Abstract Apparatus for measuring rheological values, such as the viscosity and visco-elasticity, of substances capable of flowing, by means of two measuring tubes of different length, by determining the relationship between the throughflow per unit of time and the relevant pressure loss in the measuring tubes comprises two measuring tubes of different length but of equal diameter. The measuring tubes are associated with two measuring chambers which are connected to two pump cylinders having the same delivery performance by means of connecting conduits. Each of the pump cylinders accommodates a piston adapted to be driven by one common motor via its piston rod at an equal and constant speed. Furthermore, a differential pressure meter is mounted between the two measuring chambers which are connected up to said measuring tubes, said pressure meter indicating the differential pressure caused by the difference in the length of the measuring tubes and said differential pressure providing a measure of the value to be determined.
Apparatus for measuring rheological values such as the viscosity and visco-elasticity of substances capable of flowing, said apparatus comprising: a. two measuring tubes having equal diameters and different lengths with respect to each other, b. each of two separate measuring chambers connected to a respective one of said measuring tubes, c. two pump cylinders each having a piston and rod and the same delivery performance, d. conduits for connecting each of said pump cylinders to a respective one of said measuring chambers, e. single means for driving the piston and rod of each pump cylinder simultaneously at an equal and constant speed, f. a differential pressure meter connected to both of the chambers for indicating the differential pressure caused by the difference in the length of the measuring tubes, g. said chambers each including a movable diaphragm, and h. means for conveying a special driving liquid on one side of the diaphragms, through said pump cylinders and differential pressure meter.
Claim 2
Dependent Claim
160 words
Apparatus for measuring rheological values such as the viscosity and visco-elasticity of substances capable of flowing, said apparatus comprising: a. two measuring tubes having equal diameters and different lengths with respect to each other, b. each of two separate measuring chambers connected to a respective one of said measuring tubes, c. two pump cylinders each having a piston and rod and the same delivery performance, d. conduits for connecting each of said pump cylinders to a respective one of said measuring chambers, e. single means for driving the piston and rod of each pump cylinder simultaneously at an equal and constant speed, f. a differential pressure meter connected to both of the chambers for indicating the differential pressure caused by the difference in the length of the measuring tubes, g. said chambers each including a movable diaphragm, and h. means for conveying a special driving liquid on one side of the diaphragms, through said pump cylinders and differential pressure meter.
Claim 3
Dependent Claim
51 words
Apparatus as defined in claim 1 wherein said cylinders are connected at one end of said respective chambers and said measuring tubes are connected to the other end of said respective chambers, said differential pressure meter being connected to the ends of the measuring chambers on which the driving liquid acts.
Claim 4
Dependent Claim
81 words
Apparatus as defined in claim 1 wherein each said diaphragm has the shape of a finger stall with an open end and a closed end and each said chamber has an appropriate recess for receiving a respective diaphragm which is disposed with its closed end subjected to said special driving liquid, each of said measuring tubes being unmovably connected to the open end of a respective diaphragm, said diaphragm being effective to contain a preselected quantity of substance to be measured.