U.S. patent number 3,874,023 [Application Number 05/397,149] was granted by the patent office on 1975-04-01 for resiliently mounted motor and fan arrangement for a canister cleaner or the like.
This patent grant is currently assigned to The Hoover Company. Invention is credited to Donald B. Tschudy.
United States Patent |
3,874,023 |
Tschudy |
April 1, 1975 |
Resiliently mounted motor and fan arrangement for a canister
cleaner or the like
Abstract
Canister cleaner arrangements are provided in which the motor
and fan system is resiliently mounted to suppress vibration and
noise transmission outwardly of the cleaner by the utilization of
upper and lower resilient mounts that sealingly form a "sandwich"
effect around the fan system to thereby isolate a large portion of
the noise and vibration produced from the cleaner housing and also
to act as a sealing means for the air system of the cleaner. The
upper and lower resilient mounts are situated and interrelated with
the other cleaner parts so that the overall dimensional effect is a
reduced diameter low profile cleaner having a large bag containing
volume. A novel air cooling system for the canister cleaner is also
described.
Inventors: |
Tschudy; Donald B. (Canton,
OH) |
Assignee: |
The Hoover Company (North
Canton, OH)
|
Family
ID: |
27015767 |
Appl.
No.: |
05/397,149 |
Filed: |
September 13, 1973 |
Current U.S.
Class: |
15/326; 181/207;
181/230 |
Current CPC
Class: |
A47L
9/22 (20130101); A47L 5/22 (20130101); A47L
7/009 (20130101); A47L 7/0085 (20130101) |
Current International
Class: |
A47L
7/00 (20060101); A47L 9/22 (20060101); A47L
5/22 (20060101); A47l 009/22 () |
Field of
Search: |
;15/326,412 ;181/33A
;248/22 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Hornsby; Harvey C.
Assistant Examiner: Moore; C. K.
Claims
What is claimed is:
1. A resiliently mounted motor and air moving arrangement for a
floor care appliance including;
a. a bottom pan for said floor care appliance with floor-engaging
means situated in the bottom thereof,
b. a diffuser and fan structure situated above said bottom pan,
c. first resilient means disposed between said bottom pan and said
diffuser and fan structure and supported by said bottom pan for
providing a mounting affording resiliency therebetween,
d. said motor being mounted to and above said diffuser and fan
structure and resting thereon, and
e. second resilient means mounted with said motor, said second
resilient means being disposed between the main part of the housing
and said motor for resiliently segregating the main portion of the
housing for said floor care appliance from said motor and said
diffuser and fan structure, whereby said bottom pan and said main
portion of said floor care appliance is isolated from noise and
vibration generated by said motor and said air moving
arrangement.
2. The resiliently mounted motor and air moving arrangement set out
in claim 1 wherein;
a. said first resilient means directly and abuttingly engages said
bottom pan.
3. The resiliently mounted motor and air moving arrangement set out
in claim 1 wherein;
a. said floor care appliance includes an intermediate pan disposed
immediately above said bottom pan and receiving its support from
said bottom pan, and
b. said intermediate pan abuttingly and directly engages said first
resilient means.
4. The resiliently mounted motor and air moving arrangement of
claim 1 wherein;
a. at least one of said resilient means is generally annular and
formed from a series of spaced, solid spheres of resilient
material, arranged circumferentially, and
b. said solid spheres are integrally connected together by at least
one annularly extending connecting means.
5. The resiliently mounted motor and air moving arrangement of
claim 4 wherein;
a. said annularly extending connecting means also extends generally
vertically so as to, in effect, form a thin walled cylinder and
divide each sphere into vertically attached semispheres,
b. said vertical extent of said annularly extending connecting
means terminating generally at the upper and lower terminations of
said spheres and being flat to thereby form sealing faces for
sealing said air moving arrangement.
6. The resiliently mounted motor and air moving arrangement of
claim 4 wherein;
a. said solid spheres are connected together by a second generally
annularly extending connecting means, and
b. said one and said second annularly extending connecting means
are disposed at right angles to each other so that said spheres
are, in effect, divided into quadrants, whereby said annular means,
while made of a relatively high durometer material of high
durability, exhibits a softened resiliency characteristic.
7. A canister cleaner including;
a. a bottom pan means including a floor-engaging means for support
of said cleaner,
b. a diffuser and fan means disposed above said pan means,
c. a motor means mounted with said diffuser and fan means,
d. a shell means forming an upwardly open cavity for the reception
of a replaceable dirt bag,
e. a first resilient means disposed between said diffuser and fan
means and said bottom pan for resiliently supporting said diffuser
and fan means and motor and vibrationally isolating the same from
said bottom pan, and
f. a second resilient means mounted between said motor and said
shell means for vibrationallly isolating said shell means from said
motor whereby said first and second resilient means form a sandwich
about said diffuser and fan means and motor to reduce noise
transmission through the shell means and bottom pan means to the
area in which said cleaner is used.
8. A canister cleaner as set out in claim 7 wherein;
a. said first and second resilient means are annular and of
differing diameters so that said second resilient means is inset
transversely from said first resilient means whereby
vibration-induced rocking of said diffuser and fan means and said
motor is substantially severely limited.
9. A canister cleaner as set out in claim 7 wherein;
a. said bottom pan forms the bottom of the housing for said cleaner
and said first resilient means supportedly rests substantially
immediately adjacent thereto,
b. said diffuser and fan means is supported in abutting engagement
with said first resilient means, and
c. said motor extends immediately upwardly from said diffuser and
fan means and supports said second resilient means at its lower
portions whereby said upwardly opening shell means provides a
relatively unobstructed, annular dirt bag-receiving volume between
its periphery and said motor means.
10. A canister cleaner including;
a. a relatively flat, dish-shaped bottom means for supporting said
canister cleaner,
b. an upwardly opening, generally rigid shell means for forming at
least part of a substantially unobstructed dirt bag-receiving
cavity,
c. a motor and fan means disposed on the bottom means and extending
a limited amount into said dirt bag-receiving cavity, and
d. resilient means for resiliently mounting said motor and fan
means and disposed outside and below said shell means, between said
shell means and said motor and fan means and between said bottom
means and said motor and fan means, to thereby sandwich said motor
and fan means and vibrationally isolate the same from said bottom
means and said shell means.
11. The canister cleaner of claim 10 wherein;
a. said resilient means, providing said sandwiching relationship,
sealingly maintains the integrity of at least a portion of the air
system for said canister cleaner.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to vibration suppressing, resilient mounting
arrangements and, more particularly, relates to a floor care
appliance having a resiliently and sealingly mounted fan and motor
system.
2. Description of the Prior Art
The use of resilient mounting arrangements for the isolation of
noise and the suppression of vibration are old and well known
generally; and, particularly, have been utilized in vacuum cleaners
for many years in an attempt to limit the noise produced and make
such floor care appliances more acceptable to the
housewife-user.
These resilient mounting arrangements have taken many forms through
the years from fairly complicated to relatively simplified
structures. Such structures, for example, include resilient mounts
located at opposite ends of the fan housing, resilient mounts
located at the bottom of the motor, resilient mounts intermediate
to the height of the motor, and resilient mounts at the jointure of
the motor and fan housing. All of these enumerated arrangements and
others which are known have required some design trade-off during
their development so that they suffer at least some inherent design
deficiency or lack adaptability when applied to a particularized
general style of vacuum cleaner.
More specifically, no canister vacuum cleaner resilient mounting
arrangement is known which desirably also provides a sealing
function for the fan system, and which has the resilient mounting
means disposed so as to minimize the required height and diameter
of the motor, resilient support and fan system, and which also has
the resilient mounting arrangement arranged to reduce
vibrational-caused rocking to a minimum without resort to a
maximized lateral extent of the resilient mounts or mounting.
Accordingly, it would be advantageous to provide such a mounting
and resilient suspension system since the cleaner resulting would
have obvious improved appearance, simplified design, reduced cost,
and improved performance.
Additionally, it would be advantageous to provide such a resilient
mounting arrangement since assembly effort would tend to be
minimized making manufacturing of the cleaner easier and
faster.
It would be further advantageous to provide such a resilient
mounting arrangement since a larger bag volume for a given cleaner
outer dimension would result and, thus, housewife effort for bag
emptying would be minimized.
It would also be advantageous to provide such a vacuum cleaner
resilient and sealing fan and motor supporting arrangement since
the number of requisite parts would be reduced, minimizing initial
cost and inventory control.
It would be even further advantageous to provide such a resiliently
mounted cleaner with a novel cooling air arrangement.
SUMMARY OF THE INVENTION
The invention is provided in a canister or tank-type cleaner having
a housing containing the conventional dirt bag, fan, and motor,
utilized to perform the normal cleaning function. The motor and fan
system are disposed, vertically aligned and generally centrally
relative to the cleaner housing, while the disposable bag is
contained in a substantially annular chamber extending around the
motor housing and between it and the cleaner housing.
In both embodiments of the invention, a pair of resilient mounting
rings of generally annular configuration are utilized. These rings
are shaped from a series of resilient solid spheres disposed
adjacent to one another but in slightly spaced relation, and
extending in a ring configuration. Connecting the spheres are a
pair of intersecting generally flat bands, one of the bands
extending horizontally and annularly with the spheres and cutting
across them at their vertical midpoints, and the other band
disposed at a right angle and vertically to the first band also
cutting across the midpoint of the spheres. These resilient rings
are disposed, one generally above and one generally below the fan
system for the cleaner. The lower and larger diameter resilient
mounting ring is situated between the bottom pan of the cleaner and
the bottom side of the diffuser to provide vibration and noise
isolation between the lower portion of the fan system and the lower
portion (bottom pan) of the cleaner housing. The upper and smaller
diameter resilient mounting ring is disposed between a bottom,
inwardly turned portion on the intermediate shell of the cleaner
housing and the motor mounting plate, disposed below the motor and
above the fan system, to provide vibration and noise isolation
between the upper portion of the fan system and motor and the
upwardly extending remainder of the cleaner housing.
Because of the upper and lower locations of the resilient mounting
rings, relative to the fan system, and their interrelation with the
bottom pan, diffuser, motor mounting plate and inturned portions of
the intermediate shell, these resilient rings also serve as a
sealing means to insure the proper passage of fan-induced air flow
through and outwardly of the cleaner.
The relative difference in diameters of the resilient mounting
rings and thereby the transverse displacement of their ring-like
cross sections and their specific locations also gives the effect
of a much greater width dimension of vibration suppression means to
thereby greatly attenuate vibration induced rocking and also
considerably reduce the overall requisite dimensional extent of the
resilient support motor-fan system mounting to provide a low and
relatively small diameter cleaner for a given annular cleaner
bag-receiving volume.
In the first embodiment of the invention, a multi-stage fan system
is utilized to provide a cleaner of high performance, with air
discharge from this system substantially radially around an annular
periphery between the bottom pan and the lower inturned portion of
the intermediate shell. An induced flow of cooling air for cleaner
discharge air may be led through the bottom portion of the bottom
pan and inwardly to the fan system through a diffuser for this
system.
In a second embodiment of the invention, a single-stage fan system
is utilized to provide a cleaner with relatively lower performance
and also cost. Discharge of air from this system is downwardly
through an orifice in the bottom pan so that a cushion of air is
formed beneath the cleaner to give it an "air ride" characteristic.
A supplemental pan disposed between the bottom pan and intermediate
shell permits the entrance of cooling air for cooling cleaner air
discharge. This air enters the cleaner radially around an annular
periphery between the outer diametric extents of the bottom pan and
supplemental pan. This cooling air then passes between these
members to enter the fan system, proper, through the diffuser
therefor.
DESCRIPTION OF THE DRAWINGS
Reference may now be had to the accompanying drawings for a better
understanding of the invention, both as to the organization and
function, with the illustration being only exemplary, and in
which;
FIG. 1 is an elevational, cross-sectional view of the cleaner of
the first embodiment;
FIG. 2 is a plan cross-sectional view of the cleaner of the first
embodiment taken on line 2--2 of FIG. 1;
FIG. 3 is a fragmentary, elevational, cross-sectional view of a
portion of FIG. 1, with the same enlarged;
FIG. 4 is a perspective view of the resilient ring members utilized
in the first embodiment of the invention;
FIG. 4A is a fragmentary, plan view of a typical resilient ring
member utilized in the invention;
FIG. 4B is a fragmentary, elevational view of the ring member;
FIG. 4C is a cross-sectional elevational view of the ring member
taken on line 4C--4C of FIG. 4B;
FIG. 4D is a view similar to FIG. 4C but taken on line 4D--4D;
FIG. 5 is an elevational, cross-sectional view of the second
embodiment of the invention; and
FIG. 6 is a fragmentary, elevational, cross-sectional view of a
portion taken at a slightly different location than FIG. 5 and with
the same enlarged.
DESCRIPTION OF THE FIRST EMBODIMENT
Referring now specifically to FIGS. 1 to 3 of the appendant
drawings, it can be seen that a canister cleaner 10 is provided
having a generally cylindrical housing 12 comprised of an upwardly
opening intermediate shell 14, an upper shell 16, a relatively flat
dish-shaped bottom pan 18, and a medallion section 20. Conveniently
disposed within the housing 12 is a motor 22 that provides the
driving force for a fan system 24 having a pair of fans 26 and 28
so that the high performance of a two-stage fan system may be had
with the cleaner 10.
A hose coupling fitting 30 communicates with the interior of
canister cleaner housing 12 so that suction cleaning air is led
through generally rigid intermediate shell 14 to a generally
annular bag-containing chamber 32 in which is disposed a
dirt-collecting bag 34. The flow of cleaning air is through hose
coupling fitting 30, through dirt-collecting bag 34, through a
secondary filter 36 mounted at the top of a housing 38 for motor
22, and then through the motor 22 and fan system 24 to be
discharged from the cleaner in a manner to be later described.
A hinge 40 mounts the upper shell 16 to the intermediate shell 14
of the housing 12 so that the canister cleaner 10 may be opened and
the dirt-collecting bag 34 replaced when necessary. A sealing
gasket 42, disposed between the upper and intermediate shells,
insures an airtight jointure between these two shells at their
common, abutting edges. A storage tool well 44, disposed in the
upper shell 16, provides a means for the easy insertion of a
cleaning tool or the like, with this tool well extending vertically
into a pocket, sealed with respect to chamber 32 and serving to
interrupt its annular configuration.
Canister cleaner 10 also includes a handle 46, attached to
intermediate shell 14, that provides a grasping means for the user
of the cleaner. A pair of large transport rear wheels 48, 48 (only
one shown) and a medially disposed front caster wheel 50 are
rotatably connected to housing 12, with these wheels providing
ground-engaging contact for the canister cleaner 10 so that it may
be easily moved from room to room for cleaning purposes.
Insofar as related, the general configuration of canister cleaner
10 is conventional, with the inventive aspects of the instant
embodiment yet to be described. Proceeding now with that
description, it can be seen that the fan system 24 and electric
motor 22 of canister cleaner 10 receive their support from the
bottom pan 18 through the aegis of the wheels 48, 48 acting through
the intermediate shell 14 and the wheel 50 supporting the bottom
pan 18 above the floor. Thus, the bottom pan 18 serves as the
primary support means for the moving elements of the cleaner 10.
Bottom pan 18 is generally circular in plan and includes a central,
partially domed-shaped section 52, which dome provides for
clearance for the part above it. Integrally joined to domed-shaped
section 52 is an annularly extending, receiving grooved section 54
that provides a reception means for one of the resilient mounting
rings of the invention. Outwardly of grooved section 54 of bottom
pan 18 is a tapered section 56 that extends upwardly and radially
outwardly and merges into a flattened annularly extending section
58 on which caster wheel 50 is mounted in an upper offset relation,
relative to the major extent of bottom pan 18. Outwardly of
flattened section 58, another integrally joined tapered section 60
is disposed, with the same extending upwardly at an angle to form a
guide for the peripheral discharge of cleaner air (to be described
later) and to present a more attractive appearance to the outer
periphery of the cleaner.
Disposed in receiving grooved section 54 of bottom pan 18 is a
resilient annular ring member 62 that forms the first, lower
resilient support means for the motor 22 and fan system 24 of the
canister cleaner 10. This resilient annular ring member takes its
shape (FIGS. 4-4D) from a series of spaced, solid, resilient
material spheres 64 that are arranged in a circle and integrally
joined by a horizontally extending thin, flat, annular ring 66 of
the same material, disposed centrally relative to the height of
spheres 64 so as to, in effect, cut the spheres into vertically
attached hemispheres. The inner and outer peripheries of the
annular ring form a circumference equal to the general
circumference of the spaced spheres 64. Also integral with the
spheres 64 is another resilient ring 68 that extends vertically to
form a cylinder of short height and to join the spheres 64
vertically and, in effect, to divide the spheres into horizontally
attached hemispheres. The top and bottom edges of ring 68 are flat
and generally tangent to the spheres 64 at their connection points
thereto.
The configuration adopted for the resilient annular ring member 62
provides a relatively soft, resilient support, but permits the use
of a relatively hard (high durometer 35-40 Scale A) natural rubber
or other relatively hard, resilient material having a higher
durability than a soft, resilient material and, therefore, a longer
service life. It should also be noted that the vertical ring 68 is
thicker in cross section than the horizontal ring 66 so that the
total resilient supportive effect is slightly stiffer in the
vertical weight-bearing direction than the horizontal direction and
so that the upper and lower terminations of vertical ring 68 form
faces 69, 69 having sufficiently extensive bearing area to provide
good sealing characteristics.
Mounted on and supported by the resilient ring member 62 is a
diffuser 70 that forms a part (second stage diffusion) of fan
system 24. This diffuser includes a horizontally extending bottom
plate 72 integrally attached to a thin side-walled, cylindrical
portion 74 extending vertically a sufficient extent so as to
receive the fans 26, 28 within its confines. A receiving grooved
portion 76, extending annularly in the bottom plate 72 of diffuser
70, houses the upper half of resilient ring member 62. This
diffuser, ideally, may include directing blades and/or ramps which
tend to turn the radial air discharge from the second stage fan 26
to an upwardly directed flow so as to guide and partially diffuse
the same to provide a smoothed air flow and reduce air generated
noise level.
As already set out, fans 26, 28 are housed within the confines of
cylindrical portion 74 of diffuser 70. This is accomplished in the
following manner. A motor shaft 78 of motor 22 extends therefrom in
a downward direction into the space defined, in part, by the
cylindrical portion 74 of diffuser 70, with the fans 26, 28 mounted
fast to the shaft 78 to rotate with the shaft by a shaft nut 80
threaded on the bottom of shaft 78. An upwardly disposed diffuser
82 (the first stage diffuser) which takes radially discharged air
from fan 28 and directs it to the eye of fan 26, is mounted
inwardly of the fan 26, within the space afforded by cylindrical
portion 74 of diffuser 70.
This diffuser also includes a bottom plate 83 to which is
integrally joined a thin-walled, vertically and axially inwardly
extending cylindrical portion 84, terminated by an upwardly,
outwardly extending, overturned rim portion 86. This rim portion
centers the first stage diffuser 82 relative to the space afforded
by the second stage diffuser 70 by mating engagement against
outwardly extending, overturned rim portion 88 of a motor mounting
plate 90, the motor mounting plate being fixed with respect to a
motor shell 92 of motor 22 by a series of bolts 94, 94 (only one
shown). Downward or outward movement of diffuser 82 is prevented by
its seating upon the top of the blading of the diffuser 70 with the
ramps thereof maintaining it laterally.
In order to assemble the first stage diffuser 82 and the motor
mounting plate 90 in fixed relation to the second stage diffuser
70, a series of three spring clips 96, 96, 96 (only one shown),
generally C-shaped in cross section, and with rim-receiving
portions 98, 98, generally at the tips or terminations of the curve
of the C are provided. These clips engage over the mated rim
portions 86, 88 of the first stage diffuser 82 and motor mounting
plate 90, respectively, at their tops, and over a rim portion 100,
integral with and extending annularly around the bottom of second
stage diffuser 70, at their bottoms. The motor 22, motor mounting
plate 90, first stage diffuser 82, fan 28, second stage diffuser
70, and fan 26 are thereby actually one assemblage resting on and
resiliently supported by resilient ring member 62.
The second or upper resilient suspension means is formed by a
second or upper resilient ring member 102 formed in substantially
the same way as lower resilient ring 62 to thereby contain spheres
64, a horizontal joining ring 104, similar to the horizontal ring
66 of resilient ring member 62, but of smaller internal and
external diameter, and a vertical joining ring 106 similar to the
vertical ring 68 of resilient ring member 62, but of smaller
internal and external diameter, with a pair of sealing faces 107,
107 on the upper and lower terminations of ring 106. Because of
this last mentioned difference in diameters, the horizontal lateral
extents of resilient ring members 62, 102, respectively, are
transversely offset relative to each other so that the total
resilient effect of these ring members is much greater than the
resilient effect of either, singly. Thus, the resilient force
provided against vibration-induced rocking, works over a larger
lateral or horizontal extent (i.e. moment arm), yielding a
resilient vibration dampening effect, substantially, of a resilient
support or supports of sufficient transverse area to have an
effective moment arm equal to the sum of the effective moment arms
of both resilient rings 62 and 102.
Further, because of the relative disposition of these rings, the
larger one essentially below and radially inward of the periphery
of diffuser 70, and the other, smaller one, further inward from the
periphery of diffuser 70 and mounted in a grooved portion 108 of
intermediate shell 14, resting on a curved surface 91 formed in
motor mounting plate 90, permits the use, overall, of a relatively
small diameter assemblage for the resilient mounting means, fans,
diffusers and motor.
As set out above, the vibration isolation of the motor 22 and fan
system 24 from the canister cleaner housing 12 is completed by the
upper resilient ring member 102 that seats in the receiving grooved
portion 108, formed in and extending annularly around the bottom
portion of the intermediate shell 14, proximate its inner
termination. Thus, the upper resilient ring member prevents the
transmission of vibrations and noise to those portions of the
cleaner housing 12 thereabove including the intermediate shell 14,
situated most closely adjacent to it, and the upper shell 16 and
medallion section 20. At the same time, lower resilient ring member
60 prevents passage of noise and vibration to the bottom pan 18 and
thence to the remainder of the cleaner housing through a series of
connecting studs 51, 51, 51 (only one shown).
These studs are assembled to the canister cleaner 10 in the
following manner. Each of these studs is projection welded into the
bottom pan 18 so as to extend upwardly through a series of small
bores 110, 110, 110 (only one shown) in intermediate shell 14 so
that a series of nuts 112, 112, 112 (only one shown) may be mounted
on their extended ends and drawn tight to provide a compressive
force to the lower and upper resilient mounting ring members 62,
102, respectively, to insure that the motor-fan arrangement is
functionally, resiliently sandwiched by these resilient means.
Tightening of each of the nuts 112 performs another important
function; as the lower and upper resilient means compress, they
each tend to distort into a flatter solider ring configuration
pressing the faces 69, 69 and 107, 107 into tighter sealing
engagement. Then, because of their locations, essentially above and
below the fan system, the resilient ring members serve their
secondary, albeit as important, sealing function to insure proper
air flow within the cleaner 10.
The operation of the canister cleaner 10 should now be apparent. A
part of the air stream flow (suction cleaner air) as set out
earlier, enters motor housing 38 for cooling of the motor. Such
entrance is gained through a series of elongated apertures, e.g.,
114, 116 and 118 in the top of motor housing 38 (note the air
indicating arrows). This air then passes inwardly into motor 22
through a series of circumferentially disposed apertures (not
shown) in the top of its shell casing 92 and also through apertures
(not shown) in the bottom side 120 of the casing 92 to first stage
fan 28, first stage diffuser 82, and then second stage fan 26.
In order to lower the discharge temperature of this cleaner suction
air, it is then mixed with outside ambient air which moves through
a series of perforations 122 in bottom pan 18, a series of
apertures 124 in the bottom face of second stage diffuser 70, from
whence it passes along the back face of the second stage fan 26 to
merge with the suction cleaner air discharged from this fan.
The outside ambient air, utilized for the mixing, may be induced by
a "viscous" fan formed by the back face of fan 26, by a series of
outwardly extending blade tabs used in the assembly of the blades
of fan 26 to the front and back faces of the fan or obviously, by
another or third fan mounted outwardly and downwardly from fan 26,
or merely by the induced air stream motivated (aspirated) by the
movement of the primary suction cleaning air. In the instant
invention the tabs 125 are utilized as the auxiliary air fan
means.
The combined flow of air moves through the diffuser 70 and is
discharged into a chamber 126 formed between the diffuser 70, the
motor mounting plate 90, and the bottom face of intermediate shell
14, at which time it changes direction by 180.degree. to move
downwardly between the second-stage diffuser 70 and bottom face of
the intermediate shell. Air is finally discharged upwardly around
the periphery of canister cleaner 10, between the termination of
the top face of bottom pan 18 and lower, outer face portions of
intermediate shell 14 through an opening 128. This upward discharge
induces a flow of ambient air into its stream so that the discharge
air is again mixed with ambient air, with the whole being
dissipated over a wide flow area to eliminate unwanted drafts. It
should also be noted that no unwanted backflow or significant
leakage of air occurs during movement of the air through the fan
system 24 or through the cleaner volume leading to discharge
through opening 128 since the resilient ring members 62 and 102
sealingly prevent this at those locations when leakage is most
likely to occur. Thus, a highly effective cleaner of the " high"
performance type is obtained and fully satisfied by the foregoing
description.
