Patent Application
20080072397
The present invention relates generally to the floor care equipment field and, more particularly, to a floor cleaning apparatus having a nozzle assembly for cleaning a floor, a handle assembly with control handle pivotally connected to the nozzle assembly and an electrified hose for powering a separate cleaning attachment.
Upright vacuum cleaners of various shapes and designs have long been known in the art. Upright vacuum cleaners generally include a nozzle assembly having an intake opening, a handle assembly connected to the nozzle assembly, a suction generator for generating the negative pressure to draw dirt and debris into the vacuum cleaner and a dirt collection vessel in the form of a bag or cup for collecting dirt for disposal. While particularly useful and convenient for cleaning open floor areas, the dimensions of the nozzle assembly and/or the weight and structure of the overall vacuum cleaner prevent its effective use in certain applications. For example, the nozzle assembly may be too wide to fit in a narrow space between a wall and a heavy piece of furniture. Further, it should be appreciated that the nozzle assembly of the upright vacuum cleaner is not particularly adapted for cleaning the treads of a stairway, the cushions of a couch, along the top of baseboards, windowsills and draperies or for other above floor applications. Accordingly, most upright vacuum cleaners are also equipped with a flexible hose and sometimes a wand as well as one or more cleaning attachments for the hose and/or wand.
In the past, those cleaning attachments have generally included an upholstery brush and crevice tool. More recently, some upright vacuum cleaners have been equipped with a cleaning head including a rotary agitator connected to an air impeller. The airflow generated by the suction generator turns the impeller and drives the rotary agitator.
While such a design is useful for some applications, it should be appreciated that the airflow energy utilized to turn the impeller and drive the agitator is no longer available to carry entrained dirt and debris toward the dirt collection vessel of the vacuum cleaner. Accordingly, cleaning efficiency is compromised when the airflow is also used to drive a rotary agitator.
Recognizing this shortcoming, the present invention relates to an upright vacuum cleaner equipped with an electrified hose capable of powering an electric motor for driving an agitator of a cleaning tool attachment, a light or other electrical feature. Advantageously, since the rotary agitator of the cleaning tool is driven by an electric motor rather than the airflow generated by the suction generator, that entire airflow remains available to entrain dirt and debris and draw it toward the dirt collection vessel of the vacuum cleaner. Accordingly, not only is the agitator driven more powerfully and at great speeds so as to better beat dirt and debris from a surface being cleaned, but the full energy of the airstream remains available for drawing that dirt and debris to the dirt collection vessel. As a result the cleaning efficiency of the cleaning tool is greatly enhanced.
In accordance with the purposes of the present invention as described herein, an upright vacuum cleaner is provided. That upright vacuum cleaner incorporates a nozzle assembly including an intake opening and a handle assembly pivotally connected to the nozzle assembly. The upright vacuum cleaner also includes both a suction generator and a dirt collection vessel. These two structures may be carried on either the nozzle assembly or the handle assembly. Additionally, the upright vacuum cleaner includes a flexible, electrified hose that may also be carried on either the nozzle assembly or the handle assembly as desired. In one possible embodiment, that flexible, electrified hose is a stretch hose.
The invention may also include an electrified cleaning wand. Both the electrified cleaning wand (when provided) and the cooperating flexible, electrified stretch hose include three insulated electrical conductors. The hose also includes a reinforcing wire for strength and structural integrity and a collapsible wall that allows the hose to be stretched for added length when cleaning.
The upright vacuum cleaner further includes a cleaning attachment and a first connector for securing that cleaning attachment to the hose and/or wand. The cleaning attachment includes an electrical motor that receives electrical power through at least two insulated electrical conductors in the wand and the stretch hose. That electrical motor is connected to a rotary agitator carried in an intake opening in the cleaning attachment in order to drive the rotary agitator to provide more efficient and effective cleaning through the attachment than would otherwise be possible. Alternatively, the cleaning attachment may include a booster fan and the booster fan may be driven by the electrical motor in order to provide increased suction to the cleaning attachment. Additionally, the cleaning attachment may include a light that receives electrical power through the two insulated electrical conductors in the wand and the stretch hose.
In accordance with an additional aspect of the present invention a second connector may be provided for securing the wand to the stretch hose. In this embodiment the wand may be removed from the stretch hose and the hose directly connected to an attachment if desired.
In still another possible arrangement, the wand may include multiple sections. Those sections may be separate or alternatively may be telescoping in design.
The upright vacuum cleaner may also include at least one rotary agitator carried on the nozzle assembly in the intake opening. Further, the dirt collection vessel may take the form of a dirt filter bag or a dirt cup. The dirt cup may be substantially cylindrical in shape and include a tangentially directed inlet opening in order to take advantage of the cleaning action produced by cyclonic airflow if desired.
Still further, a control switch may be provided for selectively activating and deactivating the electrical motor on the cleaning attachment. That control switch may be carried on the wand or the cleaning attachment itself.
In accordance with yet another aspect of the present invention, a method is provided for increasing the cleaning versatility and performance of an upright vacuum cleaner. That method comprises equipping an upright vacuum cleaner with a flexible hose, such as a stretch hose, and a powered cleaning attachment tool that may be selectively secured to the hose and used for certain cleaning applications. That method also includes equipping the flexible stretch hose and/or a wand (if present) with electrical conductors for powering the powered cleaning attachment. In addition the method includes equipping the powered cleaning attachment with a rotary agitator and cooperating rotary agitator drive motor. Further, the method includes equipping the powered cleaning attachment with a light source so that the work area may be better illuminated so that the operator can clearly see and thereby direct the cleaning attachment to provide more effective and efficient cleaning.
In the following description there is shown and described several different embodiments of the invention, simply by way of illustration of some of the modes best suited to carry out the invention. As it will be realized, the invention is capable of other different embodiments and its several details are capable of modification in various, obvious aspects all without departing from the invention. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
The accompanying drawings incorporated herein and forming a part of the specification, illustrate several aspects of the present invention and together with the description serve to explain certain principles of the invention. In the drawings:
Reference will now be made in detail to the present preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings.
Reference is now made to
The apparatus 10 includes a nozzle assembly 12 that includes an intake opening 14. The nozzle assembly also houses a rotary agitator 16 in the intake opening 14. The rotary agitator 16 may include tufts of bristles 18 or other cleaning structures such as wipers, beater bars and brushes for brushing and beating dirt from the nap of the underlying rug or carpet being cleaned.
The apparatus 10 further includes a handle assembly, generally designated by reference numeral 20. The handle assembly 20 is pivotally connected to the nozzle assembly 12. The handle assembly 20 includes a first housing section 22, a second, mating housing section 24 and a control handle 26. A suction generator 26, including a cooperating fan and drive motor, is housed in a compartment within the handle assembly 20. Additionally, the handle assembly 20 includes a cavity 28 that receives and holds a dirt collection vessel 30. The dirt collection vessel 30 illustrated takes the form of a dirt cup. The dirt cup may include a cylindrical internal chamber and a tangentially directed inlet in order to provide cyclonic airflow and take advantage of the cleaning benefits characteristic of such airflow if desired. Alternatively, the open cavity 28 may be replaced with an enclosed compartment that receives a filter bag in a manner known in the art.
During normal floor cleaning operation, the tufts or bristles 18 on the rotary agitator 16 beat and lift dirt and debris from the nap of an underlying carpet or rug being cleaned. That dirt and debris is drawn into the intake opening 14 in the nozzle assembly 12 by mans of the negative pressure and the resulting airflow produced by the suction generator 26. Accordingly, air entrained with dirt and debris is drawn through a conduit (not shown) and delivered through the wand 42 and the hose 44 to the inlet (not shown) of the dirt collection vessel 30. Dirt and debris is trapped in the vessel 30 while substantially clean air is drawn through a filter (not shown) into the compartment housing the suction generator 26. That relatively clean air passes over the motor of the suction generator 26 to provide cooling and is then discharged through a final filter (not shown) and the exhaust port 38 into the environment.
As best illustrated in
As illustrated, the first end of the hose 44 is connected to a hose conduit or fitting 62 carried on the handle assembly 20 of the upright vacuum cleaner. A two section electrical plug or junction box 64 provides the electrical connection between the upright vacuum cleaner 10 and the electrical conductors 56, 58, 60 of the hose 44. A connector 65 at the other end of the stretch hose 44 provides secure threaded or friction fit connection with the end of the wand 42. Additional details relating to electrified stretch hoses 44 of the type incorporated into the present invention may be gleaned from reviewing various prior art references including, for example, U.S. Pat. No. 5,555,915 to Kanao.
As illustrated in
As illustrated in the partially broken away section of the drawing figure, the wand 42, like the hose 44 includes a first insulated electrical conductor 72, a second insulated electrical conductor 74 and a third insulated electrical conductor 76. A two-section junction box or plug 78, identical to the junction box 64, bridges the connector 65 and the wand section 66 to provide electrical connection between the first insulated electrical conductors 56 and 72, the second insulated electrical conductors 58 and 74, and the third insulated electrical conductor 60 and 76.
As further illustrated in
A junction box or cooperating plugs 94 provide electrical connection between the electrical conductors 72, 74, 76 of the wand 42 and the electrical leads (not shown) to the drive motor 86. Thus, it should be appreciated that the drive motor 86 receives its power from the electrical wall outlet through the electrical power cord and internal wiring and circuitry in the nozzle and handle assemblies 14, 20 of the upright vacuum cleaner, the junction box 64, the conductors 54, 56, 60 in the stretch hose 44, the junction box 78, the conductors 72, 74 and 76 in the wand 42, the junction box 94 and the electrical conductors and wire leads leading from the junction box 94 to the electric motor.
As also illustrated in
While not specifically illustrated, the drive motor 86 could also drive an auxiliary booster fan in addition to the rotary agitator 84 in order to provide additional suction at the inlet 82. Alternatively, the drive motor 86 may also simply be used to drive a booster fan instead of a rotary agitator 84 in the event such an arrangement were desired.
It should also be noted that the junction boxes 78 and 94 are identical. Further, the connector 65 will receive and hold the cleaning attachment 50. Accordingly, the electrical or powered cleaning attachment 50 may be connected directly to the electrified stretch hose 44 if desired. Accordingly, the electrified wand 42 need not be used or even provided.
In summary, numerous benefits result from employing the concepts of the present invention. In the past, rotary agitators in wand attachments for upright vacuum cleaners were all air driven by means of an impeller. While such rotary agitators may be driven at relatively high speeds to provide good scrubbing action, this is achieved at the expense of good suction power. In contrast, the powered cleaning attachment 50 of the present invention incorporates a rotary agitator that is driven by an electric motor at still higher speed and with greater power to provide still better brushing action. As an added benefit, the entire suction power of the vacuum cleaner remains available to draw dirt and debris loosened by that agitator into the vacuum cleaner. Accordingly, cleaning efficiency is greatly enhanced to a level heretofore unattainable with wand cleaning tools used on upright vacuum cleaner of previous design. Thus, the present invention represents a significant advance in the art and provides many benefits to the user.
The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. For example, as illustrated in
The embodiment was chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled. The drawings and preferred embodiments do not and are not intended to limit the ordinary meaning of the claims in their fair and broad interpretation in any way.
This application is a continuation of (1) U.S. patent application Ser. No. 10/817,561 filed on Apr. 2, 2004, which claims the benefit of U.S. Provisional Patent Application Ser. No. 60/460,700 filed on Apr. 4, 2003 and (2) U.S. patent application Ser. No. 10/870,193 filed on Jun. 17, 2004, which claims the benefit of U.S. Provisional Patent Application Ser. No. 60/479,131 filed on Jun. 17, 2003.
| Number | Date | Country | |
|---|---|---|---|
| 60460700 | Apr 2003 | US | |
| 60479131 | Jun 2003 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10817561 | Apr 2004 | US |
| Child | 11998027 | Nov 2007 | US |
| Parent | 10870193 | Jun 2004 | US |
| Child | 11998027 | Nov 2007 | US |
