US2812634A

US2812634A - Exhaust air jet

Info

Publication number: US2812634A
Application number: US466799A
Authority: US
Inventors: Haring Ralph
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-11-04
Filing date: 1954-11-04
Publication date: 1957-11-12
Anticipated expiration: 1974-11-12

Description

Nov. 12, 1957 R. HARING 2,812,634

EXHAUST A-IR JET Filed Nov. 4, 1954 INVENTOR. 4 1 PH HARM 6 ATTO/P/WFX United States Patent EXHAUST AIR JET Ralph Haring, Riverton, N. J.

Application November 4, 1954, Serial No. 466,799

1 Claim. (Cl. 60-32) The present invention relates to the exhaust pipe of a conventional motor vehicle and is concerned primarily with an attachment which introduces a jet of air into the exhaust pipe.

The exhaust pipe, together with the muffler, affects the operation of the internal combustion engine itself. Thus, such factors as gasoline and oil consumption, heat, formation of carbon deposits, wear on the piston rings, and power developed are all, to some degree, related to or dependent on the operation of the exhaust pipe. Then again, the noise of the mufller, the condensation of gases, the life of the muffler and the operation of the cooling system are also tied up with the functioning of the exhaust pipe.

With the foregoing conditions in mind the present invention has in view as its foremost objective the provision of an attachment which is intended to be applied to an exhaust pipe by being substituted for the end section thereof and which attachment includes means for introducing an air jet into the exhaust stream with many beneficial results resulting therefrom. These results may be briefly summarized as follows.

The reduction of pressure in the exhaust pipe that is caused by this air jet reduces the temperature of the exhaust pipe itself as well as that of the cooling system of the car. It causes better combustion in the engine with the resulting savings in gasoline and oil consumption. Carbon deposits are substantially reduced, if not completely eliminated, and the wear on the piston rings is reduced. Condensation of the gases from the exhaust pipe is reduced, if not eliminated, the noise of the muffier is reduced and the reduction of back pressure in the exhaust pipe gives greater power development. This, in turn, causes better pick up by the engine. The life of the mufiier is also increased.

In providing an attachment, of the character aforesaid, the invention contemplates substituting a tubular section for the end section of the exhaust pipe. Mounted on this substitute tubular section is an air scoop that presents a wide mouth for entrapping air due to movement of the vehicle and which scoop has a gradually diminishing cross section which terminates towards the rear at a point of communication with an oval-like opening formed in the wall of the tubular section. This wall is further deformed to provide a trough or groove of gradually di minishing depth from the opening forward.

Particular objects and advantages of the invention are tied up with the manner of securing the substitute section in position.

Another object of the invention is to provide, in a device of the character indicated, an air scoop having a screen across its open mouth for preventing the pickup of foreign matter which might tend to clog up the device. Following this same thought, a further object is to provide a guard in the form of a rearwardly inclined bar which extends over and in front of the mouth of the air scoop to prevent catching on twigs, branches and the like.

Various other more detailed objects and advantages of the invention, such as arise in connection with carry- 2,812,634 Patented Nov. 12, 1957 ing out the above-noted ideas in a practical embodiment, will in part become apparent and in part be hereinafter stated as the description of the invention proceeds.

The invention, therefore, comprises an exhaust air jet that consists essentially of a tubular section intended to replace the end portion of an exhaust pipe and which is provided with an air scoop having a screen and a guard, with the air scoop and tubular section properly shaped to provide for a good conductive communication from the air scoop to the tubular section so that the jet of air that is created is introduced into the tubular section in an efficient manner.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing wherein:

Figure 1 is a view in side elevation of an exhaust air jet designed in accordance with the precepts of this invention.

Figure 2 is a view in front elevation of the attachment.

Figure 3 is a transverse vertical section taken about on the plane represented by the line 3-3 of Figure 1.

Figure 4 is a longitudinal vertical section taken about on the plane represented by the line 4-4 of Figure 3; and

Figure 5 is another detailed vertical section taken about on the plane represented by the line 5-5 of Figure 2.

Referring now to the drawing wherein like reference characters denote corresponding parts, and first more particularly to Figure 1, a portion of an exhaust pipe is represented in broken outline at 10. It will be understood that the conventional exhaust pipe of the motor vehicle is cut off at an appropriate point to make room for the attachment of this invention and the portion at 10 represents the remaining part of the exhaust pipe.

The attachment of this invention includes as essential elements a tubular section 11 and an air scoop S. One end of this section 11 is split, as indicated at 12, to facilitate insertion of the exhaust pipe 10 therein and a clamping ring 13 is received in a groove 14 formed in the end portion of the section 11 so as to securely clamp this end portion about the exhaust pipe 10 and effect a good connection therewith. The end of the tubular section 11 remote from the clamping ring 13 may be supported from the chassis of the vehicle in any preferred manner, such as by the hanger at 15.

Referring now more particularly to Figures 3 and 4, the tubular section 11 is shown as being formed with a cut or slit at 16 and the wall immediately forwardly of this cut is deformed to provide a groove 17 of gradually diminishing depth with the deepest part of the groove being located at the cut 16. Thus, the end of the groove 17 and the cut 16 cooperate to define an oval shaped opening that establishes communication between the exterior and interior of the tubular section 11.

The air scoop S may be made from any appropriate material such as a sheet metal that is susceptible of being formed into the shape illustrated and comprises side walls 18 which are joined by a top bend 19 with the latter having a tongue-like extension 20 that is inserted through the cut 16 so that it underlies the wall of the tubular section 11. The side walls 18 are of gradually diminishing width from the front to the rear with the bend 19 assuming the inclined direction illustrated. Thus the forward edges of the walls 18 and bend 19 define the mouth of the air scoop which may be lined by the U-shaped member 21 of rubber or similar material. A screen 22 covers and protects this mouth.

A guard rail or rod 23 has its forward end anchored to the clamping ring 13 and extends rearwardly and outwardly in a position in which it protects the mouth of the air scoop S.

The air scoop S may be secured to the tubular section 3 11 in any preferred manner. As illustrated in the drawing, rivets 24 are employed for this purpose. However,

-it is understood that welding or soldering may be substituted for such a means of attachment.

Operation 7 creates a draft of air relative to the scoop S. The scoop S picks up the air and due to its gradually diminishing cross section the draft of air is formed into a jet which is introduced into the oval-like opening at the split 16 into the bore of the tubular section 11. This jet of air affords the advantages above listed. The screen 22 and guard rod 23 definitely prevent any foreign matter from being picked up by the scoop and thus entirely eliminates any possibility of impairing its operation.

While a preferred specific embodiment of the invention is hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact constructions, mechanisms and devices illustrated and described, because various modifications of these details may be provided in putting the invention into practice within the purview of the appended claim.

What is claimed is:

In an exhaust air jet, a tubular section formed with a transverse slit and having a wall on one side of said slit that is deformed to provide a trough of gradually diminishing depth, the end of said trough and said slit cooperating to define an oval shaped opening, and an air scoop mounted on said tubular section over said trough and slit, said air scoop comprising side walls, the edges of which are attached to said tubular section with the side walls being joined by a bend that is inclined relative to said tubular section, said bend having a tongue-like extension extending through said oval opening.

References Cited in the file of this patent UNITED STATES PATENTS