US2484491A - Movable filter type suction cleaner - Google Patents

Description

Oct. TL T949. w. J. nAuG'HERTY 2,484,491

HCVABLE FILTER TYPE SUCTION CLEANER Filed July 16, 1947 2 sheets-sheet 1 FIG.

" I lsrmentor Mza/1M maa/[WW BB i nl y* Gttornegs Oct. 11, 1949. w. .1. DAUGHERTY 2,434,491

MVABLE FILTER TYPE SUCTION CLEANER Filed July 1e, 1947 2 sheets-sheet 2 l'mventor FIG. 3l y BBQ/dfn Gttomegs Patented Oct. 11, 1949 MOVABLE FILTER TYPE VSJ''I'IPI CLEAN William J .mDaulghert Cleveland, Ohio Applicatin July 1.6, 1947, Serial N0. 761,381

The present invention relates to an` improved suction cleaner. f

It is the purpose and object of the lpresent invention to provide a suction cleaner that is selfcontained and requires no bag for receiving the dirt picked up by the cleaner.

Additionally, it is the purpose and object of the invention to provide such a bagless suction cleaner which is free from excessive vibration and one in which the action of centrifugal force is not relied upon to eiect separation and collection of the dirt.

More specifically, it is the purpose and object of the invention to provide a suction cleaner in which the dirt laden air is drawn through a suction port and thence through a slowly rotating filter, the dirt retained on the filter being automatically removed and deposited in a removable dirt receiving drawer.

Further and additional objects and advantages of the invention will be made apparent as the description proceeds, which will be given in relation to the accompanying drawings forming a. part hereof and in Which:

Figure 1 is a longitudinal sectional View through the housing of the suction cleaner `showing the operative parts thereof;

Fig. 2 is a cross sectional View on the line 2,-2 of Figure 1; and

Fig. 3 is a cross sectional view on the line 3-3 of Figure 1.

The suction cleaner embraces the main housing l mounted on rollers II for ease of movement over the floor. The housing I0 is provided with a streamline upward extension I2 provided with a convenient handgrip I3 by which the entire suction cleaner can be readily picked up and carried by the operator. Additionally, the streamline upper extension I2 is constructed to receive a long handle I4, as indicated at I5, through the medium of which the suction cleaner may be pushed over the oor in conventional manner. Additionally, the streamline upper extension I2 is provided with transverse openings I6 through the medium of which a shoulder strap, not shown, may be connected to the suc? tion cleaner for ready portability of the same. The forward end of the streamline upper extension I2 provides a mounting and shield for -a light bulb I1 which casts its lightv directly on thefloor in advance of the suction cleaner.

The main body portion of the housing I0 terminates at its forward end in a suction nozzle I8 having a front wall I9 and a rear wall 20. The suction nozzle I8 extends laterally ofl the housing V4 claims. (c1. 18a-ss) Y 2 Y i and' provides an elongated slot or opening through which the dust laden air is drawn.

Coming now to the operating elements of Vthe suction cleaner, a motor supporting ring 2|`is iirmly fixed throughout a substantial part of its circumference to the inner Wall of the lmain housing I0. At suitably spaced points circumferentially of the motor supporting ring 2|, there are positioned specially formed motor mount angle irons 22, one leg of each of which is concave, as shown in Fig. 3, to thereby accurately 't' the motor casing, which is held in place by the screws 23. The motor support angle irons 22 are mounted on the motor supporting ring 2l through the medium of bolts 24, which serve not only the function of securing the motor mount angle irons 22 to the motor supporting ring 2|, but also as the support for one end of the cylindrical iilter 25. The cylindrical lter 25 is provided at the end thereof, adjacent the motor supportingring 2|, with an annular bearing ring 26 provided with a bearing raceway 2'I, in which the dust proof bearings 28, mounted on the bolts 24, are adapted to run (see Fig. 3). The bolts 24 additionally carry upon vthe bearings 28 what may be termed a labyrinth seal 29 completely encircling the filter supporting ring 26 and sealing off the dust area from the bearings 28 and the raceway An electric motor 30 is held in place within the angle irons 2'2 by the screws 23. The motor shaft 3| extends both forwardly and rearwardly of the motor. A spider support 32 is secured to the housing I0 forwardly of the motor 30 and the filter 25 and carries a ball bearing support 33 for the forwardly extending portion of the motor shaft 3|. A second spider support 34 is provided immediately rearwardly of the motor which carries a suitable ball bearing support 35 for `the rearwardly extending portion of the motor vshaft; 3|. The rear end of the motor is also anchored to the spider support 34 through the screws 36.

.The forward end of the cylindrical lter 25 is secured to a circular plate 36 supported on the forwardly extending portion 3| of the motor shaft through the medium of the ball bearing 38 similar to the bearings 33 and 35. A steadying strut 39 is secured to the main housing by screw 40 and bears against the forward side of the plate 31 when the same is rotated. Suitable anti-friction means may be provided between the strut 39 and the plate 3l. Secured to the plate 31 is a ring or sun gear 4I through the medium of which the rotating filter 25 is driven by the small gear 42 mounted onthe shaft V43 carried by the bracket 44, secured to the forward end of the mot-or casing by the screw 45. Also mounted on the shaft 43 is a pulley wheel 4S in alignment with the pulley channel 41 in the forwardly extending portion of the motor shaft 3 I. A belt 48, trained over the belt channel 4l of the motor shaft 3l and the pulley 45 affords the drive from the motor shaft through ythe pulley to the gear 42 and thence to the ring gear 4| aiiixed to the plate 31, with which the circular filter 25 is rotated. The .rear endof the circular lter '25 which, as described, is affixed to the supporting ring 25, rides freely in the bearings 28. At the extreme forward end of the motor shaft 3i, a second belt channel 49 is provided for receiving the belt 55, which is trained around A dust and dirtcrawer ei is removably received between the lower walls 5t and 59 of the housing iD. The drawer V5l is adapted to be withdrawn rearwardly of the suction cleaner to be emptied and replaced. This drawer 5l has a reasonably tight friction fit between the walls 58 and 59. The wall 58 terminates coincident with the labyrinth seal 29 and thus the space immediately below the rotating -filter 25 is open into the drawer 5l. and 6i are affixed to the inner wall ofthe housing l as indicated at 52 and t3 respectively. The free edges of these spring plates extend into close proximity of the periphery of the rotating lter '25. The spring plate t5 thus acts to seal the drawer iii from one side of the lter 25 and the plate l acts to seal the drawer lil from the opposite side of the rotating filter 35. In addition, the free edge of the plate 5i is set in `suiiiciently close juxtaposition to the periphery .of the rotating lter to act as a scraping element to free the rotating filter 25 of dust and dirt carried thereby as each successive portion of `the ,circumference of the rotating filter 25 passes the free edge of the plate @l (see Fig. 2).

When current is supplied to the motor 33, .the following actions occur. The dual fansii and 55, mounted on the rearwardly extending Dortion of the motor shaft 3i, set up suction .and draw dirt and dust laden air from the floor or carpet up through the suction nozzle lil. The release yof dirt and dust from the floor and-.carpet is facilitated by the action of the rotating brush 53,driven from the forwardly extending portion of the motor shaft rr*i through the Vbelt The dust and dirt laden air passes upwardly and about the arms of the spider B yand thence into Ythe annular space surrounding the rotatingfiiter 25 above the plates Se and 5i The air is forced `to pass through the rotating filter 25, on the outer circumference of which thedirt and dust lis collected. The dust-free air enters the interior of the rotating filter 25 and circulates around and past `the motor 35, effectively cooling the same. The dust-free air passes between vthe radiallyextending arms of the motor mount angle irons .22,v thence through the openings in the spider. support 34 where it is picked up by the blades of the dual fans .5tk and and expelled from the irear @f ithe ghousing'through the openings 55.7"'Ifhe A pair of spring pressed plates filter 25 rotates at an appropriate speed predetermined by the gear ratio between the gear 42 and ring gear 4l driven from the motor shaft 3| by the belt 38. The sealing plate 5!) is suiciently resilient and has its free edge spaced far enough from the periphery of the rotating screen 25 to permit the dirt and dust carried by the rotating filter to readily pass into the drawer 5l', whereas the plate El is so set and has its free edge sufficiently iclose to the periphery of the rotating illter screen 25, to retain 'the dust and dirt carried by the screen into the drawer 5l.

`It will be appreciated that whereas the dual fans for creating :suction are carried directly by the motor shaft and, therefore, partake of the speed -of rotation of the motor shaft, the filter is differentially driven and moves at a much slower predetermined speed.

V=Flrorn the foregoing, it will be apparent that the present invention provides a compact, unitary suction cleaner of the fbagless type -of simple and practical design and construction.

Having thus described my invention, what I claim is:

1. I-n a suction cleaner-a unitary housing, a motor having its shaft 4extending longitudinally of the housing vmounted in said housing, a plurality of .suction inducing fans carried on the motor shaft rearwardly of the motor, a rotating cylindrical filter screen rotatably carried `by vsaid moii li tor shaft and positioned between the suction end of the housing and the discharge end of the housing, and means embracing gear reduction means for driving the rotating cylindrical filter screen from the motor shaft.

2. In a suction cleaner a unitary housing, .a motor supporting ring anixed to the kinterior `oi the housing intermediate the ends thereof, amotor carried by said motor supporting ring with its shaft extending longitudinally of `said housing, supporting -webs affixed 'to said housing and positioned forwardly and Arearwardly of the motor, each of -said webs carrying a bearing support for the motor shaft, at least one suction fan mounted -on the .motor shaft rearwardly of Athe motor, a rotating cylindrical lter at least in part surrounding said motor, and means for driving said rotating cylindrical filter from said motor shaft at a lower rate of speed than the speed of the suction inducing fans.

3. In a suction cleaner a unitary housing, a motor mounted within the housing with its motor shaft extending `in opposite directions from the motor, a suction inducing fan mounted on one end of the rmotor shaft, a .cylindrical filter within the housing rotatably mounted on said motor shaft, means for removing dust and dirt from the cylindrical filter, and means including gear reduction elements actuated by said motor shaft for effecting rotation of said cylindrical lter on said motor shaft.

4. Ina suction cleaner a unitary housing, .a motor supporting ring carried .by said housing, -a motor mounted in said ring with the motor shaft thereof extending in opposite directions from the motor, at least .one suction inducing `fan Acarried atone end of the motor shaft, a rotating c ylindrical filter at least partially surrounding the motor and mounted for rotation on the motor shaft.and means for rotating said rotating lter about `the .motorshaftat a slower rate of Aspeed than the speed of `rotation `of the motor shaft. WILLIAM J, DAUGI-IERTY.

(References .on ,following page) 5 REFERENCES CITED lfgs The following references are of record in the 2:244165 111e of this patent: 2,330,621 UNITED STATES PATENTS 6 2,338,956

Number Name Date 1,561,321 Goodman Nov. 10, 1925 Number 1,631,549 Pease June 7, 1927 321,515 2,064,587 Carlstedt Dec. 15. 1936 10 Name Date Taylor Aug. 1, 1939 MaoFarland June 3, 1941 Radke Sept. 28, 1943 Meyer Jan. 11, 1944 FOREIGN PATENTS Country Date Great Britain Nov. 14, 1929

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