US2422860A - Vacuum cleaner - Google Patents

Description

.1m 424, 1947. A. w. SEYmED' 2,422,860

VACUUM CLEANER Filed March 7, 1945 Patented June 2,4, if, -i

t 4VACUUM CLEANER w Arthur` Seyfried, Racine, Wis., assgnor to Scovillf Manufacturing Company, Waterbury,

Conn., acorporationof Connecticut lqnppucationimarch 7. 1945, serialNo. 581,4231.,

g l comms. (c1. 23o-55) Ihlsinvention relatestoftank type vacuum leanersand. particularly-to Vmeans located beylavee'-ri'the fan and-motor units for controlling air .l Vcurrents `leavingv the` fan and directing them k Aradially inwardly andv then vaxially through Vthe center of the motora for the purpose of mainy taininglow armature temperature in the motor.

My inventicxipcornprises va compact, integrally castunitgconsisting'offa baille platefa bearing support jajridfa plurality of vanes 'on-the `baille plate,- located between the fan and motor units,

the plane of the line 2 of Fig. 1, looking in the direction indicated by the arrows.

and provided with means for `connecting the castingto-themotor housing and thereby also connecting part of the fan motor housing. l

The vanes employed in my 'invention are A10- cated` on that `face ofthe baillelplate adjacent housing to the said# ".Fig. 3 is a fragmentary transverse sectional view taken in the plane of the line 3-3 ot Fig. 1, looking in the direction indicated by the arrows.

The cleaner housing comprises a cylindrical body |0 having an offset portion `I| of decreased diameter whereby a circumferential shoulder l2 is formed inwardly of thee'ndfof the body IU. The end is defined by aformcd iiange I3 extending circurnferentially ofgfthe body. vAt the end of the body@` Illfisy anfouter vend bell 'or hood Ul andan innerbell orcap`|5g provided with openingsA i6; Thecap |,5"has`a member I1 arranged to abutwtheilange I3 and is Welded thereto. y The center ofthe outer hood I is open; the

the motor, and said vanes are radially disposed and straight beginning at the central bearing support for a distance constituting about twothirds oi?` their length, the Aremaining one-third 0I said vanes being vcur'ved'and terminating near the peripheral edge of the baille plate. .l

Experiments have proven that vanes, regardless of whether they are straight or curved, with- Y out a baille plate between thefan` and said vanes,

do not serveto direct the air currentsas re,-v

quired for cooling themotor. M Further, these experiments have shown that straight vanes radiating from the 'axial center, and vmounted on `a Vbaille plate, have the eilect of abruptly stopping the rotational direction of the airleaving the fans and directing the air through the center of the motor. producing a higher vacuum and gradually changing the direction of the air leaving the fans. By using vanes curved throughout their length, the armature temperature is higher because the air is not directed through the center `ofthe motor.

By providing the baille plate with a pluralityof vanes formed as herein shown and described, said vanes extending `radially from the center vopening being deiin'ed,` by the inwardly directed flange I8'. ,The hoodf Il is removably mounted on the housing I0 byany suitable means, not shown.

Spaced radi/allyfrom the housing I0 is an inner casing/which comprlsesmembersl I8,

and 2| forfhousingl the ianv and motor units.

The pa-ts I9' and V2|) are cup shaped. The member I9 has a bowlportion 22 whichis slightly enlarged to ilt over the portion 23 of the inner cup member 20..,/Said portion 23 terminates in an annular, inwardly bent ilange 24 which engages the face 0f a ring 25 which is integral with the motor housing member 2|,' and abuts a Curved vanes have the eii'ect of l shoulder formed by the flange 26 on said inember 2|. Toward the exhaust end of the cleaner, the housing member 2| is connected by straps 21 to a concentric internally screw threaded memand ending in a curved portion near the peripheral edge of the baffle plate. I obtain the adg vantageous results of both the straight andthe curved vanes not heretofore obtained' byany other form of` vane nor by either straight or curved vanes. l i i y,

In that embodiment of the invention which I have chosen to illustrate in the drawings:

Fig. 1lv is a longitudinal vertical sectional view of part of a tank typevacuum cleaner, namely: that 'part comprising the fan and motor units and the exhaust end of the housing.

Fig. 2 is aitransverse sectional view takenrin The fan and motor housing comprising theA aforementioned partsl, 20 and 2|, together with the parts 21 and 28, are resiliently mounted in the outer casing I0 by means of a resilient ring '29 which engages the portion 23 of the housing 20 and abuts the inner surface of the shoulder I2 of the casing I0. The' motor-fan unit as a whole is drawn toward the exhaust end of the housing by means of the headed screw 30 which is screwed into the member 28 and bears on the plate 3| andresilient collar 32, the latter bearing on the flat end portion 33 of the hood 5, thus causing the unit to bear against the resilient ring 29.

The motor is indicated as a whole at 34 and its shaft at 35. The shaft 35 is mounted in bearings 36 and 3l, the latter being supported in the member 28. The fan shaft 38 is integral with the motor shaft 35 and is rotatably journailed in .the member l.. The ian assembly, including a spacer 3l', is held on the shaft by the nut 39. Fans and 4| are separated by the stationary disc 42 and the base portion of the cup shaped member 20 to which it is connected.

The housing 20 is centrally apertured, the opening being approximately one and three quarters inches to allow the free passage of air adjacent the spacer 3l', whereas the baille plate or disc 42 is apertured very closely to the ian spacer so as to allow about l/M inch clearance.

Between the lan 4| and the motor 34 is an integrally formed casting comprising lthe concentric bearing support 43, baille plate 44 and vanes 45. The vanes 45 extend radially from the bearing support 43 for a distance constituting about two thirds of their length and then .extend in a curved direction to the circumferential edge 46 of the baille plate 44. At the inner or axial portion, the vanes 4l are approximately as wide as the thickness of the bearing support 43 and become gradually wider toward their outer edges, as shown in Fig. 1.

The baille plate 44 is formed with a plurality of sleeves 41 and is countersunk as indicated at 48 for the reception of screw threaded bolts 4l which extend through said sleeves 4l and the ring 25 on the housing member 2|, thereby rigidly connecting the baille plate 44 to said motor housing 2|. The bolts 49 also extend through the iiange 24 of the housing member 20 and thus connect that housing member to the adjacent motor housing 2|, and make a rigid unit of the tan and motor housings and their. contents.

Also formed on the baille plate 44 are two or more -sleeves 50 for the reception of screws 5| which extend through the plate 44 into the motor and hold the ileld coils in place.

The vanes 45 operate in a space located between the bafiie plate 44 on the left hand side, and the motor 34 and part 24 of the fan housing parallelswith the baille plate on the right hand side, as shown in Fig. 1. The vanes act on the air currents after they have passed the baille plate edge 4B; then the curved portions engage the air currents and gradually change the rotational. axially directed air to radially' inwardly directed currents, and ilnally the straight lportions direct said currents axially through the center of the motor and thence outwardly between the bells I4 and l to the exhaust opening.

The making of the bearing support 4l, baille plate 44 and vanes 45 in one integral casting provides an eilicient. inexpensiveand compact unit which controls the air currents leaving the fan for the purpose of maintaining .low armature temperature. The means provided for connecting the casting to the motor housing 2| also serves to connect the housing member 20 to Asaid housing 2|, thereby minimizing the number of parts required and producing a rigid and compact enclosed fan and motor unit.

The vanes 45 and their form and arrangement relatively to the baille plate 44 serve to control the air currents leaving the fan in such manner as to direct them radially inwardly toward the motor shaft and then axially through the center oi' the motor, resulting in higher eillciency and low armature temperature.

Changes may be made in details of construction without departing from the scope of my invention as set forth in the appended claims.

