US3907210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to improve combustion of fuel
Assignee: Individual
•
Filing: 1974-04-04
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Granted: 1975-09-23
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Expires: 1994-04-04
Abstract
Abstract Preheated secondary combustion air is delivered across the axis of the burner flame in an oil-fired boiler. By virtue of a secondary combustion air delivery apparatus, the secondary air is heated in three stages before delivery into the flame and is then delivered in a multiplicity of evenly pressurized air jets to control the size of the flame while increasing the heat thereof. A substantial savings of fuel is obtained and boiler efficiency is increased.
Inventors
- 👤 Jr Irving A Dow
- 👤 Carl A Gersitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:37
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/02; F23C; F23C7/00; F23C7/02; F23C7/06; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
An apparatus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its side wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through its side wall remotely from the sleeve wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, said baffle means extending from the outer surface of said sleeve to the inner surface of said envelope, thereby defining a first and second cavity, means for forcing said air to contact said envelope in a lingering fashion for causing heat transfer from said envelope to said air comprising openings in said baffle means.
Claim 2
Independent Claim
159 words
An apparatus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its side wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through its side wall remotely from the sleeve wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, said baffle means extending from the outer surface of said sleeve to the inner surface of said envelope, thereby defining a first and second cavity, means for forcing said air to contact said envelope in a lingering fashion for causing heat transfer from said envelope to said air comprising openings in said baffle means.
Claim 3
Dependent Claim
149 words
An appartus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its side wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through iTs side wall remotely from the sleeve side wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, said sleeve and envelope are concentric cylinders and said baffle means consists of a pair of baffle plates extending diametrically of the sleeve and envelope in the chamber formed therebetween, said baffle plates each having a plurality of longitudinally spaced equally sized openings.
Claim 4
Dependent Claim
149 words
An appartus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its side wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through iTs side wall remotely from the sleeve side wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, said sleeve and envelope are concentric cylinders and said baffle means consists of a pair of baffle plates extending diametrically of the sleeve and envelope in the chamber formed therebetween, said baffle plates each having a plurality of longitudinally spaced equally sized openings.
Claim 5
Dependent Claim
58 words
The apparatus as defined by claim 2, and an end wall closing one end of said sleeve exteriorly of said envelope, said end wall having a single aperture, and an inclined deflector element on said end wall to divert air discharging from said aperture into a jet having an inclined axis relative to the axis of said sleeve.
Claim 6
Dependent Claim
43 words
The apparatus as defined by claim 2, and said sleeve side wall openings spaced substantially 180* from the envelope side wall openings, said baffle plates spaced midway between the openings of the sleeve and envelope and dividing said chamber, said chamber being annular.
Claim 7
Dependent Claim
22 words
The apparatus as defined by claim 4, and the openings of said sleeve, baffle plates and envelope being successively smaller in size.
Claim 8
Independent Claim
214 words
An apparatus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through its side wall remotely from the sleeve side wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, and a pair of sleeves in spaced parallel relationship each having plural longitudinally spaced side wall openings, a coupling element common to said sleeves connected to corresponding ends thereof and adapted to receive air from a fan source, and said envelope being a low profile envelope surrounding the pair of sleeves and their openings and having plural spaced discharge openings in one side wall thereof between said sleeves, and said baffle means consisting of a pair of baffle plates extending between said sleeves and one side wall of the low profile envelope and disposed on opposite sides of the envelope openings and between the latter and the sleeve openings.
Claim 9
Independent Claim
214 words
An apparatus for delivering preheated secondary air into a burner flame comprising a sleeve adapted to receive air from a fan and having a plurality of longitudinally spaced openings in its wall, an envelope surrounding said sleeve and side wall openings and joined to the sleeve to form between the sleeve and the envelope a chamber for air, said envelope having a plurality of longitudinally spaced air discharge openings formed through its side wall remotely from the sleeve side wall openings, and baffle means interposed between the sleeve and envelope side wall openings to regulate the passage of air from the former to the latter, and a pair of sleeves in spaced parallel relationship each having plural longitudinally spaced side wall openings, a coupling element common to said sleeves connected to corresponding ends thereof and adapted to receive air from a fan source, and said envelope being a low profile envelope surrounding the pair of sleeves and their openings and having plural spaced discharge openings in one side wall thereof between said sleeves, and said baffle means consisting of a pair of baffle plates extending between said sleeves and one side wall of the low profile envelope and disposed on opposite sides of the envelope openings and between the latter and the sleeve openings.
Claim 10
Dependent Claim
44 words
The apparatus as defined by claim 6, wherein the side wall openings of the two sleeves diverge and have axes angled toward the wall of the envelope having the envelope openings and being angled away from corresponding sides of the pair of baffle plates.
Claim 11
Dependent Claim
32 words
The apparatus as defined by claim 7, and end walls closing corresponding ends of said sleeves, said end walls having small apertures, and deflector elements on said end walls adjacent said apertures.
Claim 12
Dependent Claim
30 words
The apparatus as defined by claim 6, and end walls on corresponding ends of said sleeves and having apertures, and deflector elements on the end walls adjacent to said apertures.
Claim 13
Dependent Claim
60 words
The apparatus as defined by claim 6, and said low profile envelope comprising a pair of opposing arcuate side walls joined at corresponding edges substantially outwardly on opposite sides of said sleeves and being symmetrical about said sleeves, the curvature of said envelope side walls conforming substantially to the curvature of a circular boiler with which the apparatus is employed.
References Cited (Backward Citations)
US1610542A
Cited
US3291182A
Cited
US3446566A
Cited
US3599877A
Cited
US3531053A
Cited
US3610530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |