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US3970388A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid stopped-flow apparatus

Assignee: Individual
•
Filing: 1974-07-15
•
Granted: 1976-07-20
•
Expires: 1994-07-15
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Abstract

Abstract Apparatus for evaluating the characteristics of mixed fluids while under a static or "stopped-flow" condition. Fluid injector pistons force the fluids to be mixed into a mixing chamber, and from the mixing chamber the fluids enter an evaluation or test cell. An amount of mixed fluid in excess of that required to occupy the evaluation cell is introduced into the cell with the excess fluid being exhausted from the cell into an accumulator which maintains a pressurized fluid state. The evaluation cell includes quartz windows permitting light to pass through the cell after flow of the mixed fluid ceases after termination of the fluid injection, and the evaluation cell may also include electrodes to permit both light transmitting characteristics and electrical characteristics of the mixed fluid to be tested. The subsequent cycle of operation purges the cell of the previously mixed fluid permitting a fresh mixture to be introduced into the cell for testing and evaluation. Injection of the fluids into the mixing chamber may be produced with a combination electrical-mechanical drive mechanism, or may be produced by a pressurized fluid, such as compressed air.

Inventors

  • 👤 Charles L. Hacker

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 22:22
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 196 words
Apparatus for rapidly mixing fluids for evaluating the mixture while in a static condition comprising, in combination, an evaluation cell having an inlet and an outlet, fluid evaluation means directly associated with said cell, a fluid mixing chamber communicating with said cell inlet, a pair of injector chambers each having an inlet and an outlet and a piston slidably located therein, said chamber's outlets communicating with said mixing chamber and said inlets communicating with fluid supply means, a compression spring drivingly connected to said pistons for biasing said pistons into its associated injector chamber to force fluid therein into said mixing chamber and cell, an electric motor having a rotatable output drive shaft, a first cam mounted upon said drive shaft, a first cam follower engageable by said cam compressing said spring during partial rotation of said drive shaft, a valve within said cell outlet controlling exhausting of said cell, a second cam mounted upon said drive shaft, a second cam follower engaging said second cam controlling operation of said valve opening said valve after compression of said spring whereby opening of said valves causes said pistons to inject fluid into said mixing chamber and cell.
Claim 2
Dependent Claim 196 words
Apparatus for rapidly mixing fluids for evaluating the mixture while in a static condition comprising, in combination, an evaluation cell having an inlet and an outlet, fluid evaluation means directly associated with said cell, a fluid mixing chamber communicating with said cell inlet, a pair of injector chambers each having an inlet and an outlet and a piston slidably located therein, said chamber's outlets communicating with said mixing chamber and said inlets communicating with fluid supply means, a compression spring drivingly connected to said pistons for biasing said pistons into its associated injector chamber to force fluid therein into said mixing chamber and cell, an electric motor having a rotatable output drive shaft, a first cam mounted upon said drive shaft, a first cam follower engageable by said cam compressing said spring during partial rotation of said drive shaft, a valve within said cell outlet controlling exhausting of said cell, a second cam mounted upon said drive shaft, a second cam follower engaging said second cam controlling operation of said valve opening said valve after compression of said spring whereby opening of said valves causes said pistons to inject fluid into said mixing chamber and cell.
Claim 3
Dependent Claim 23 words
In a fluid mixing apparatus as in claim 1 wherein said fluid evaluation means includes light transmitting window means defined in said cell.
Claim 4
Dependent Claim 23 words
In a fluid mixing apparatus as in claim 2 wherein said fluid evaluation means includes a pair of spaced electrodes within said cell.
Claim 5
Dependent Claim 32 words
In a fluid mixing apparatus as in claim 2 wherein said cell comprises an elongated chamber having spaced opposed ends, a light transmitting window being located at each of said cell ends.
Claim 6
Dependent Claim 28 words
Apparatus for rapidly mixing fluids as in claim 1, an accumulator communicating with said cell outlet, and pressure producing means within said accumulator maintaining fluid therein under pressure.

References Cited (Backward Citations)

US2254782A Cited
US3527570A Cited
US3622795A Cited
US3635564A Cited
US3705773A Cited
US3874850A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-07-20 1980-01-19 1980-07-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-07-20 1984-01-19 1984-07-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-07-20 1988-01-19 1988-07-20 $7700.00 Window Closed / Lapsed

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