Upright vacuum cleaner

Details Upright vacuum cleaner Upright vacuum cleaner

1981-12-02

1984-05-08

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15373, 15390, A47L 534

Patent

active

044465955

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to an upright vacuum cleaner having a rotatable brush housed in a suction chamber in a floor nozzle.


TECHNOLOGICAL BACKGROUND

Upright vacuum cleaners are designed primarily for cleaning rugs and carpets, and generally include a rotatable brush housed in a suction chamber in a floor nozzle for scraping up and drawing in dust particles from deep inside the pile. Although the upright vacuum cleaners are useful for cleaning the rugs and carpets, they are not suitable for thorough cleaning of uncarpeted floors since the rotatable brush tends to damage the floor as well as cause dust to fly away from the brush on the floor.
Devices are known to eliminate the above problems.
One such devices includes a V belt extending under tension between the shaft of a motor and the pulley of a rotatable brush, the pulley having a V-shaped groove variable in width for receiving the V belt. When the width of the V-shaped groove is reduced, the force with which the V belt is pressed against the surface of the groove is increased to the point where rotative power is transmitted from the motor to the rotatable brush. Conversely, when the groove width is increased, the V belt slips in the groove to prevent the brush from rotating. This prior art device requires a complicated mechanism for adjusting the groove width in the pulley, and further requires an intermediate pulley for constantly tensioning the V belt, resulting in an increased cost of the vacuum cleaner. The proposed attempt is particularly disadvantageous in that, when the rotatable brush is at rest, the V belt slips in the pulley groove and becomes much less durable due to heat generated by friction between the V belt and the groove surface.
According to another proposed expedient, the pulley around which a belt is looped is operatively coupled to the rotatable brush through a magnetic clutch. The rotatable brush, however, cannot be completely stopped due to the influence of magnetic flux even when the magnetic clutch is disconnected. To cope with this problem, a special brake mechanism is required to brake the rotary brush, an arrangement which makes the vacuum cleaner disadvantageous from the standpoint of construction and cost of manufacture.


DISCLOSURE OF THE INVENTION

According to the present invention, an idle pulley is mounted adjacent to and in juxtaposed relation to a drive pulley coupled directly to a rotatable brush, and a flat belt is selectively shiftable to one of the pulleys for rotating or stopping the rotatable brush.
An embodiment of the present invention will now be described with reference to the accompanying drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an upright vacuum cleaner;
FIG. 2 is a partly cut away side elevational view of the upright vacuum cleaner;
FIG. 3 is a bottom view of the upright vacuum cleaner with a lower case member of a floor nozzle being removed;
FIG. 4 is a cross-sectional view taken along line A--A' of FIG. 2;
FIG. 5 is a cross-sectional view taken along line B--B' of FIG. 2; and
FIG. 6 is a cross-sectional view taken along line C--C' of FIG. 2.


DESCRIPTION OF THE PREFERRED EMBODIMENTS

A main body 1 has on a bottom thereof rollers 2 and a suction fan motor 3 in a lower portion thereof. A floor nozzle 4 is pivotably mounted on a lower portion of body 1. A handle 5 projects upwardly from body 1 and a dust collector case 6 is removably attached to a front face of the main body. Dust-laden air is forced to flow through floor nozzle 4 into dust collector case 6. Dust is filtered by a dust collector (filter) disposed at an opening of case 6, and purified air is discharged by fan motor 3 out of a discharge port 7. Dust collected in dust collector case 6 can easily be disposed of by removing the dust collector case from the main body, taking the dust collector off the case, and opening a lower portion of the dust collector.
Floor nozzle 4 comprises upper and lower case members shaped to sandwich the lower portion of main body 1. Nozzle 4 i

REFERENCES:
patent: 1435477 (1922-11-01), Karle
patent: 2682680 (1954-06-01), Trimble
patent: 2682681 (1954-06-01), Balluff
patent: 4014068 (1977-03-01), Payne et al.

Affiliated with

Also associated with

Rating

Upright vacuum cleaner does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Upright vacuum cleaner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upright vacuum cleaner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1595021