I claim:

1. A vacuum cleaner comprising a fan unit, a

4 motor, said ian unit and motor having a shaft mounted axially in said housings, a bearing for 'the shaft between the ian unit and motor, and

means for controlling the directions of the air currents leaving the fan, said means being an integrally formed unit comprising a bearing support for the shaft bearing, a baille plate extending radially from the bearing support, the peripheral edge of the baille plate being spaced from the fan housing and providing a passageway for air between said plate edge and the housing, and a plurality of vanes on that face of the baille plate adjacent the motor between said bearing support and the peripheral edge of the plate, said vanes engaging air currents leaving the fan after they have passed between the baille plate edge and the fan housing, and directing said currents inwardly toward the motor shaft and then axially through the motor.

2. The vacuum cleaner defined by claim 1, in which the integrally formed unit for controlling the air currents includesV a plurality of sleeve members formed on the baille plate, extending axially between the plate and the motor housing, and in which the said unit isI connected to the motor housing by screw bolts extending through the baille plate, sleeve members and said motor housing.

3.' The vacuum cleaner defined by claim l, in which the integrally formed unit for controlling the air currents includes a plurality of sleeve members formed on the baille plate, and in which said unit is located in the fan housing and is connected to the motor housing by connecting means which extend through said baille plate, sleeve members, the fan housing and said motor housing yand thereby also-connect the fan housing to the motor housing.

4. A vacuum cleaner comprising a ian unit, a motor, housings for containing said fan unit and motor, the fan housing comprising two4 cup shaped members one of which is engaged by the bowl portion of the other and its base provides a baille member between two fans, and means for controlling the directions ofthe air currents leaving the ian unit, said means being an integrally formed baille plate and vanes on that face adjacent the motor, located in the ian housing, between the fan and motor. sleeve members on the baille plate extending in axial directions to and abutting the motor housing, and means extending through the baille plate, sleeve members, one of the cup shaped members of the fan housing and said motor housing whereby the baille plate is connected to the motor housing and the fan housing and motor housing are also connected together. y 5. The vacuum cleaner deilned by claim 1, in which the motor includes conventional ileld coils vand the baille plate is provided with vopenings and screws which extend through the openings in the plate and bear against the field coils and thereby hold said -ileld coils in position.

6. A vacuum cleaner comprising a fan unit, a motor, housings for said fan unit and motor, said fan unit and motor having a shaft mounted axially in said housings, and means for controlling the directions oi the air currents leaving the fan unit, said means comprising a baille plate stationarily mounted between the fan unit and the motor, the peripheral edge of thebafile plate being spaced from the fan housing and providing a pas sageway for air between said plate edge and the housing, and a plurality of vanes on that-face of the baille plate adjacent the motor, said vanes exmotor, housings for containing said fan unit and tending radially from the axial portion of the 5 baille plate for a distance approximately twothirds. of their length and in a curved direction between said radially extending portions and the peripheral edge 0f the baille plate, said curved portions of the vanes engaging the air currents from the fan and directing them inwardly after they have passed betweenthe baille plate edge and fan housing, and said radial portions of the vanes serving to abruptly halt the rotational direction of said air currents, and to direct them axially through the center of the motor, said motor shaft having a bearing and said baille plate and vanes being integrally formed, with the axial p0rtion of the baille plate thickened and apertured to provide a support for said motor shaft bearing.

ARTHUR W. SEYFRIED.

REFERENCES CITED The following references are 0f record in the file of this patent:

Number l5 Number s UNITED STATES PATENTS Name Date Schlesinger May 23, 1916 Garman Oct. 28, 1919 Johnson Apr. 24, 1923 Stamm et a1 Dec. 11. 1923 Wahiborg Aug. 31, 1937 Cornelius Apr. 26, 1932 Carlstedt Dec. 15, 1936 Taylor Aug. 31, 1943 Clements Dec. 14, 1943 FOREIGN PATENTS Country Date Germany Oct. 9, 1935

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