US3886971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating the ratio of mixing of two fluid flows
Assignee: Individual
•
Filing: 1973-03-20
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Granted: 1975-06-03
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Expires: 1993-03-20
Abstract
Abstract An apparatus for regulating the composition of a mixture of two fluid flows or the flow rate of one fluid comprises a plurality of parallel flow resistors, such as tubes, having relative fluid conductivities in accordance with a binary system, i.e., 1,2,4,8. . . . n. Valves connected to the flow resistors are used to insert the resistors in either fluid flow or to turn the resistors on and off.
Inventors
- 👤 Jorgen Schjerning Lundsgaard
- 👤 Hans Peter Degn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/80; B01F35/83; G; G05; G05D; G05D11/00; G05D11/02; G05D11/035; B01F35/81; B01F23/00; B01F23/10; B01F23/40; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87281; Y10T137/8729; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
An apparatus for regulating the ratio of mixing two fluids from separate fluid supplies while maintaining a constant overall flow rate of the fluids, the apparatus comprising: two identical sets of parallel connected flow resistors, the ratios of the fluid conductivities of said resistors of each set being in accordance with a binary system; valve means including a plurality of two-way valves for connecting said resistors into the flow path of a respective fluid, the inlets of each of said sets being connected to a respective fluid supply and the outlets of said flow resistors of said sets having the identical fluid conductivity being connected to inlets of a respective said two-way valve such that only one flow resistor of each conductivity valve is connected at a time for enabling flow in its respective flow path, and the outlets of said two-way valves being interconnected for combining the fluids into a single flow path.
Claim 2
Independent Claim
154 words
An apparatus for regulating the ratio of mixing two fluids from separate fluid supplies while maintaining a constant overall flow rate of the fluids, the apparatus comprising: two identical sets of parallel connected flow resistors, the ratios of the fluid conductivities of said resistors of each set being in accordance with a binary system; valve means including a plurality of two-way valves for connecting said resistors into the flow path of a respective fluid, the inlets of each of said sets being connected to a respective fluid supply and the outlets of said flow resistors of said sets having the identical fluid conductivity being connected to inlets of a respective said two-way valve such that only one flow resistor of each conductivity valve is connected at a time for enabling flow in its respective flow path, and the outlets of said two-way valves being interconnected for combining the fluids into a single flow path.
Claim 3
Independent Claim
154 words
An apparatus for regulating the ratio of mixing two fluids from separate fluid supplies while maintaining a constant overall flow rate of the fluids, the apparatus comprising: two identical sets of parallel connected flow resistors, the ratios of the fluid conductivities of said resistors of each set being in accordance with a binary system; valve means including a plurality of two-way valves for connecting said resistors into the flow path of a respective fluid, the inlets of each of said sets being connected to a respective fluid supply and the outlets of said flow resistors of said sets having the identical fluid conductivity being connected to inlets of a respective said two-way valve such that only one flow resistor of each conductivity valve is connected at a time for enabling flow in its respective flow path, and the outlets of said two-way valves being interconnected for combining the fluids into a single flow path.
Claim 4
Independent Claim
154 words
An apparatus for regulating the ratio of mixing two fluids from separate fluid supplies while maintaining a constant overall flow rate of the fluids, the apparatus comprising: two identical sets of parallel connected flow resistors, the ratios of the fluid conductivities of said resistors of each set being in accordance with a binary system; valve means including a plurality of two-way valves for connecting said resistors into the flow path of a respective fluid, the inlets of each of said sets being connected to a respective fluid supply and the outlets of said flow resistors of said sets having the identical fluid conductivity being connected to inlets of a respective said two-way valve such that only one flow resistor of each conductivity valve is connected at a time for enabling flow in its respective flow path, and the outlets of said two-way valves being interconnected for combining the fluids into a single flow path.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 1, wherein said valve means are magnetic valves controlled by digital signals.
Claim 6
Dependent Claim
12 words
An apparatus according to claim 1, wherein the flow resistors are tubes.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |