US4067230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual turbine in-line viscometer and flowmeter
Assignee: Individual
•
Filing: 1976-12-15
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Granted: 1978-01-10
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Expires: 1996-12-15
Abstract
Abstract A viscometer for use in making viscosity measurements under operating conditions. The viscometer includes a large turbine and a small turbine both operated by the in-line fluid flow. By operating the two turbines simultaneously a comparison of their output frequencies can be made to indicate the ratio point and the viscosity of the fluid flowing is determined from the ratio point.
Inventors
- 👤 John M. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:06
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
An apparatus for making fluid flow viscosity measurements during operating conditions comprising: a dual turbine in-line viscometer; said viscometer including an upstream flow straightner; a turbine housing; a turbine disposed in said housing; a downstream flow straightner; a second upstream flow straightner; a second turbine housing; a second turbine disposed in said second housing and a second downstream flow straightner; said second upstream flow straightner, second turbine housing, second turbine and second downstream flow straightner being of a smaller diameter than said first upstream flow straightner, turbine housing, turbine and downstream flow straightner; a frequency indicator connected to each of said housings; a frequency readout for reading each separate frequency and a frequency ratio indicator for comparing each of said frequency response; said in-line viscometer being provided with a temperature probe encased by insulation to control the temperature of said viscometer.
Claim 2
Independent Claim
141 words
An apparatus for making fluid flow viscosity measurements during operating conditions comprising: a dual turbine in-line viscometer; said viscometer including an upstream flow straightner; a turbine housing; a turbine disposed in said housing; a downstream flow straightner; a second upstream flow straightner; a second turbine housing; a second turbine disposed in said second housing and a second downstream flow straightner; said second upstream flow straightner, second turbine housing, second turbine and second downstream flow straightner being of a smaller diameter than said first upstream flow straightner, turbine housing, turbine and downstream flow straightner; a frequency indicator connected to each of said housings; a frequency readout for reading each separate frequency and a frequency ratio indicator for comparing each of said frequency response; said in-line viscometer being provided with a temperature probe encased by insulation to control the temperature of said viscometer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |