Patent US2032031A successfully refreshed from Google Patents.
Patent US4300513A successfully refreshed from Google Patents.
US4300513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor attachment
Assignee: Individual
•
Filing: 1979-09-28
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Granted: 1981-11-17
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Expires: 1999-09-28
Abstract
Abstract A plate mounted between the carburetor and intake manifold having horizontally extending passageways and inlet and outlet ports communicating with four vertical apertures aligned with the passageways of the carburetor and intake manifold. Double-walled tubular heat exchangers, formed of spaced apart outer and inner jackets, are disposed in the vertical apertures, the spaces between the outer and inner jackets communicating with the plate passageways and being sealed from the inside of the inner jackets, such that engine coolant can be circulated through such spaces and through the plate to cause preheating of the fuel-air mixture as it passes through the inside of the exchangers and into the intake manifold. The inner periphery of each inner jacket has ring shaped serrations and a downward taper, which together with preheating by the heat exchangers results in significantly improved vaporization of the fuel-air mixture.
Inventors
- 👤 Dennis A. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:28
CPC Classifications
F; F02; F02M; F02M15/00; F02M15/02; F02M15/027; F02M19/00; F02M31/00; F02M31/02; F02M31/04; F02M31/10; F02M31/102; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
233 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular heating fluid chambers, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction and having a multiplicity of substantially annular sharp cornered surface undulations defining upwardly facing ledges adjacent the sharp corners.
Claim 2
Dependent Claim
233 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular heating fluid chambers, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction and having a multiplicity of substantially annular sharp cornered surface undulations defining upwardly facing ledges adjacent the sharp corners.
Claim 3
Dependent Claim
22 words
The attachment according to claim 1 and the tubes extending downwardly beyond the closed lower ends of the annular heating fluid chambers.
Claim 4
Dependent Claim
39 words
The attachment according to claim 1 and the tubes having upper ends defining out turned flanges sealed against the plate at the peripheries of the transverse openings and defining the closed upper ends of the annular heating fluid chambers.
Claim 5
Dependent Claim
22 words
The attachment according to claim 3 and the duct means opening into the annular chambers at locations adjacent the out turned flanges.
Claim 6
Dependent Claim
64 words
The attachment according to claim 1 and the plate having pairs of transverse openings of various smaller and larger sizes corresponding to the air-fuel mixture conveying passages of the carburetor, and the inlet end of the duct means having direct flow communication with the smaller sized transverse openings for supplying the hottest engine coolant to the annular heating fluid chambers adjacent the smaller openings.
Claim 7
Dependent Claim
229 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular heating fluid chambers, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction and having a multiplicity of substantially annular surface undulations defining inwardly protruding sharp cornered ribs.
Claim 8
Dependent Claim
229 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular heating fluid chambers, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction and having a multiplicity of substantially annular surface undulations defining inwardly protruding sharp cornered ribs.
Claim 9
Dependent Claim
23 words
The attachment according to claim 6 and the tubes having lower ends protruding downwardly from the plate to extend into the intake manifold.
Claim 10
Dependent Claim
216 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular chambers for heating the tubes, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction.
Claim 11
Dependent Claim
216 words
An attachment for connection with the cooling system of an internal combustion engine and for insertion between the carburetor and the intake manifold of the engine, comprising heat transfer means including upright heat transfer tubes to be positioned between and in open communication with the air-fuel mixture conveying passages of the carburetor and intake manifold to pass the air-fuel mixture therethrough, heat supplying means mounting and confining the outer peripheries of the heat transfer tubes and cooperating with the tubes in defining closed end annular heating fluid chambers around the tubes, the heat supplying means including a rigid plate to lie between the carburetor and intake manifold, the plate having transverse openings through which the heat transfer tubes extend, the peripheries of the transverse openings defining portions of said annular chambers, the tubes and heat supplying means maintaining the interiors of the tubes and said annular chambers in fluid flow isolation relative to each other, the plate having duct means therethrough in open flow communication with the transverse openings to direct hot engine coolant to and through the annular chambers for heating the tubes, the duct means having inlet and outlet ends for flow connections with the cooling system of the engine, and the inner peripheries of the tubes being tapered convergently in a downward direction.
Claim 12
Dependent Claim
25 words
The attachment of claim 8 wherein the downward taper of the inner peripheries of the heat transfer tubes is from about 1 to 3 degrees.
Claim 13
Dependent Claim
36 words
The attachment of claim 8 wherein the inner peripheries of the heat transfer tubes have steplike patterns of annular notches running from top to bottom and becoming progressively smaller in diameter due to the downward taper.
Claim 14
Dependent Claim
33 words
The attachment of claim 10 wherein said annular notches are in the form of annular grooves opening inwardly of the heat transfer tubes, the bottoms of the annular grooves having concave inner surfaces.
Claim 15
Dependent Claim
25 words
The attachment of claim 8 additionally comprising an asbestos gasket disposed between the upper surface of the plate and the lower surface of the carburetor.
Claim 16
Dependent Claim
37 words
The attachment according to claim 10 and the heat supplying means also including tubular jackets surrounding the heat transfer tubes and having lower ends sealed to the tubes and upper ends sealed to the plate opening peripheries.
References Cited (Backward Citations)
US1431281A
Cited
US1985271A
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US2857898A
Cited
US4031876A
Cited
US4108953A
Cited
US4130099A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |