US1743522A

US1743522A - Air cleaner

Info

Publication number: US1743522A
Application number: US68289A
Authority: US
Inventors: Arthur A Bull
Original assignee: HANDY GOVERNOR CORP
Current assignee: HANDY GOVERNOR Corp
Priority date: 1925-11-11
Filing date: 1925-11-11
Publication date: 1930-01-14
Anticipated expiration: 1947-01-14

Description

A. -A. BULL AIR CLEANER Jan. 14, 1930.

Filed/Nov. 11, 1925 INVENTOR. fl w/M96 BULL I Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE I ARTHUR A. BULL, OF DETROIT, MICHIGAN, ASSIGNOR TO HANDY GOVERNOR CORPO- RATION, OF DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAIV AIR CLEANER Application filed November .11, 1925. Serial No. 68,289.

This invention relates to air cleanersand more particularly to air cleaners for efficiently delivering purified air to carburetors for.

use with internal combustion engines.

In the past, in devices for cleaning air forv admission to carburetors it has been the general practice to separate the dust particles from the air by centrifugal action, by a sudden reversal of the direction movement of the air or a combination of the two. Many devices ofvarying structural characteristics have been utilized for so separating dust particles from the air, but all of such devices have been objectionable in that the admission of the air to the cleaner and the initial or subsequent rejection of the air column has caused a large amount of noise. Thus, regardless of the efficiency of the cleaner in separating the dust articles, the objectionable noise caused by t e entrance of the air has always been present.

The resent invention'primarily relates to means or directing air into air cleaners without causing the large amount of noise as has heretofore been present. This production of noise caused by the entrance of the air to the cleaner is reduced to a minimum by means of a simple cover structure which is adapted to be positioned at the opened end of the $9 cleaner. This cover structure may obvious- 1y be utilized advantageously with various types of cleaners, but as shown in the present application I prefer to use this cover structure in combination with a novel compact air cleaner such as is described in my prior applications Serial Nos. 729,866 and 26,860.

One of the objects of my invention con templates the provision of means positioned adjacent the air entrance of an air cleaner for forming a restricted entrance between the cover and the walls of the air cleaner for controlling the amount of air entering the air cleaner and thus reducing the noise caused by variations in pressure, swirling action and other causes.

Another object of my invention has to do with the provision of an air cleaner having an open end, means in said open end for forming an annular space in the end of the w cleaner, means in the said space for imparttioned between said dome and said shell for giving the air a swirling motion, and means adjacent the open end of said shell for re stricting the entrance of said air and "for directing the same to give it the maximum amount of centrifugal action.

Other features of my invention will be brought out as this description progresses, and will be embodied in the claims appended hereto. The various features of this invention are disclosed in the drawings wherein like reference numerals designate similar parts, and wherein;

Fig. 1 is a vertical longitudinal section of an air cleaner provided with my novel means for controlling the entrance of the air thereto.

Fig. 2 is a plan view of the structure shown in Fig. 1, being partly cut away to show the arrangement of the vanes and dome beneath the restricting cover.

Fig. 3 is a detail view of thedome and vane structure which form a part of the air cleaner which I prefer to use in combination with my novel cover.

Fig. 4 is a fragmentary detail view of the restricted opening at the base of the air cleaner wall for permitting continuous discharge of the separated dust particles.

In the drawings, the air cleaner which is shown and described in my prior applications Nos. 729,866 and 26,860, and which preferably forms a part of the present invention, comprises a conduit 1 which is adapted to be readily connected to the intake manifold or inlet of any standard carburetor. This conduit is connected with the source of vacuum supply, produced by the motor, and as shown, is preferably positioned centrally of the base of the cleaner and extends upwardly into the inside thereof. The shell of this cleaner struc- .ture which may be designated 3 is preferably integrally formed with an open ended cylindrical portion and a closed end or bottom 4 which terminates in a flange 5. This flange 5 forms a pressure fit with, or may be otherwise suitably secured to the conduit 1.

The inner portion of this bottom 4 is preferably shaped, as shown in Fig.1 to receive a hood or baflie member 6 which as shown, extends from the conduit 1 outwardly and downwardly towards the periphery of the bottom of the shell 3. This baflle 6 termiment therewith. The upper end of this rod 7 is threaded to receive a nut or lock washer 8. A dome 9, preferably shaped as shown in Fig. 1', and provided with the vanes 1.0, is

adapted to be frictionally held in a stationary position in the open end of the shell 3. The vanes 10-are preferably shaped and spirally positioned about the circumference of the dome 9, as-best shown in Fig. 3. It will be obvious that the dome 9 with its vanes 10, may be inserted in the open end of the shell 3 about the shaft 7, the outer ends of the vanes being formed to seat upon the flared end of the shell 3.

A cover 11, preferably bowl shaped, is provided with anaperture in the center thereof whereby the cover may be positioned by means of the rod 7 at the open end of the shell 3, as best shown in Fig. 1. The baseof this bowl 11 preferably seats upon the upper edge of the vanes 10, as best shown in Fig. 2, and it will be obvious that the screwing into position of the nut 8 will centrally locate and securely position the dome member 9 with its vanes 10, and the cover 11 in the open end of the shell 3. I

Due to the shape of the vanes 10 the cross sectional area of the opening at the base ofthe vanes is less than the cross sectional area at the entrance of the vanes. The base of the dome 9 may also be outwardly and downwardly flared and such outward and downward flare would also tend to decrease the cross sectional area of the opening at the base of the vanes. The bowl shaped cover 11, is therefore of such predetermined diameter that is will form an annular opening between its periphery and the upper edge of the shell 3, whereby the cross sectional area of such annular opening will be approximately equal to the cross sectional area of the open ings at the base of the vanes 10. It will be understood however, that I do not intend to limit myself to making the cross sectional area of this annular inlet equal to the ,cross sectional area of the openings at the base creation of noise, and it will be understood that such cover 11 may be of such diameter as to restrict the entrance of the air to prevent the creation of unequal pressures and of eddy currents normally created by the vanes.

In the normal operation of my air cleaner, the air entering the annular opening between the 'dome 9 and shell 3 will be given such a downward and outward swirling motion by the vanes 10, that such air will be directed past the upper edge of the conduit 1 and towards the lower outer edge of the shell 3, where the separated dust particles will be entrapped by the hood 6 and continuously discharged through the restricted openings 13, positioned circumferentially around the outer edge of the base 4. By providing a bowl shaped cover 11,"the air entering the cleaner will not only be restricted as to volume, but will also be directed towards the outer edges of the vanes 10. Thus substan tially all the air entering theannular space between the dome 9 and the shell 3, will be given a maximum centrifugal action due to the fact that such air will contact with the outer surfaces of the vanes 10.

I have shown and described my air cleaner as operatin in a vertical position. "This is the most a vantageous position for successful operation due to "the combined effect of the centrifugal action and gravity. However, my air cleaner will eifectively separate the dust particles from the air when positioned horizontally, due to the fact that the annular column of incoming air, is given a positive spiral swirling motion past the upper edge of the baflie conduit and towards the outer periphery'of the base of the shell 3.

Having thus described my invention, what I claim is:

1. An air cleaner comprising a shell having an open end, a cylindrical member of less diameter than the shell positioned centrally of said open en'd,a plurality of vanes positioned between said member and said shell for giving the air an axial and outward swirlin motion, and means ada ted to seat upon sa1d vanes for directing t e incoming air toward the outer ends of said vanes.

' 2. An air cleaner comprising a shell having an open end, a dome positioned centrally of said open end, a plurality of vanes positioned between said dome and said shell for giving the air an am'al and outward swirlin motion, and means positioned above said dome and open end of the shell for directing the incoming air towards the outer ends of said vanes. 3. A11 air cleaner comprising a shell having an open end, a cylindrical member positioned within and centrally of said open end, a plurality of vanes positioned between said member and said shell for giving the air an axial and outward swirling motion, and means positioned above the vanes for directing incoming air toward the outer ends of said vanes said means being of materially less diameter than the open end of said shell for predetermining the cross sectional area at the entrance to said vanes relative to the cross sectional area at the base of said vanes whereby the noise caused by the entrance of the air into the cleaner, is reduced to a minimum.

4:. An air cleaner comprising a shell having an open end, a 'dome positioned centrally of said open end to form an annular chamher at said open end, and a plurality of vanes positioned between said dome and shell for forming a plurality of spiral channels for the entrance of the air and a single axially sloping member above and at the open end of said shell and of materially less diameter than the open end of the shell for predeterng the cross sectional area at the entrance to said vanes relative to the cross sectional area at the base of said vanes whereby the noise caused by the entrance of the air into the cleaner is reduced to a minimum.

5. An air cleaner comprising a shell having an open end and a closed end, a conduit positioned centrally of said closedend and extending into said shell for forming a relatively deep chamber at the base of said cleaner, and stationary vanes positioned adjacent said open end for giving the incoming air an axial and outward swirling motion past the edge of said conduit and means for directing the incoming air towards the outer ends of said vanes.

In testimony whereof Ihave affixed my signature.

ARTHUR A. BULL.