US2036058A - Vacuum cleaner - Google Patents

Description

March 31, 1936. H. T. LANG 2,036,058

VACUUM CLEANER Filed Dec.. 11, 1934 2 Sheets-Sheet l RUBBER Inventor: Hen nyT Lang His Attorney.

March 31, 1936. H. T. LANG 2,036,058

' I VACUUM CLEANER Filed Dec. 11, 1934 2 Sheets-Sheet 2 Fig.5.

Ihver-Hcor: Henry T. Lang,

His Attorney.

Patented Mar. 31, 1936 VACUUM CLEANER a corporation of tllhlo Application December ii, rest, Serial No. vsaerr 6 Claims.

The present invention relates to vacuum cleaners and has for itsobject an improved simple mounting for the motor to the end that vibrations of the motor and of the fan driven thereby,

due to laclr. of dynamic balance, will not be transing a part of the mounting; Fig. 3 is a perspectivc view of the lower part of the motor casing; Fig. 4 is a perspective view of the seating ring; Fig. 5 is a plan view of'a cleaner with the motor removed; and Figs. 6 and '7 are detail views of the seating ring. Referring to Fig. l, 5 indicates the base element, or floor piece, as it is commonly termed,

of the cleaner having a suction nozzle t contalning a power driven revolving brush 1. To the right of the nozzle is a suction chamber i! having an opening a to establish free communication with the fan chamber ill. I0 indicates a curved wall which defines the peripheral wall of the fan chamber, said wall largely surrounds the fan and is in eccentric relation to the axis thereof to afford the necessary increase of crosssectional area for the air discharged by the blades of the fan. Located in chamber i0 is a multibladed fan it which is mounted on and is driven by the shaft l2 of the high speed electric motor it. On the shaft is a small pulley for driving the brush by means of a rubber belt M. The fan chamber is in free communication with the conduit it through which dust ladened air is forced by the fan into a dust bag (not shown) which may be of usual construction. The floor piece is supported by a pair of front wheels l6, of which one is shown and by a rear caster I'I comprising a pair of small wheels, of which one is shown. The-upper surface of the floor piece is machined to afford a flat seat of rather large diameter upon which rests the flange l8 of the seating ring l9 which is best illustrated in Fig. 4. A thin gasket 20 is located between the flange It so and the seat to form a dust-tight seal. The seating ring is formed of thin sheet steel by a pressing operation and is cup-shaped.- 1n the bottom of the cup is located a resilient ring 2|, as of soft rubber, of relatively large cross-sec- 55 tion so as to form an elastic or yielding support. The ring has a small shoulder 22 to receive and support themotor casing by means of an' outturned flange on the lower end thereof. A portion 23 of the ring is in erposed between the back so of the fan which carries the blades and the bot- (tJi. 239-11?) tom wall of the seating ring so as to prevent accidental metal to metal contact. So that the ring it may be retained within the seating ring i9 and in the desired angular position, it is permanently secured to the metal of the ring over 5 the major part of two of its surfaces, i. e., the bottom and the periphery. To do this, the seating ring is first plated with brass, then the ring inserted and vulcanized in place, a suitable mold being used for the purpose. The brass plating w permits of a firm bond between the parts. In order that the motor may always be mounted in its proper angular position and without dimculty, the rubber ring is provided with a notch or slot it, the latter receiving a corresponding projec- 15 tion 25 on flange it of the motor casing, as shown in Fig. 3. The flange it of the seating ring has a number of equally spaced holes to receive clamping. screws that extend through it into the floor piece or base element. 20

The under surface of flange of the motor casing rests directly on the shoulder 22 of the rubber ring, and its peripheral surface is in errgagement with the vertical wall it of the rubber ring. Thus it will be seen that the motor is held from moving downwardly or laterally by a'soft rubber mounting. To prevent upward movement of the motor as a unit, a second soft rubber ring 2%, separate from the first, is'provided which makes a snug fit with the wall or bore 21 of the ring it. Desirably the two rings make a press fit. The ring it! is seated firmly on the top surface of the motor flange Z6 and is held in that position by a thin metal disk 29 which has a downwardly extending central flange til, the latter engaging the inner wall of the ring 28 and serving as a. centralizing means, especially in assembling. As previously stated, the cupshaped supporting ring it rests on the finished top surface of the floor piece, and on top of it 40 rests the disk 29. The seating ring and disk 29 are secured to the floor piece by the screws d2, of which one is shown.

The cleaner has a finishing casing 3! which encloses the motor and is provided with openings or slots 32 through which air enters and flows upwardly and then downwardly through openings 33 in the motor casing and is discharged therefrom through one or more slots 34 into the space or chamber 35 from which it escapes through the slot 3b in the outer casing. To insure proper circulation of cooling air, a partition is located between the inlet slots 32 and the discharge slot 36, The partition comprises a pair of thin metal rings 3'! and 3B which are smaller in diameter than the adjacent portion of the wall of the outer casing and have a bore of larger diameter than the motor casing so as to avoid metal to metal contact. Between the two rings is a soft rubber ring 39, the periphery of which engages the' inner 6 wall oitheoutercasingandthewallofitsbore with the motor casing. The partition is supportedby metal spacers 40 which rest on the metaldisklfl, said parts being united by screwsll.

