US3852377A

US3852377A - Spit-back for carburators

Info

Publication number: US3852377A
Application number: US00264202A
Authority: US
Inventors: A Roy; L Heintzelman
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-06-19
Filing date: 1972-06-19
Publication date: 1974-12-03
Anticipated expiration: 1991-12-03

Abstract

The present invention relates to carburators, and more particularly to a spit-back device which may be readily secured to a carburator of standard manufacture. The device in question will facilitate the mixing of the incoming air with the fuel, and also will prevent the spilling over or the release of fumes to prevent explosions. The device operates on the principle of turbulence and the elimination of waste products.

Description

United States Patent 1 1 Heihtzelman et a1.

[ 1' Dec.3,1974

[ SPlT-BACK FOR CARBURATORS [21] Appl. No.: 264,202

[52] 11.8. C1 261/1, 55/218, 55/DIG. 28,

123/73 R, 123/142 [51] lint. C1. F02m 17/30 [58] Field of Search 261/79 1, D1656; 123/73 R, 142; 55/218, 240, 241, DIG. 28

[56] p A References Cited 7 l UNITED STATES PATENTS 3,231,249 1/1966 Kalert, Jr. 55/DlG. 28

a a Z a 3.710.560 1/1973 Maddocks 55/510 Primary Emminer--Frank W. Lutter Assistant Examiner-William Cuchlinski, Jr.

[ 5 7] ABSTRACT lence and the elimination of waste products;

11 Claims, 10 Drawing Figures PATEME' sac 31914 SHEET NF 2 SHEH 2 0? 2 SPIT-BACK FOR CARBURATORS This invention relates to automotive equipment, and more particularly it relates to carburators for internal combustion engines, and in the mainit provides a spitback device for combustion engines. The invention is an improvement over the prior art and it operates on .the principle of turbulence. As the air passes at high speed through the device it hits a number of baffle plates (in this case two) which are mounted in a cylindrical housing. The baffle plates are secured with one on either side of an entry channel or openings (a tube) and anchored in thecylinder. The baffle plates in the cylinder are mounted in tandem one above the other and are so positioned in the incoming air as to cause the air to circulate and to cause turbulence inside the periphery of the walls of the cylindrical housing. The in vention also provides an air vent which may be located on the top of the housing and may help to release fumes produced as the result of the mixing and the circulation of air and gas. Such a vent will help release the fumes to the atmosphere and help prevent accidental ignition of the gas and explosions.

While the above is the main improvement of our invention over the prior art, in addition, we are providing a discharge means so as to permit all wasted fuel to pass and to be discharged to the atmosphere. This means is arranged in such a manner as to prevent the waste from being ejected out from the device, and into the face or the clothing of a person standing nearby usually the op erator. This is a very important improvement not heretofor claimed in the prior art.

Relative to the detailed construction of our device, we are providinga vent tube which may be attached to a vent hole permitting safe passage of the waste from the spit-back. Furthermore, there is a cylinder with two baffle plates; one baffle plate above the other in tandem. One baffle plate near the top of the cylinder and another located below in the cylinder wall. The position of the baffle plates in the cylinder will cause air turbulance. However, instead of the cylinder one may utilize also a cone type housing with the baffle plates properly located in the cone one above the other one should be able to get as good a distribution of the air gas mixture as with the cylindrical housing. The cone housing may be used for special conditions.

ever, it is clear that the device can as well operate without the shield. The shield provides added safety.

The operation of our device is simplicity itself. When the carburator coughs" or spits back fumes, gas or oil, the residue will be trapped in the back side of the baffles. Afterwards this residue is sucked or pulled back into the carburator to be drained through an outlet hole or opening provided for this purpose in the bot tom of the spitback. The above described action also prevents pollution of the air by fumes, and dirtying and messing up of the machine and the operator, because it traps all the oil and the gas which internal combustion engines throw off by coughing through the carburator.

Accordingly, one object of the present invention is to provide means to prevent oil and gas in a spit-back from leaving the carburator.

Another object of the present invention is to provide a spit-back with a cylindrical housing, a number of baffie plates in the cylinder with the air and fuel passing through the cylinder creating a mixture and a mixing action to improve the final product of oil and air..

There is a cover. with holes to permit and to allow air to pass through the vent in the lower part of the cylinder housing into the carburator. The cylindrical housing may be round and elongated or round and coneshaped. Inside the housing the baffle plates are mounted one above the other substantialy as to be shown and described later. Furthermore, we are providing a special shield in the cylinder wall to prevent the spray of fuel from being ejected outside to endanger the operator. The shield may be mounted in the device in such a manner as to remain in the path of the fuel, with the fuel hitting first the shield before it is ejected onto the baffle plates. However, it must be realized that we do not wish to limit ourselves to this design alone. We can visualize the shield being build within the cylinder wall, or on the outside of it. The shield may work either way, and can be just as practical and efficient.

The shield may be build in such a manner as to easily slide in-and out into the cylinder (or cone) andlock in place to prevent it from accidentaly falling out. How- An additional object of this invention is to provide a baffle plate and means for mounting said plate in the device to prevent spit-back when the device coughs or spits fumes, gas or oil. I

This invention also contains certain other features of construction and the combination and arrangement of several parts to be hereinafter fullydescribed, illustrated in the accompanying drawings, and in the specifications, and specifically pointed out in the appended claims.

In describing the invention in detail, references will be had to the accompanying drawings where like character numerals denote like or corresponding parts throughout the several views in which:

FIG. 1 is a perspective view showing the spit-back device assembled to a carburator of standard make, personifying the embodiment of the present invention;

FIG. 2 is a partial cross-section or cut-away view through the spit-back illustrated in FIG. ll;

, FIG.3 is a perspective view in section showing details of the spit-back deviceand disclosing the position of the baffle plates;

FIG. 41 is a perspective view showing the spit-back with the baffles and the shield in the proper position within the cylinder;

FIG. 5 is a perspective view of the cylinder with its baffle plates disclosing the vent hole to prevent the cylinder from accidentaly exploding;

FIG. 6 is a perspective view of the carburator of standard make in its relationship to the spit back device shown in FIG. 5; I 7

FIG. '7 is a modification showing the application of baffle plates in a cone-shaped spit-back cylinder;

FIG. h is a perspective view of the cone-type spitback cylinder showing the position of the baffle plates and the vent hole;

FIG. 9 is a view showing the shield mounted in the cylinder; and

FIG. 10 is a perspective view of the cover'which keeps the cylinder in assembly and encloses the baffle plates.

DESCRIPTION More particularly-to the device embodying the present invention, and referring to FIG. I, it shows the manher in which the spit-back device 20, by means of a flat circular cover, and its

mounting screws

22, 23 and 24, inclusive, may be securely held to the standard type carburator housing or casting 25. It can be seen that the spit-back may be provided with an air vent pipe or connection 26, and an exhaust or drain pipe 27, substantially as indicated.

FIG. 2 shows the spit-back device (in upright position) and in section to disclose pertinent details. It can be discerned that the spit-back device comprises a cylindrical outer housing 20a and an inner cylindrical housing 28 which in the upper end thereof has the cover 29, with a number of air intake openings 30 to permit air to enter into the spit-back device. Furthermore, the inside of the cylinder 28 (which is hollow) can be provided with a number of baffle plates, in this case two, 31 and 32, inclusive, which are arranged in such a manner, one above the other, as to be positioned in the path of the incoming air to help create a turbulence and to assure that the air and the incoming fuel is properly mixed before they are delivered to the engine. In FIG. 2, it can be seen that the device 20 can be secured upon the carburator casting 25, with the latter provided with an air entry section 33. Within the section 33 there is provided a hingeable baffle valve 34 which by means of the operating shaft 35 and the arm 36 can be hinged to close and to open the air suction opening 33, by the will of the operator.

FIG. 3 substantially is the same as FIG. 2, however, in perspective .view, showing all the details in the spitback device. It can be discerned that the

baffle plates

31 and 32 are mounted one above the other within the cylinder 28. Alsoit clearly shows the position of the carburator valve 34 in the carburator casting 25, the operating shaft 35, and the operating handle 36.

FIG. 4 is similar to the perspective view in FIG. 3, however, it further indicates the position of the shield 37 which prevents the pitting of fuel and gas from the spit-back above described. Perspective FIG. 5 clearly shows the relative positions of the

baffle plates

31 and 32, and their relationship in thecylinder 28 and the cylinder 20a. Also it clearly shows the position of the drain pipe 27.

Perspective view in FIG. 6 indicates the relative position of the carburator baffle plate 34 (or valve) within the carburator casting 25. Also the position of the shaft 35 and the handle 36 for operating the carburator valve.

FIGS. 7 and 8 show the use of a cone-shaped tube 38 as an inner mixing chamber, with the narrow end of the tube being mounted against the carburator. Cone 38 includes baffle, plates 31a and 320, as employed in cylindrical chamber 28 A drain'hole 27a is also shown in FIG. 8. This drain hole is positionedso that it is in the bottom side of the tube when it is laterally mounted on a carburator, as shown in FIG. I. A corresponding hole 260 for air vent 26 is formed in the top of the cone.

Openings

26a and 27a also are tion on the cylinder 28. I

FIG. 9 shows the manner in which the top plate or the shield 37 can be mountedwithin the cylinder or the mixing chamber 28, during assembly. The shield 37 has a pair of extensions or lugs 37a which are mounted'in a hole or an opening (see FIG. 4) in the cylinder housing to hold the shield permanently in place and to prevent its disengagement, FIG. 10 indicates the shape of the circular cover 21 which by means of three (or formed in a similar posimore) holes or openings 21a may be fastened to the device by means of screws.

The operation of the device is very simple. When the carburator coughs or spits" back fumes, gas and oil, the residue will be trapped in the rear side of the baffles and be drained later through an outlet holeor a drain pipe which is provided in the bottom of the spit-back device. The above described action also prevents air pollution and prevents spitting of oil and gas and endangering the safety of the operator.

A careful examination of the foregoing description in conjunction with the invention as illustrated in the drawings, will enable the reader to obtain a clear understanding and impression of the alleged features of merit and novelty, sufficient to clarify the construction of the inventionas hereinafter claimed. Minor changes in shape, size and materials, and rearrangement of parts may be resorted to in actual practice, as long as no deperture is made from the invention claimed.

Having described our invention, we claim the followmg:

I l. A spit-back device for a carburator having an air intake opening, said spit-back device comprising:

a hollow housing mounted over the air intake opening, said housing having a mixing chamber therein, with the mixing chamber having inlet means for introducing air into the mixing chamber and outlet means for delivering said air to the intake opening of the carburator, and

spaced baffle means mounted in the mixing chamber said baffle means and and extending across a portion of said chamber preventing any fuel and residue spit back from the carburator through the carburator intake opening into said housing from escaping from said housing inlet means.

2. A spit-back device as claimed in claim 1 wherein the baffle means comprise:

at least two baffle plates mounted in the mixing chamber, said baffle plates being positioned on opposite sides of the mixing chamber and being spaced apart longitudinally along the mixing chamber between the inlet and outlet means said baffle plates overlapping so as to prevent spitback through the inlet.

3. A spit-back device as claimed in claim 2 wherein:

chamber a sufficient distance to cause the air passing through the mixing chamber to follow a generally S- shaped path in passing by the baffle plates.

5. A spit-back device as claimed in claim 4 wherein the mixing chamber is cylindrical.

6. A spit-back device as claimed in claim 5 wherein the mixing chamber is conical, with the narrower end being the outlet means.

7. A spit-back device as claimed in claim 2 and further comprising perforated cover means over the inlet means of themixing chamber, said cover means being ther comprising shield means positioned in the spitback device between the carburator intake opening and the baffle means, said shield means being adapted to deflect fuel that is spit back through the carburator air intake opening before it reaches the baffle means.

llll. A spit-back device as claimed in claim 1 wherein the outer housing and mixing chamber comprise concentric tubular members.

I UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 52,377 .Dated December 3, 1974 Invent0 (s) Heintzelman et a1.

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 3, line 38 "pitting" should be spitting Column 4,

lines

31 and 32 "said baffle means and and extending across a portion of said chamber preventing any fuel and resi-" should beand extending across a portion of said chamber and said baffle means preventing any. fuel and resi- Signed and this 11th day of March 1975.

(SEAL) At t:

tes C. MARSHALL DANN RUTH C. MASON Commissioner of Patents Attesting Officer and Trademarks

Claims

1. A spit-back device for a carburator having an air intake opening, said spit-back device comprising: a hollow housing mounted over the air intake opening, said housing having a mixing chamber therein, with the mixing chamber having inlet means for introducing air into the mixing chamber and outlet means for delivering said air to the intake opening of the carburator, and spaced baffle means mounted in the mixing chamber said baffle means and and extending across a portion of said chamber preventing any fuel and residue spit back from the carburator through the carburator intake opening into said housing from escaping from said housing inlet means.

2. A spit-back device as claimed in claim 1 wherein the baffle means comprise: at least two baffle plates mounted in the mixing chamber, said baffle plates being positioned on opposite sides of the mixing chamber and being spaced apart longitudinally along the mixing chamber between the inlet and outlet means said baffle plates overlapping so as to prevent spitback through the inlet.

3. A spit-back device as claimed in claim 2 wherein: the mixing chamber is a hollow tube having open ends, with the inlet and outlet means of the mixing chamber being the open ends of the tube; the baffle plates are attached to the interior surface of the mixing chamber and are inclined inwardly toward the mixing chamber outlet means.

4. A spit-back device as claimed in claim 3 wherein the baffle plates are flat and each baffle plate extends about half way across the mixing chamber, the baffle plates being spaced apart longitudinally in the mixing chamber a sufficient distance to cause the air passing through the mixing chamber to follow a generally S-shaped path in passing by the baffle plates.

7. A spit-back device as claimed in claim 2 and further comprising perforated cover means over the inlet means of the mixing chamber, said cover means being adapted to permit air to pass through said cover means into the mixing chamber.

8. A spit-back device as claimed in claim 1 and further comprising drain means in the side of the spit-back device for conveying fuel and residue trapped by the baffle plates out of the spit-back device.

9. A spit-back device as claimed in claim 8 and further comprising air vent means in the top side of the spit-back device for releasing fumes from the spit-back device.

10. A spit-back device as claimed in claim 1 and further comprising shield means positioned in the spit-back device between the carburator intake opening and the baffle means, said shield means being adapted to deflect fuel that is spit back through the carburator air intake opening before it reaches the baffle means.

11. A spit-back device as claimed in claim 1 wherein the outer housing and mixing chamber comprise concentric tubular members.