Apparatus for measuring rheological values of substances capable of flowing
Abstract
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.
Inventors
- 👤 Horst Chmiel
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |