US2060498A - Gasket for internal combustion engines - Google Patents

Description

Nov. 10, 1936. A. F. 6058 2,060,498

GASKET FOR INTERNAL COMBUSTION ENGINES Filed Sept. 29, 1934 A TTOR N E Y Patented Nov. 10, 1936 "PATENT OFFIC GASKET FOR INTERNAL COMBUSTIO ENGINES Arthur F. Gobb, Wyandotte, Mich, assignor to McCord Radiator & Mfg. 00., Detroit, Mich., a

corporation of Maine Application September 29, 1934, Serial No. 746,044

9 Claims.

This invention relates to internal combustion engines and particularly to a gasket structure adaptable for use therewith.

In many gasket installations one of the gasket functions is to prevent heat transfer between the elements which are connected by the gasket. For example, in modern internal combustion engines it has become a problem to prevent the conduction of heat from the intake manifold to the carburetor. It is highly necessary to prevent such heat transfer, as by a gasket, in view of the vapor-lock difliculties encountered if the gasoline in the carburetor attains its boiling temperature.

Another function performed by gaskets, particularly by the gasket placed between the carburetor and the intake manifold, is to support the weight of the carburetor and of the air cleaner if one is used. Consequently any gasket structure which may here be used must have, in addition to very good insulating properties, suflicient structural strength to withstand theloads imposed thereon by the carburetor. The scope of the problem becomes well understood when it is realized that the best heat insulating materials are relatively weak structurally.

One of the objects of this invention therefore is to provide a load bearing gasket having abnormally high heat insulating qualities.

Another object of this invention is to provide means for ventilating a gasket structure.

A still further object of this invention is to .provide an internal combustion engine structure in which the engine fan stream serves to circulate air through ventilating ducts provided in a gasket located within the fan stream.

Other objects of the invention will appear from the following description taken in connection with the. drawing, which forms a part of this specification, and in which:

Fig. 1 is a side elevational view of an internal combustion engine equipped with a gasket structure incorporating my invention;

Fig. 2 is an enlarged view in elevation of a portion of the internal combustion engine shown in Fig. 1, taken on the line 2-2 thereof;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 2;

Fig. 5 is a sectional view taken on the line 5-5 of Fig. 3, and

Fig. 6 is a sectional view of a modification of the gasket structure shown in Fig. 2, the section being taken on a line corresponding to the line 3-3 of Fig. 2.

Referring to Fig. 1, I0 illustrates a conventional internal combustion engine having an intake manifold ll fitted with a hot spot l2 connected to the exhaust system I3. The intake manifold is joined to a carburetor l6 fitted with an air cleaner IT. The carburetor and intake manifold are flanged as at! and I9 respectively, these flanges being connected in aigas tight relationship by a gasket 2|.

The engine cooling system, which includes an engine driven fan 22 creates a blast of airthe temperature of which is lower than that of the manifold. This air flowing rearwardly over the engine serves to cool the gasket 2| due to the fact that the gasket is located within the air stream. The gasket is made of suitable gasket material which may be asbestos, reinforced as in'the patent to Bailey, 1,968,365, issued July 31, 1934, or other heat insulating material having suflicient structural strength. As shown the gasket is made of a plurality of layers of asbestos. These layers each contain a centrally located hole, which in the completed gasket provides the gas passage 23. Each layer of asbestos is also punched to provide a pair of bolt holes 24. The several layers of asbestos may be bound together in any desired manner.

The central gas passage 23 may be lined with a cylindrical ring 26, made of asuitable smooth material, such as metal, in order to present a minimum of resistance to gas flow. As shown this ring extends axially of the passage 23 throughout a major portion of its length, and is crimped at its ends into the body of the gasket as at 21 and 28, being thus located within the gasket in order to avoid contact with the adjacent flanges l8 or l9. In this way heat conduction is still further minimized.

In order removably to join the two flanges, bolts 29 are inserted throughthe holes 24. As shown these may threadedly engage the flange l9. It will be noted that a washer 3| may be inserted between the flange l8 and the heads of the bolts still further to reduce the conduction of heat from the hot manifold to the carburetor.

' A slight clearance exists between the shanks of large to carry not only the bolt load but also the weight of the carburetor and the air cleaner.

In detail, the gasket comprises a plurality of layers 32 of asbestos material each having identical cut-out portions 34 and 36 extending inof the gasket. In stacking these identical layers alternate ones are turned upside down, the cutout portions of adjacent layers thus overlapping to form passage-ways or ducts 31, 38 extending axially of the gasket, between the central opening 23 and the bolt holes 24. The remainder of the cut-out portions togetherwith the adjacent layers which are not cut out, form ducts extending parallel to the bearing faces of the gasket and leading from the central ducts 31 and 38 to the exposed or non-bearing faces of the gasket. Thus the gasket structure is honey-combed with passageways communicating with the atmosphere at several points.

The open ends of the ducts lie, it will be noted in Fig. l, in the air stream flowing rearwardly from the fan 22. The air stream thus tends to increase the circulation of air through the body of the gasket and any heat which'may be conducted into the gasket from the hot manifold flange I9 is removed therefrom before it can reach the cooler carburetor flange I8.

A layer of gasket material 38 in which no cutout portions have been formed may be placed on top andeven on the bottom of the gasket and bound thereto in any convenient manner as by the flange on the cylinder 26. The will serve to. close the ends of the ducts 31 and 38 and keep them free from any dirt which might otherwise collect either during the handling or shipping of the gasket.

The structure illustrated in Fig. 6 is identical with that illustrated in Fig. 2 except for the cutout portions. In Fig. 6 it will be noted that, in each layer, there is a pair of slots or cut-out portions 39 and 4| lying between the opening 23 and the bolt holes 24. In the assembled gasket these extend from one side of the center line to the opposite exposed or non-bearing faces. When layers cut out in this manner are stacked with alternate layers turned upside down, it will be noted that a pair of ducts and 43 extend axially of the gasket in a manner similar to ducts 31 and 38.

Each layer of the modification shown in Fig. 6 also contains a pair of circumferentially extending slots 44 and 46 which in the assembled gasket substantially surround the aperture 23.

- In the assembled structure there is thus a passageway completely around the aperture 23,- the passageway being composed of slots in alternate layers of the gasket material and comprising, for example, the slot 44, the slot 46, the cut-out portion communicating with the axially extending duct 43, the cut-out portion 39 in the adjacent layer, the slot 46 and the slot 44, the slot 4|, the axial duct 42, and the cut-out portion 4| back to the slot 44. Thus no matter how the gasket is located with respect to the air stream, one or more of the ducts extending through to the ex,- posed faces of the gasket are bound to receive a portion of the air stream and ventilate the gasket.

While I have herein described in some detail a specific embodiment of my invention, which I deem to be new and advan a eous and may specifically claim, I do not desire it to be understood that my invention is limited to the exact details of the construction, as it will be apparent that changes may be made therein without departing from the spirit or scope of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a gasket, a plurality of sheets of gasket material, each of said sheets having cut-out portions therein, said portions being so arranged and said sheets being so superimposed as to form a plurality of passageways through the body of said gasket substantially parallel to a bearing face thereof.

2. A gasket comprising a plurality of sheets having identical cut-out portions, said sheets being alternately arranged whereby said cut-out portions overlap to form a passageway within the body of the gasket perpendicular to the bearing faces thereof, and a plurality of ducts substantially perpendicular to said passageway.

3. In a gasket having a central aperture, a plurality of circumferentially extending interconnected ducts within said gasket forming a passageway substantially surrounding said aperture and exposed to the atmosphere.

4. In a gasket having a central aperture, 9. circumferentially extending passageway substantially surrounding said aperture and in communication with the atmosphere, said passageway comprisinga plurality of overlapping ducts lying in adjacent planes. 7

5. A gasket comprising identical superposed layers of gasket material, each layer having identical cut-out portions therein extending to an edge thereof, the adjacent layers of said gasket being superposed with said cut-out portions extending alternately in opposite directions.

6. A gasket comprising identical superposed layers of gasket material, each layer having identical cut-out portions therein extending to an edge thereof, said cut-out portions in adjacent layers being overlapped in the assembled gasket to form an irregular passageway through said gasket.

'7. In a gasket body having a bearing face, a plurality of intersecting passageways in said body, at least one of said passageways lying at an angle to a bearing face of said gasket, and at least one of said passageways being in communication with the atmosphere.

8. In a multiple layer gasket, apertures in adjacent layers, said apertures being superposed to form a continuous passageway through said gasket, a slot in each of said'layers, said slots being superposed and extending in opposite directions from said continuous passageway whereby toform a plurality of irregular passageways intersecting said continuous passageway.

9. A gasket having an aperture therethrough.

the body ofv said gasket having a plurality of intersecting bores therein, said bores cooperating to form a passageway extending circumferentially of said aperture.

ARTHUR F. GOBB.

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