US1584215A - Exhaust muffling and cooling device - Google Patents

Description

May 11 1926.

L. E. CLAWSON EXHAUST MUFFLING mp COOLING DEVICE o i l Filed April 14. 1924 Patented May 11,

UNITED STATEElEi LEONARD E. CLAW'SON, OF SAN FRANCISCO, CALIFORNIA.

i EXHAUST MUFFLINCT AND COOLING DEVICE.

Aplication filed April 14, 1924, Serial No. 706,422. Renewed. March 22, 1926.

This invention relates to a combined muffiing and cooling device, and particularly to a device of this character which may be connected with the exhaust pipe of an automo bile or like motor driven vehicle.

The object of the present invention is to generally improve and simplify the COIlSlllllC'. tion and operation of mufflers of the character described; to provide a device which may be readily applied to a motor driven vehicle of the type propelled by an internal combustion engine and so connected with the ex haust pipe thereof that the sound of the discharging gases will be silent and muffled, and the gases expanded and cooled before discharging therefrom; and further, to provide means for mixing the gases with a large volume of fresh air, whereby to dilute the gases to such an extent as to render carbonmonoxide and other poisonous gases contained substantially harmless.

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawings, in which the figure is a perspective view of the combined muffler and cooler, one side of the device being removed and shown in section and other parts being broken away.

Referring to the drawing A indicates, in general, a rectangular shaped casing constructed of sheet metal or the like. The casing consists of two sides, atop and bottom section, and a pair of end sections. The casing is provided with a plurality of superposed interspaced partition members such as indicated at 2, 3, 4 and 5. These partition members extend substantially from end to end of the casing, but are staggered with relation to each other and as such form connecting passages or openings as indicated at 6, 7, 8 and 9.

The device is intended to be connected with the exhaust pipe of an internal combustion engine and this pipe is extended into the casing as indicated at 10. The pipe passes through an upper passage indicated at 11 and terminates in a goose-neck as indicated at 12, the goose-neck directing the gases into the next passage indicated at 13. The gases then flow through the communieating passage 7 into a passage 14 and they continue flowing in zigzag fashion through the passages indicated at 15 and 16, which are connected by means of the communicating openings 8 and 9, the gases being finally permitted to discharge through an end opening in the casing shown at 17.

The upper passage 11 is open at its forward end and it is provided with a funnel or the like as indicated at 18 to direct fresh air into the passage.

The passages 14: and 16 are provided with air inlet pipes 19 and 20 and their outer ends are'also provided with funnels as shown at 21 to concentrate and direct as large a volume of air as possible into the respective passages.

The device is particularly intended for use on automobiles and like vehicles which are driven by means of internal combustion engines, and it is therefore provided with one or more hangers as indicated at 22, whereby it may be attached to the main frame of a vehicle. The exhaust pipe is extended into the upper passage 11. The gases are directed into the next passage shown at 13 by means of the goose-neck termination shown at 12. The device is so applied to a vehicle that the funnels 18 and 21 will point to the forward end of the vehicle, while the discharge opening 17 will point to the rear end of the vehicle. Thus, when the vehicle is in motion a comparatively large volume of air is caught by the funnels and is directed into the communicating passages. The exhaust gases discharging from the pipe 10 are thus permitted to gradually expandand the sound or noise that would otherwise be produced is mutlied and silenced. The gases are at the same time mixed with such a large volume of air that they are rapidly cooled and they are furthermore so diluted before they are finally permitted to discharge through the opening 17 that the poisonous gases, such as carbon-monoxide, etc, are rendered substantially harmless.

The device is simple and compact in construction and may be attached to practically any standard type of motor vehicle now in use as it is merely necessary to connect the device to the exhaust pipe and then to attach it by means of the hangers or brackets 22 to the main frame or any other suitable support. The device will entirely obviate the use of the ordinary muffler and as such will permit removal of the same and the saving of power. It is well known that the majority o mufflers now in use causes a considerable back pressure on the exhaust pipe and engine and for this reason interfere with the full horse-power development of the motor. The present device overcomes this objection as it permits a tree escape and rapid expansion of the gases and as such will not impose a load on the motor. By diluting and cooling the gases and rendering them substantially harmless, danger to life and vegetation is materially reduced.

While certain features of the present invention are more or less specifically illustrated, I Wish it understood that various changes is form and proportion may be resorted to within the scope of the appended claim. I similarly Wish it understood that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate or various uses may demand.

Having thus described my invention, What I claim and desire to secure by Letters Patent is A device of the character described, comprising a rectangular shaped casing a series of superposed staggered plates mounted in said casing and forming a plurality of connected zigzag passages, said casing having an inlet opening formed therein communicating with the uppermost of the passages, and a discharge opening formed therein communicating with the lowermost of the passages, means for directing exhaust gases into the uppermost passage, a tunnel connected with the uppermost passage to direct air into the passage, and a plurality of funnels connected With the other passages to direct air into the same.

LEONARD E. CLAWSON.

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