Means are provided to sense the pressure differential and control the fluid viscosity in response thereto. A second capillary tube is adapted to receive all of the fluid discharged from the measuring capillary tube and an elastic fluid space is interposed between the measuring capillary tube and the second capillary tube. The flow resistance of the second capillary tube and the elasticity of the fluid space functions to make the pressure differential independent of static fluid pressure changes.
Claims9
A system for controlling the viscosity of a fluid, comprising:
- a constant output pump for pumping at least a portion of the fluid;
- a measuring capillary tube through which the output of the pump is forced to develop a differential pressure along said measuring capillary tube;
- means for sensing the differential pressure in said capillary tube and for developing a control signal for controlling the viscosity of said fluid;
- a second capillary tube associated with the measuring capillary tube for receiving the fluid discharged therefrom;
- and
- means for providing an elastic fluid space connected to a point between the measuring capillary tube and the second capillary tube, whereby said elastic fluid space cooperates with the resistance of the second capillary tube to dampen variations in the static pressure of the fluid so that the differential pressure in the measuring capillary tube is not effected thereby.
Dependencies are inferred from the claim text.