US3671025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mixing device
Assignee: Individual
•
Filing: 1971-05-03
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Granted: 1972-06-20
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Expires: 1991-05-03
Abstract
Abstract A fluid mixing device suitable for oil burner use comprises an outer cylindrical tubular member and an inner cylindrical tubular member provided with a flared bell at one end thereof. The outer peripheral lip of the bell has a diameter thereacross which is at least half the inner diameter of the outer tubular member, for defining a narrow annular venturi orifice of substantially constant radial dimension. Air flowing in the outer tubular member increases in velocity and decreases in pressure at the orifice for drawing oil from the inner tubular member in order to produce a finely mixed fog beyond the flared bell.
Inventors
- 👤 Perry R Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:11
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/40; F23D11/402; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3124; B01F25/31241
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
269 words
A venturi device comprising: a tubular member for receiving and directing a first stream of fluid in a direction longitudinal thereof; and a conduit member centrally positioned in said tubular member, said conduit member being adapted to conduct a second stream of fluid into the interior of said tubular member in the direction of flow of said first stream of fluid, said conduit member and said tubular member forming an annulus therebetween, said annulus having constant inner and outer radii over the major portion of its length, said inner radius of said annulus increasing rapidly and substantially with respect to said outer radius in the region of the downstream terminus of said annulus to form a constriction therein, said constriction defining an annular venturi orifice through which said first stream of fluid accelerates and in which the pressure in said first stream of fluid decreases, said conduit member having a discharge opening adjacent said orifice for discharging said second stream of fluid into the interior of said tubular member, said conduit member being otherwise closed to said interior of said tubular member so that the entire flow of said first stream of fluid in said tubular member is discharged through said orifice, the maximum value of said inner radius of said annulus at said downstream terminus thereof being at least half the value of said outer radius at said terminus, said tubular member extending past said orifice to form a low pressure area downstream of said orifice and to redirect said second stream of fluid radially inwardly beyond said orifice for dispersion into said fluid of said first stream.
Claim 2
Dependent Claim
269 words
A venturi device comprising: a tubular member for receiving and directing a first stream of fluid in a direction longitudinal thereof; and a conduit member centrally positioned in said tubular member, said conduit member being adapted to conduct a second stream of fluid into the interior of said tubular member in the direction of flow of said first stream of fluid, said conduit member and said tubular member forming an annulus therebetween, said annulus having constant inner and outer radii over the major portion of its length, said inner radius of said annulus increasing rapidly and substantially with respect to said outer radius in the region of the downstream terminus of said annulus to form a constriction therein, said constriction defining an annular venturi orifice through which said first stream of fluid accelerates and in which the pressure in said first stream of fluid decreases, said conduit member having a discharge opening adjacent said orifice for discharging said second stream of fluid into the interior of said tubular member, said conduit member being otherwise closed to said interior of said tubular member so that the entire flow of said first stream of fluid in said tubular member is discharged through said orifice, the maximum value of said inner radius of said annulus at said downstream terminus thereof being at least half the value of said outer radius at said terminus, said tubular member extending past said orifice to form a low pressure area downstream of said orifice and to redirect said second stream of fluid radially inwardly beyond said orifice for dispersion into said fluid of said first stream.
Claim 3
Dependent Claim
41 words
The device according to claim 1 wherein said tubular member has substantially the same inside diameter on both upstream and downstream sides of said conduit member, the periphery of said conduit member being circular at the downstream terminus of said annulus.
Claim 4
Dependent Claim
71 words
The device according to claim 1 wherein the conduit member includes a downstream opening bell, said bell having a circular peripheral lip adjacent and defining said annular venturi orifice between said lip and the inside diameter of said first named tubular member toward which fluid of said second stream is drawn as a film on an inner surface of said bell for dispersal thereof into said fluid of said first stream.
Claim 5
Dependent Claim
36 words
The device according to claim 3 wherein the diameter of said conduit member over the said major portion of the length of said annulus is not more than 80 percent of the diameter of said bell.
Claim 6
Dependent Claim
32 words
The device according to claim 1 wherein the diameter of the periphery of said conduit member is at least 60 percent of the inside diameter of said tubular member at said orifice.
Claim 7
Dependent Claim
51 words
The device according to claim 1 further including a plug centrally located in said discharge opening of said conduit member blocking said opening on the downstream side of said conduit member except for an annular opening adjacent said annular venturi orifice and through which fluid of the second stream is drawn.
Claim 8
Dependent Claim
68 words
The device according to claim 3 further including a plug received in the throat of said bell blocking the throat of said bell on the downstream side of said bell except for an annular passage adjacent said orifice through which fluid of the second stream is drawn, said plug having a tapered head spaced from the inner wall of said bell to provide a tapered annular passage therebetween.
Claim 9
Dependent Claim
33 words
The device according to claim 7 wherein the head of said plug is recessed within said bell on the upstream side of a plane defined by the circular peripheral lip of said bell.
Claim 10
Dependent Claim
37 words
The device according to claim 1 wherein said tubular member is substantially free of obstructions therewithin on the downstream side of said conduit member for a distance at least equal to the diameter of said conduit member.
Claim 11
Dependent Claim
47 words
The device according to claim 7 wherein said plug includes a shank portion extending into said conduit member and which is threadably received therein, said plug being provided with a plurality of peripheral slots for connecting said tapered annular passage to said conduit member beyond said plug.
Claim 12
Dependent Claim
22 words
The device according to claim 3 wherein said bell is uniformly tapered on the inside and outside thereof to said peripheral lip.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |