US3650477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Choke
Assignee: Sovereign Finanz AG
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Filing: 1970-11-02
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Granted: 1972-03-21
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Expires: 1990-11-02
Abstract
Abstract A choke for the burner head in an oil-fired unit, comprising a cylindrical support adapted to fit over the orifice of an airsupply pipe, a flame-stabilizer funnel extending from the external rim of said support obliquely inwards, which stabilizer funnel, at its internal end, supports a turbulence-producing device having inclined blades and a central opening for an oil jet, the portion of the flame-stabilizer funnel which is adjacent to the support having an arcuate cross-sectional form whose tangent at the point of contact with the support makes an acute angle with said support, the flame-stabilizer funnel having a series of openings axially spaced from the turbulence-producing device and whose inner edges are offset radially outwards so that air jets passing through the openings are directed obliquely inwards.
Inventors
- 👤 Karl Ivar Ake Gulliksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/40; F23C; F23C7/00; F23C7/002; F23C7/004
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A choke for the burner head in an oil-fired unit, comprising a cylindrical support adapted to fit over the orifice of an airsupply pipe, a flame-stabilizer funnel extending from the external rim of said support obliquely inwards, which stabilizer funnel, at its internal end, supports a turbulence-producing device having inclined blades and a central opening for an oil jet, the portion of the flame-stabilizer funnel which is adjacent to the support having an arcuate cross-sectional form whose tangent at the point of contact with the support makes an acute angle with said support, the flame-stabilizer funnel having a series of openings axially spaced from the turbulence-producing device and whose inner edges are offset radially outwards so that air jets passing through the openings are directed obliquely inwards both axially and radially and towards said central opening for the oil jet.
Claim 2
Dependent Claim
140 words
A choke for the burner head in an oil-fired unit, comprising a cylindrical support adapted to fit over the orifice of an airsupply pipe, a flame-stabilizer funnel extending from the external rim of said support obliquely inwards, which stabilizer funnel, at its internal end, supports a turbulence-producing device having inclined blades and a central opening for an oil jet, the portion of the flame-stabilizer funnel which is adjacent to the support having an arcuate cross-sectional form whose tangent at the point of contact with the support makes an acute angle with said support, the flame-stabilizer funnel having a series of openings axially spaced from the turbulence-producing device and whose inner edges are offset radially outwards so that air jets passing through the openings are directed obliquely inwards both axially and radially and towards said central opening for the oil jet.
Claim 3
Dependent Claim
21 words
A choke as claimed in claim 1 in which said openings are circular and are uniformly distributed around the flame-stabilizer funnel.
Claim 4
Dependent Claim
26 words
A choke as claimed in claim 1, in which the axial length of the flame-stabilizer funnel is between 40 and 50 percent of its external diameter.
Claim 5
Dependent Claim
23 words
A choke as claimed in claim 3 in which the axial length of the flame-stabilizer funnel is 45 percent of its external diameter.
Claim 6
Dependent Claim
35 words
A choke as claimed in claim 1 in which the tangent at the junction of the arcuate section of the flame-stabilizer funnel with the support makes an angle of 45* to 65* with said support.
Claim 7
Dependent Claim
13 words
A choke as claimed in claim 5 in which said angle is 55*.
Claim 8
Dependent Claim
44 words
A choke as claimed in claim 1 in which the flame-stabilizer funnel comprises said portion adjacent to the support a cylindrical portion integral with said portion adjacent to the support, and a conical portion integral with said cylindrical portion and supporting said turbulence-producing device.
Claim 9
Dependent Claim
28 words
A choke as claimed in claim 7 in which the cylindrical portion has a length substantially the same as that of the said portion adjacent to the support.
Claim 10
Dependent Claim
31 words
A choke as claimed in claim 7 in which said openings are arranged in the portion adjacent to the support immediately next to where said portion merges into the cylindrical portion.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |