U.S. patent application number 12/258949 was filed with the patent office on 2009-02-26 for vacuum cleaner with wand activated conversion valve.
Invention is credited to Shannon D. Phegley, Donald E. Proffitt, II, Alan T. Pullins, Eric J. Strecrwilk.
Application Number | 20090049641 12/258949 |
Document ID | / |
Family ID | 38469062 |
Filed Date | 2009-02-26 |
United States Patent
Application |
20090049641 |
Kind Code |
A1 |
Pullins; Alan T. ; et
al. |
February 26, 2009 |
VACUUM CLEANER WITH WAND ACTIVATED CONVERSION VALVE
Abstract
A floor care apparatus includes a housing having a nozzle
assembly and a canister assembly. A suction inlet is provided on
the nozzle assembly. A dirt collection vessel, a suction generator
and a wand receiver are carried on the housing. A first air flow
pathway connects the suction inlet to the dirt collection vessel
and the suction generator. An air flow control valve includes a
valve body received in the first air flow pathway and an actuator
having at least a portion thereof extending into the wand receiver.
A cleaning wand assembly is displaceable between a first storage
position wherein a first end of the cleaning wand assembly is held
in the wand receiver engaging the actuator and opening the valve
and a second position wherein the cleaning wand assembly is
withdrawn from the wand receiver for cleaning with the cleaning
wand assembly thereby disengaging the actuator and closing the
valve. A second air flow pathway connects the cleaning wand
assembly to the first air flow pathway between the valve body and
the dirt collection vessel.
Inventors: |
Pullins; Alan T.; (Richmond,
KY) ; Phegley; Shannon D.; (Danville, KY) ;
Proffitt, II; Donald E.; (Richmond, KY) ; Strecrwilk;
Eric J.; (Perryville, KY) |
Correspondence
Address: |
KING & SCHICKLI, PLLC
247 NORTH BROADWAY
LEXINGTON
KY
40507
US
|
Family ID: |
38469062 |
Appl. No.: |
12/258949 |
Filed: |
October 27, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
11683485 |
Mar 8, 2007 |
|
|
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12258949 |
|
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60780212 |
Mar 8, 2006 |
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Current U.S.
Class: |
15/323 |
Current CPC
Class: |
A47L 5/32 20130101 |
Class at
Publication: |
15/323 |
International
Class: |
A47L 9/00 20060101
A47L009/00 |
Claims
1. A floor care apparatus comprising: a housing including a nozzle
assembly including a suction inlet and a canister assembly
connected to said nozzle assembly; a dirt collection vessel carried
on said housing; a suction generator carried on said housing; a
first air flow pathway connecting said suction inlet to said dirt
collection vessel and said suction generator; a wand receiver
carried on said housing; an air flow control valve having a valve
body received in said first air flow pathway and an actuator having
at least a portion thereof extending into said wand receiver; a
cleaning wand assembly displaceable between a first storage
position wherein a first end of said cleaning wand assembly is held
in said wand receiver engaging said actuator and opening said valve
and a second position wherein said cleaning wand assembly is
withdrawn from said wand receiver for cleaning with said cleaning
wand assembly thereby disengaging said actuator and closing said
valve; and a second air flow pathway connecting said cleaning wand
assembly to said first air flow pathway between said valve body and
said dirt collection vessel; said floor care apparatus being
characterized by said cleaning wand assembly including a flexible
hose and first and second telescoping sections.
2. The floor care apparatus of claim 1 wherein said actuator
includes a plug for sealing and closing an open end of said
cleaning wand assembly when said cleaning wand assembly is in said
first position.
3. The floor care apparatus of claim 2, further including a spring
connected to said flow control valve and biasing said flow control
valve into a normally closed position.
4. The floor care apparatus of claim 3, wherein said flow control
valve includes a pivot shaft and said valve body and said actuator
pivot about a pivot axis defined by said pivot shaft.
5. The floor care apparatus of claim 1, further including a spring
connected to said flow control valve and biasing said flow control
valve into a normally closed position.
6. The floor care apparatus of claim 5, wherein said flow control
valve includes a pivot shaft and said valve body and said actuator
pivot about a pivot axis defined by said pivot shaft.
7. The floor care apparatus of claim 1, wherein said dirt
collection vessel is a filter bag.
8. The floor care apparatus of claim 1, wherein said dirt
collection vessel is a dirt cup.
9. The floor care apparatus of claim 8, wherein said dirt cup
includes a cylindrically shaped dirt collection chamber, a
tangentially directed inlet and an axially directed outlet.
10. The floor care apparatus of claim 9, further including a
primary filter in said dirt cup upstream from said axial
outlet.
11. The floor care apparatus of claim 10, further including a
secondary filter in said first air flow pathway between said dirt
cup and said suction generator.
12. The floor care apparatus of claim 11, further including a final
filter in said first air flow pathway downstream from said suction
generator.
13. The floor care apparatus of claim 12, further including at
least one rotary agitator carried by said nozzle assembly adjacent
said suction inlet.
14. The floor care apparatus of claim 1, further including at least
one rotary agitator carried by said nozzle assembly adjacent said
suction inlet.
15. The floor care apparatus of claim 1, wherein said canister
assembly is pivotally connected to said nozzle assembly.
16. The floor care apparatus of claim 7, wherein said cleaning wand
assembly includes a control handle.
Description
[0001] This application is a continuation of prior U.S. patent
application Ser. No. 11/683,485 filed Mar. 8, 2007 which claims the
benefit of U.S. Provisional Patent Application Ser. No. 60/780,212
filed on 8 Mar. 2006.
TECHNICAL FIELD
[0002] The present invention relates generally to the floor care
equipment field and, more particularly, to a floor care apparatus
incorporating a wand activated flow control valve.
BACKGROUND OF THE INVENTION
[0003] Upright vacuum cleaners and extractors have become
increasingly popular over recent years. Both floor care apparatus
generally incorporate a nozzle assembly that rides on wheels over
the floor surface to be cleaned. A canister assembly includes an
operating handle that is manipulated by an operator to move the
floor care apparatus to and fro across the floor. The canister
assembly also includes a dirt collector that traps dirt and debris
while substantially clean air is exhausted by an electrically
operated fan that is driven by an onboard motor. It is this fan and
motor arrangement that generates the drop in air pressure necessary
to provide the desired cleaning action.
[0004] Many upright vacuum cleaners and extractors also provide a
cleaning wand that is manipulated by the hand and used to clean
areas typically not reachable or generally regarded as cleanable
with the suction inlet of the nozzle assembly. Such apparatus are
also equipped with multiple position valves that allow the operator
to convert the apparatus between floor cleaning through the suction
inlet of the nozzle assembly and special task cleaning through the
inlet opening of the wand. Such valves must be able to seal off
either the suction inlet or the inlet opening.
SUMMARY OF THE INVENTION
[0005] In accordance with the purposes of the present invention as
described herein, an improved floor care apparatus is provided. The
floor care apparatus comprises a housing including a nozzle
assembly carrying a suction inlet and a canister assembly connected
to the nozzle assembly. The apparatus further includes a dirt
collection vessel and a suction generator that are both carried on
the housing. In addition, a first air flow pathway connects the
suction inlet to the dirt collection vessel and the suction
generator. Further, a wand receiver is carried on the housing.
[0006] In addition the floor care apparatus includes an air flow
control valve. The air flow control valve has a valve body received
in the first air flow pathway and an actuator having at least a
portion thereof extending into the wand receiver. Still further,
the apparatus includes a cleaning wand assembly that is
displaceable between a first or storage position wherein a first
end of the cleaning wand assembly is held in the wand receiver
engaging the actuator and opening the valve and a second position
wherein the cleaning wand assembly is withdrawn from the wand
receiver for cleaning with the cleaning wand assembly thereby
disengaging the actuator and closing the valve. In addition, the
apparatus includes a second air flow pathway connecting the
cleaning wand assembly to the first air flow pathway between the
valve body and the dirt collection vessel.
[0007] In accordance with additional aspects of the invention, the
actuator includes a plug for sealing and closing an open end of the
cleaning wand assembly when the cleaning wand assembly is in the
first position. Further, the apparatus includes a spring that is
connected to the flow control valve. The spring biases the flow
control valve into a normally closed position. In addition, the
flow control valve includes a pivot shaft. The valve body and the
actuator pivot about a pivot axis defined by this pivot shaft.
[0008] In accordance with additional aspects of the invention, the
dirt collection vessel may take a number of forms. In one
embodiment the dirt collection vessel is a filter bag such as a
standard vacuum cleaner bag. In another possible embodiment the
dirt collection vessel takes the form of a dirt cup. That dirt cup
may include a cylindrically shaped dirt collection chamber, a
tangentially directed inlet and an axially directed outlet. Such a
construction allows for cyclonic air flow and the cleaning benefits
provided by such air flow that are well known in the art. Further,
a primary filter may be provided in the dirt cup upstream from the
axial outlet.
[0009] In addition, the apparatus may include a secondary filter in
the first air flow pathway between the dirt cup and the suction
generator. Further, the apparatus may include a final filter in the
first air flow pathway downstream from the suction generator. Such
a final filter removes any remaining contaminants in the air stream
before the air stream is returned to the environment.
[0010] In accordance with yet additional aspects of the invention
the apparatus may include at least one rotary agitator carried by
the nozzle assembly adjacent the suction inlet. Further, the
canister assembly may be pivotally connected to the nozzle assembly
in the manner of a standard upright vacuum cleaner.
[0011] The cleaning wand assembly of the floor care apparatus
typically includes a flexible hose. Further, the cleaning wand
assembly may include first and second telescoping sections so that
the wand may be lengthened or shortened as desired by the user.
Finally, the cleaning wand assembly may also include a control
handle for manipulating the wand assembly or the entire apparatus
across the floor when the wand assembly is mounted in the wand
receiver.
[0012] In the following description there is shown and described
one possible embodiment of the invention, simply by way of
illustration of one 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.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings incorporated in and forming a part
of this specification illustrates several aspects of the present
invention, and together with the description serves to explain
certain principles of the invention. In the drawings:
[0014] FIGS. 1a and 1b are respective front and rear perspective
views of a floor care apparatus, in this instance an upright vacuum
cleaner, constructed in accordance with the teachings of the
present invention;
[0015] FIG. 2 is a detailed partially exploded perspective view
illustrating the rear of the canister assembly including a portion
of the first air flow pathway, the cleaning wand assembly and the
flow control valve;
[0016] FIG. 3 is a detailed rear elevational view showing how the
flow control valve and biasing spring are mounted in the canister
assembly to allow for pivoting movement about the pivot shaft of
the flow control valve;
[0017] FIG. 4a is a detailed cross sectional view illustrating the
cleaning wand assembly in the first position, received in the wand
receiver and fully seated on the actuator;
[0018] FIG. 4b is a cross sectional view illustrating the position
of the valve body in the first air pathway when the cleaning wand
assembly is in the first position as illustrated in FIG. 4a;
[0019] FIG. 5a is a cross sectional view similar to FIG. 4a but
illustrating the wand cleaning assembly in the second position as
it is withdrawn from the fully seated position in the wand
receiver;
[0020] FIG. 5b is a cross sectional view similar to FIG. 4b but
illustrating the position of the valve body in the first air flow
pathway when the cleaning wand assembly is in the second position
withdrawn from the wand receiver as illustrated in FIG. 5a;
[0021] FIG. 6 is a schematical representation of a dirt cup
providing for cyclonic airflow;
[0022] FIG. 7 is a schematical air flow diagram for the vacuum
cleaner of the present invention; and
[0023] FIG. 8 is a partially exploded, perspective view
illustrating the latch mechanism for holding the cleaning wand
assembly in the fully seated position on the canister assembly.
[0024] Reference will now be made in detail to the present
invention, an example of which is illustrated in the accompanying
drawings.
DETAILED DESCRIPTION OF THE INVENTION
[0025] Reference is now made to FIGS. 1 and 1a showing a floor care
apparatus 10 of the present invention. As illustrated, that
apparatus 10 is an upright vacuum cleaner. It should be appreciated
that while a specific upright vacuum cleaner 10 is illustrated,
embodiments of the present invention also include different upright
vacuum cleaners and extractors constructed in accordance with the
teachings of the present invention.
[0026] The upright vacuum cleaner 10 includes a housing, generally
designated by reference numeral 12, comprising a nozzle assembly 14
and a canister assembly 16. The nozzle assembly 14 includes a
suction inlet 18. The nozzle assembly may also carry a rotary
agitator 20 adjacent the suction inlet 18. The rotary agitator
includes cleaning elements such as brushes, bristle tufts, heater
bars or the like. As the rotary agitator 20 rotates, the cleaning
elements 21 engage the nap of an underlying rug or carpet and serve
to sweep dirt and debris into the suction inlet 18 in a manner well
known in the art. The canister assembly 16 carries a dirt
collection vessel, generally designated by reference numeral 22,
and a suction generator 24.
[0027] The dirt collection vessel 22 may take the form of a filter
bag such as a standard vacuum cleaner bag, which traps dirt and
debris but includes pores to allow the passage of air through the
bag. Alternatively, the dirt collection vessel 22 may take the form
of a dirt cup 100 as illustrated in FIGS. 1 and 6. That dirt cup
100 may include a cylindrical dirt collection chamber 102, a
tangentially directed inlet 104 and an axially directed outlet 106
in order to provide for cyclonic air flow and the cleaning benefits
associated with that air flow that are well known in the art. If
desired, a primary filter 108 may be provided in that dirt cup 100
over the axially directed outlet 106.
[0028] As best illustrated in FIG. 7, a first air flow pathway 26
connects and provides fluid communication between the suction inlet
18, the dirt collection vessel 22 and the suction generator 24. A
secondary filter 28 may be provided in the first air flow pathway
26 between the dirt collection vessel 22 and the suction generator
24. In addition, a final filter 30, such as a HEPA filter, may be
provided in the first air flow pathway 26 downstream from the
suction generator 24. The final filter 30 cleans any remaining dirt
and debris from the air stream passing through the vacuum cleaner
10 before that air stream is returned to the environment. This
includes any carbon particles that might have been picked up in the
air stream after it passes over the motor of the suction generator
24 in order to provide cooling.
[0029] A cleaning wand assembly, generally designated by reference
numeral 32 is carried on the housing 12 of the vacuum cleaner. As
illustrated in FIGS. 1, 1a, 2, 4a and 7, the cleaning wand assembly
32 includes two telescoping tubular sections 34, 36 and a
cooperating latching mechanism 38 that allows one to lengthen or
shorten the wand assembly 32 as desired. The telescoping wand
assembly 32 may be constructed similar to that illustrated in U.S.
Pat. No. 6,148,474 to Ohara et al, the full disclosure of which is
incorporated herein by reference. The wand assembly 32 also
includes a control handle 40 that may be equipped with an on/off
switch 42 and any other controls switching for the vacuum cleaner
10 as desired. A flexible hose 46 connects the handle end of the
cleaning wand assembly 32 to a second air flow pathway 48 carried
on the housing 12 which is connected to and provides fluid
communication with the first air flow pathway 26 between the dirt
collection vessel 22 and a flow control valve generally designated
by reference numeral 50.
[0030] As best illustrated in FIGS. 2 and 3, the flow control valve
50 include a pivot shaft 52 that carries a valve body 54 and an
actuator 56. The actuator 56 carries a sealing ring 58 that is
sized and shaped to plug the open or suction end 44 of the cleaning
wand assembly 32 (see FIG. 4a) when the cleaning wand assembly 32
is received in the wand receiver 60 carried on the housing 12 and
fully seated on the actuator 56 of the flow control valve 50. This
will be described in greater detail below.
[0031] As best illustrated in FIG. 3, the flow control valve 50 is
mounted for pivoting movement with respect to the rear shell 62 of
the canister assembly 16. More specifically, the first and second
ends 64, 66 of the pivot shaft 52 are received in cooperating
grooves 68, 70 provided on the rear shell 62 while an intermediate
section 72 of the pivot shaft between the valve body 54 and
actuator 56 is received in the slot 74 provided on the rear shell
62.
[0032] The flow control valve 50 is biased into a normally closed
position by means of a leaf-spring 76 having a first end received
in a notch or groove 78 on the underside of the actuator 56
opposite the sealing ring 58. The opposite end of the leaf-spring
76 engages the bottom wall 80 of the wand receiver 60 formed in the
rear shell 62. A cover 82 may be secured to the rear shell 62 by
fasteners such as screws (not shown). A keeper lug 83 is carried on
the cover 82. The keeper lug 83 includes a channel 84 that receives
the pivot shaft 72 and functions to hold the pivot shaft 72 in
place in the slot 74. The cover 82 may be removed to provide access
to the flow control valve 50, the first air flow pathway 26 and the
wand receiver 60 for service if needed.
[0033] During normal upright vacuum cleaner operation, the cleaning
wand assembly 32 is received in the wand receiver 60 on the rear of
the canister assembly 16. In this first position, the suction end
44 of the cleaning wand assembly 32 is fully seated on the actuator
56 so that the sealing ring 58 completely closes the suction end to
prevent air flow through the wand assembly (see FIG. 4a).
[0034] The cleaning wand assembly 32 is secured in the first
position by means of a locking mechanism including a spring loaded
latch 120 carried on the canister housing 16. When the wand
assembly 32 is fully seated in the wand receiver 60, the latch 120
is biased into engagement with the latching slot 122 on the wand
assembly 32 thereby securing the wand assembly. When one wishes to
remove the wand assembly 32 from the canister housing 16 for
specialty cleaning, one depresses the actuator 124. This action
releases the latch 120 from the slot 122 thereby freeing the wand
assembly 32 for removal or withdrawal from the wand receiver
60.
[0035] When the cleaning wand assembly 32 is in the first position
as illustrated in FIG. 4a, the valve body 54 is pivoted into the
cavity 84 formed in the first airflow pathway 26 so that the first
air flow pathway is fully open. The valve body 54 engages the wall
of the cavity 84 so as to prevent dirt and debris from entering the
cavity (note end 55 of valve body 54 engaging the wall at point
57). Thus, when the cleaning wand assembly 32 is in the first
position, the control handle 40 of the cleaning wand assembly 32
may be used to manipulate the vacuum cleaner back and forth across
the floor. Dirt and debris drawn into the suction inlet 18 flows
freely through the first air flow pathway 26 past the flow control
valve 50 into the dirt collection vessel 22. Dirt and debris are
collected in the dirt collection vessel 22 before the air stream is
then drawn through the suction generator 24 and returned to the
environment.
[0036] When the operator desires to perform a specialty cleaning
function using the cleaning wand assembly 32, the operator
depresses the actuator 124 to release the latch 120 from the
latching slot 122 as described above. The cleaning wand assembly 32
is then withdrawn from the wand receiver 60. As the cleaning wand
assembly 32 is being withdrawn, the suction end 44 thereof becomes
unseated from the actuator 56. The leaf-spring 76 then functions to
bias the flow control valve 50 to its normally closed position (see
FIGS. 5a and 5b). When this occurs, the valve body 54 extends
across and fully closes the first air flow pathway 26 leading to
the suction inlet 18.
[0037] When the suction end 44 of the cleaning wand assembly 32 is
removed from the sealing ring 58 of the actuator 56, air is drawn
by the suction generator 24 through the cleaning wand assembly 32,
the second air flow pathway 48, and the first air flow pathway 26
upstream of the valve body 54 into the dirt collection vessel 22.
Thus, dirt and debris drawn into the vacuum cleaner 10 through the
cleaning wand assembly 32 is trapped in the dirt collection vessel
22 before the air stream is drawn through the suction generator 24
and returned to the environment (see also FIG. 7).
[0038] The foregoing description of the preferred embodiment of
this 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. 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.
* * * * *