US2247121A - Vacuum cleaner - Google Patents

Description

Filed Dec. 28, 1939 June 24, 1941.

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1 Claim.

The present invention relates to vacuum cleaners of the type in which the suction fan and dirt separator are located within an enclosing casmg.

The object of my invention is to provide an improved construction and arrangement in cleaners of this type which reduces the noise of operation, and for a consideration of what I believe novel and my invention, attention is directed to the following description and the claims appended thereto.

I2 on the motor shell.

the discharge end of the casing I. ing comprises a cylindrical member the cylindrical member l6.

l8 fixed to the housing member l'l.

operation. This swirling motion of the air is removed by an annular sound absorber or reducer 25 arranged within the cap 4 around the reentrant discharge opening 5. The sound absorber comprises a plurality of layers of corrugated paper 26 providing axially extending tubular passages 21 between the corrugations. The air fiows axially through openings 28 in the disk 2i through the tubular passages 21 of the Other ma- The outer edge of the disk II fits There is accordingly no metal- The bag has a reentrant sound absorber to the discharge outlet 5. Since the tubular passages are presented transverse to In the accompanying drawing, Fig. 1 is a secthe swirling motion of the air, the air flowing tional elevation of a vacuum cleaner embodying through the tubular passages loses its rotational my invention, and Fig. 2 is a sectional view or swirling motion and, when discharged from partly broken away taken on line 2-2 of Fig. 1. the tubular passages, has a substantially straight Referring to the drawing, there is shown a line motion. The sound absorber 25 produces a vacuum cleaner having a cylindrical casing l material reduction in the noise of operation. having a cap 2 at one end provided with a cy- The noise of reduction is believed to be due to lindrical reentrant inlet opening 3 and having a the fact that the spiral or swirling motion of cap 4 at the other end provided with a cylindrical the air is removed, and also to the fact that the reentrant discharge opening 5. Within the easair flows through elongated passages of noning I is an electric motor consisting of a stametallic sound absorbent material. tionary member 6 fixed in a cup-shaped shell 1 terials than corrugated paper may be used for and a rotating member 8 journaled at one end in the sound absorber. a ball bearing 9 fixed to the shell 1 and journaled The motor is resiliently supported by rubber at the other end in a ball bearing Ii) fixed to a rings 29 and 30 clamped between a disk 3| and disk I l secured to an outwardly projecting flange an inwardly extending flange 32 on the fan hous- The end thrust of the ing member 16 by bolts 33 extending through the motor is resiliently cushioned by a spring l3 arrubber rings. ranged between the ball bearing 9 and its hous- 39 in a recess 38 in the rubber ring 30 and is clamped ing. Locked on the motor shaft are fans It between the rubber rings 29 and 3i] to resiliently and I5 which discharge to a fan housing within support the motor. The outer edge of the motor The fan housshell flange I2 rests against the inner edge of the It telerubber ring 29. scoped within the discharge end of the casing l 35 to-metal contact between the motor and the fan and a cup-shaped member ll telescoped within housing which would result in the transmission The fan I4 disof noise. charges peripherally to the fan housing member The air drawn through the inlet opening 3 is I6 and the air discharged therefrom flows to the filtered through a cylindrical bag 35 clamped at inlet of the fan I5 through straightening vanes its open end to a metal ring 36 having an out- The wardly extending flange 31 carrying a sealing straightening vanes I8 remove the rotational or ring 38 which is clamped between a bead 39 on swirling motion of the air discharged from the the cap 2 and a shoulder it at the inlet end of fan It. The fan l5 discharges peripherally to the casing. The bag extends inwardly around an annular passage surrounding the fan prothe motor and at its inner end is provided with vided by the axially extending walls ll! of the fan a spacing ring All which keeps the bag out of conhousing member ii and by axially extending tact with the motor. walls 20 of a disk 2! which forms the outer end portion 42 extending from the ring M toward wall of the fan housing. The parts l6, l1, and 2! the inlet opening 3 and held in a central position of the fan housing are provided with outwardly extending flanges 22 which are clamped between a bead 23 on the cap 4 and a shoulder 3 at the end of the casing l. The air discharged from the fan 15 has a rotational or swirling motion which unless removed would increase'the noise of by a projection 43 fixed to the motor shell I. The air passing through the bag flows through openings 44 in the motor shell 1 through the motor and through openings &5 in the disk H and through an opening it in the disk 3| to the inlet of the fan It.

In the use of the cleaner a flexible hose provided with a suitable suction nozzle is connected to the inlet opening 3. The dirt laden air drawn through the suction nozzle is filtered through the bag 35, and the clean air is discharged through the discharge opening 5; When the cleaner is used as a blower, the flexible hose is removed from the inlet opening 3 and connected to the discharge opening 5.

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

In combination, a centrifugal fan impeller, a casing therefor providing an annular passage around the impeller to which air is discharged from the impeller with a swirling motion about the axis of the impeller, an end wall for the easing having axial discharge openings from said annular passage, a cap enclosing said end wall and having an outlet therein, and an annulus of corrugated material between said cap and said end wall having elongated tubular passages presented to said discharge openings transversely to the swirling air for conducting air to the outlet.

STEPHEN FOLDES.

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