The outer casing is secured to the floor piece or base by numerous angularly spaced screws of which 43 is one. By taking out thue screws, the casing can be removed without disturbing the seating ring and disk since the latter are separately secured by the screws 42.

It is important to prevent fine dust from passing through the joint between the upper. edge of the wall In and the under side of the seating ring I! and accumulating in the space or chamber lll surrounding the wall. It is also important to prevent air leakages. This is accomplished as best shown in Fig. 6 by providing a thin layer 44 of soft rubber on the under side of the cup-shaped seating ring which engages the upper edge of the wall In". Said wall defines the boundary of the fan chamber and is eccentric to the axis of theian. As shown, the layer 44, Fig. 6, is located in the joint between the two metal surfaces and when the screws 42 are seated the rubber is slightly compressed. The layer of rubber 44 may be applied separately or it may be made as an integral part of the ring 2|. The better practice is .to make the ring and layer integral because it simplifies the manufacture, reducing as it does the number of operations. The metal base ring I! is pierced at two points as indicated at 45, one of which is shown in Fig. 7, so that the rubber during the molding operation flows radially through the openings and forms small pads 46 and 41 on the peripheral surface of the metal ring. A small amount or rubber may also flow over a limited area of the seating ring due to a slight distortion of the metal during the molding operation. These pads 46 and 41 as shown in Fig. 5 engage an annular wall of the floor piece at two places and thus block ofi' the space or chamber I0 at its ends. The fact i that the rubber spreads over a certain but limited area of the peripheral surface of the seating ring afi'ords additional anchoring means for the rubber ring. The seating ring l9 being above the wall III- with its flange l8 engaging the floor piece also forms a part of the chamber wall.

In assembling the parts, the seating ring is first mounted in place, then the motor and finally the metal disk 29 with the loose rubber ring 28 and the partition as a unit. The bore of the ring 28 is slightly smaller than the flange 34 on the disk 29 and is slightly stretched when mounted in place, which suiflces to hold it during assembly. After this, the outer casing is mounted in place and secured by the screws 43.

From the foregoing, it will be seen that the motor is entirely supported by soft rubber elements and that metal to metal contact is entirely avoided, thereby preventing transmission of any vibrations of the motor to the floor piece with the final result of reducing noise during operation of the cleaner. Also, the parts may be assembled with a minimum amount of labor, and the motor will always occupy its designed position.

What I claim as new and desire to secure by Letters Patent of the'United States is:

1. A vacuum cleaner having a floor piece with a seat formed thereon, a cup-shaped metal seating ring supported thereby, a resilient ring carried by the cup of the seating ring, a motor element having a flange seated on said resilient ring,

a second resilient ring engaging the flange and. also the first mentioned ring, and a metal disk secured to the floor piece for holding the second ring in engagement with the flange on the motor element and also with said wall.

2. A vacuum cleaner having a floor piece with a seat formed thereon, a cup-shaped metal seating ring supported thereby, a resilient ring carried by the seating ring, a motor having a casing with a ventilating opening, and an outturned flange seated on said ring, a finishing casing also having a ventilating opening in spaced relation to the first mentioned opening and enclosing the motor casing, a second resilient ring engaging a side face of said flange for holding the motor in position on the first mentioned resilient ring, a metal disk secured to the floor piece for holding the second resilient ring in engagement with said flange, a transverse partition located between the ventilating openings of the two casings which includes a metallic support and a resilient ring that engages the adjacent walls of both casings, and means carried by the metal disk for supporting the partition.

3. A vacuum cleaner having a floor piece with a seat formed thereon, a flanged cup-shaped seating ring supported thereby, a resilient ring permanently bonded in the bottom of the seating ring, a motor element having aflange seated on the resilient ring, a loose resilient ring located inside of and snugly fitting the bore of the first and having one end pressed against said flange, and a metal disk secured to the floor piece for holding the loose ring in a definite position.

4. A vacuum cleaner having a floor piece with a seat formed thereon, a flanged cup-shaped seating ring supported thereby, a resilient ring permanently bonded in the bottom of the seating ring and having a notch in the bore thereof, a motor element having a flange seated on the resilient ring and provided with a projection entering the notch to insure proper assembly of the motor on the floor piece, a loose resilient ring located within the bonded ring and engaging said flange, and a metal disk secured to the floor piece for pressing the loose ring against the flange of the motor element and having a means engaging one end of the loose ring to hold it in a central position.

5. A vacuum cleaner having a floor piece with a seat formed thereon, a metal seating ring supported by the seat, a soitrubber ring permanently bonded to the seating ring, a motor casing which engages and is partly supported by the bonded ring, a second soft rubber ring independent of the first which also engages the motor casing, and a means for exerting pressure on the second soft rubber ring 'to hold it in engagement with the motor casing.

6. A vacuum cleaner having a floor piece with a circular seat formed thereon and a curved wall defining the periphery of a fan chamber, a flanged metal seating ring supported by the floor piece and having spaced perforations in a wall thereof, a resilient ring carried by the seating ring having portions extending radially through the perforations thereof into engagement with a wall of the floor piece and another portion situated between a surface of the metal ring and the curved wall and acting as a dust seal, a fan in the-fan chamber, and a motor for driving the fan which is supported by the resilient ring.

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