US 2236265 A
Description (OCR text may contain errors)
March 25, 1941.
E. o. H. HANSSON ETAL VACUUM CLEANER Filed Sept. 19, 1938 H 4 w 1. 9 75 .b H 1 12 2 2 M 0 x 9 4 2 B 6 0 4 4w 1 0 2 3 2 3. a w I m 3 2 4 2 a 2 6 2 2 7 3 Z INVENTCRS.
- 1 non-metallic material.
Patented Mar. 25, 1941 UNITED STATES VACUUM CLEANER Erik Oskar Helge Hansson and Axel Albert Forsberg, Stockholm, Sweden, assignors to Electrolux Corporation, New York, N. Y., a corporation of Delaware Application September 1 9, 1938, Serial No. 230,606
In Sweden October 20,1937 3 Claims. (Cl. 230-417) This invention relates to vacuum cleaners and more particularly to means for supporting a motor and fan in a vacuum cleaner casing.
In vacuum cleaners of the inside bag type, a 5 motor and fan unit is usually mounted within the vacuum cleaner casing on a horizontal axis. It is desirable to provide a resilient support for the motor and fan to reduce the transmission of noise and vibration to the outer vacuum cleaner casing, 7
In accordance with this invention the motor and fan are resiliently supported in a vacuum cleaner casing by a single vertical wall. It is also contemplated forming the supporting wall of What we consider to be novel and our invention may be better understood by reference to the following specification and appended claims when considered in connection with the accompanying drawing, in which Fig. 1. is a detail sectional view of a portion of a vacuum cleaner, and
. Fig. 2 is a detail sectional view of a portion of the supporting wall.
Referring to the drawing, It) indicates a vacuum cleaner casing with an end housing having an outlet opening l2. A dust bag I3 is mounted adjacent the inlet end (not shown) of the casing and a replaceable filter I4 is located in the housing adjacent the outlet opening l2. A ring I5 is secured to casing l0 and is provided with an inwardly extending flange l6. Ring l5 carries end housing A vertical wall H of non-metallic material is secured to flange Ii of ring l5 by a plurality of screws IE, only one of which is shown. Wall I1 is provided with openings l9.
A motor is supported wholly by wall l1. An annular ring 2| is secured in spaced relation 40 to wall H by bolts 22and spacer sleeves 23. Motor 20 is resiliently mounted between wall l1 and ring 2| by conically shaped spiral springs 24. Three springs 24 are secured to each end of motor 20, only one of which is shown at each end. It may be found desirable in some cases to use a greater number of springs 24. The small ends of springs 24 are secured to the motor and the .large ends seated in'recesses 25 in the wall l1 and recesses 26 in annular ring 2|. A'centrifugal fan 21 is secured to the shaft 28 of motor 2o. A, substantially cylindrical housing 29 surrounds fan 21 and motor 20 and abuts wall i1. Opening 30 is provided in housing 29 to permit air to enter the fan 21. A plate 3| is-secured to motor 20 and extends within a short distance from the around the motor.
housing 29. Air leaving the fan 21 enters the space between the plate 3| and housing 29 and travels inwardly toward the motor 20. Guide vanes 32 are secured to or formed integrally with ring 2|, and serve to stop the rotation of the air 5 as it moves inwardly. A'portion of the air enters openings 33 in the housing of motor 20 while the remainder of the air travels around the motor 20.
The air which enters openings 33 leaves through openings 34. To prevent the dust bag Hi from 10 sealing against the opening 30 in housing 29, a perforated bulkhead 35 is secured to the casing l0 spaced from the end of housing 29.
The wall l1, in addition to serving as a support for motor 20 and fan 21, also serves to provide 15 electrical insulation between the motor 20 and the casing Ill. The insulation of the electrical parts from'the casing I0 is completed by theprovision of pockets 36 and 31 in the wall l1 to receive an electrical switch 38, for controlling the operation of motor 20 and contact pins 39 for completing the connection to a source of electrical supply, as by means of a cord set having a connector engaging said contact pins. This discharge of air between the wall l1 and ring I5 is prevented by an annular gasket 40 secured between the wall and flange IS. A packing 4| is secured between the pocket 36 and ring l5.
In the operation of the vacuum cleaner, rotation of the fan 21 by the motor 20 draws air through the dust bag I3 which separates from the air any dirtentrained in it. The air continues through the openings in the bulkhead 35 into housing 29 through opening 30. The air passes through the fan 21. A portion of the air 35 travels through the motor 20 and the remainder The air leaves the housing 23 through the openings IS in wall- I1. cThe air passes through the'filte'r l4 which separates out bacteria and any fine dust or dirt, such as carbon 40 dust from the motor brushes. The air leaves the vacuum cleaner through the opening l2 in the end housing In the use of the vacuum cleaner, the pressure varies as the cleaning operation is performed because of the variation of the sealing of the cleaning tool against the surface being cleaned. This variation in pressure may produce pulsations which result in vibrations in the motor as the motor changes in speed with the change in load imposed upon it. These vibrations it transmitted to the casing l0 may vibrate the casing and re- 7 v sult in an audible noise.' By resiliently supporting the motor 20 and fan-21 within the housing 23 and securing the complete assembly to a wall of non-metallic material, the tendency of vibrations being transmitted to the casing II is greatly reduced. The danger 0! electrical sheet by contact between the electrical parts and the casing II is very greatly reduced by the supporting oi the motor 2. on the wall i1 and the mounting of the switch It and contact pins It in the pockets 36 and s1 oi the wall i! ci non-metallic material.
What we claim is:
l. A vacuum cleaner including a casing, a wall of non-metallic material secured within said casing, a housing secured to said well and extending within said casing, a' ring located within said housing and secured tosaid wall in spaced relation thereto. and a, motor-tan unit resiliently secured to said wall and said ring within said housing.
2. A vacuum cleaner including a casing, a ring secured to one end of said casing and having an ac inturn'ed flange, a wall of non-metallic material secured to said iiange and having openings, a
ring secured to said wall in spaced relationship to said wall, a motor resiliently mounted between said wall and said last-named ring, a (an carried by said motor, and a housing covering said tan and said motor and secured to said wall.
3. A vacuum cleaner including a casing; in ring secured to said casing having an inwardly extending flange, a wall of non-metallic material secured to said flange extending across said casing, having a plurality of central openings, and peripheral pockets; a housing secured to said wall extending within said casing; a motor resiliently supported on said wall within said housing; a tan carried by said motor; a switch mounted in one of the pockets of said wall; and a connector mounted in another of the pockets of said wall; whereby all oi the electrical parts of said vacuum cleaner are insulated from the casing.
ERIK OSKARHELGE HANSSON. 20
AXEL ALBERT ronsnnnc.