DESCRIPTION OF THE SECOND EMBODIMENT
In the description of the second embodiment, like numerals are
utilized for like parts contained jointly in it and the first
embodiment of the invention and primed numerals are utilized for
modified parts.
Refering now to FIGS. 5 and 6, it can be seen that a canister
cleaner 10' is provided having a housing 12' including an upwardly
opening, generally rigid intermediate shell 14' and a bottom
relatively flat dish-shaped pan 18' and an intermediate pan 19
disposed between the bottom 18' and lower portions of the
intermediate shell 14'. Conveniently disposed within the housing
12' is a motor 22' that provides a driving force for a fan system
24' including a single fan 26'.
A hose coupling fitting 30 communicates with the interior of the
housing 12' to permit the flow of suction cleaner air to pass into
a disposable dirt-collecting bag 34 and from thence through the
motor 22' to cool it and then through the fan 26'. Air is
eventually discharged out the bottom of the cleaner through a
blower opening 35 so that an "air ride" is obtained by a cushion of
air formed under the bottom pan 18' of the housing 12'.
Again, in so far as related, the general configuration of canister
cleaner 10' is conventional, with the inventive aspects of this
second embodiment yet to be described. Proceeding now with that
description, fan system 24' and electric motor 22' receive their
support from the bottom pan 18' through the aegis of a bottom,
annularly shaped, integral rim portion 37 of bottom pan 18',
situated generally near its outer, lowermost portions and extending
downwardly from the remainder of bottom pan 18'. Bottom rim portion
37 has extended flattened spots 39, 39, 39 (only one shown) on
which the canister cleaner 10' rests when not operating. When
cleaner 10' is operative and air is discharging through blower
opening 35, the bottom rim portion 37 forms the confines for the
air cushion on which cleaner 10' rides. Bottom pan 18' also
includes a central, partially domed-shaped portion 52' and a
receiving grooved portion 54', disposed radially outwardly of the
domed portion 52' to complete its general configuration.
Disposed immediately above the bottom pan 18' is the intermediate
pan 19. This last-named pan is vertically spaced from, but conforms
generally in configuration to bottom pan 18' at its outer, radial
portions and maintains this vertical spacing, except for a series
of three bolt-receiving indents 41, 41, 41 (only one shown), and
except at an inner terminating, receiving grooved portion 43
extending annularly around intermediate pan 19 and abuttingly and
matingly engaging within grooved portion 54' of bottom pan 18'.
A lower resilient ring member 62', similar to the ring member 62
but of a differing diameter, is disposed above intermediate pan 19
and is lodged in grooved portion 43 so as to resiliently mount a
diffuser 70' that may have, as in the first embodiment, vanes or
blades (not shown) which turn the radially discharged air from fan
26' axially. Diffuser 70' also includes a receiving grooved portion
76', which conforms generally to the upper, outer periphery of
resilient ring member 62' so that the resilient ring member 62 is
securely located, relative to the bottom pan, intermediate pan and
diffuser by the receiving groove portions 43, 54' and 76'. A series
of projection welded studs 51', 51', 51' (only one shown) and a
series of spacers 45, 45, 45 (only one shown) maintain this
structural relationship.
A motor mounting plate 90' of generally annular configuration is
attached to motor 22' by a series of bolts 94', 94' (only one
shown) and includes a curved portion 91' shaped to support and
conform to a bottom portion of an upper resilient ring member 102'.
Motor mounting plate 90' registers with diffuser 70' in the same
manner as mounting plate 90 registers with diffuser 70 in the first
embodiment (through the ramps end blades of diffuser 70') and also
includes a rim portion 88' shaped to conform to upper rim-receiving
portions 98' of C-shaped spring clips 96'.
For upward seating of a resilient ring member 102', a bottom
portion of intermediate shell 14' includes a downwardly opening,
receiving grooved portion 108' which is situated close to the
radially lower, inner termination of intermediate shell 14'. Thus,
once the intermediate shell 14', intermediate pan 19, and bottom
pan 18' have been tightly assembled together through the aegis of a
series of nuts 112, 112, 112 (only one shown), each tightened on a
stud 51', the resilient ring members 62' and 102' are compressed to
provide not only a sandwiching resilient mounting means for the fan
system 24', but also a pair of sealing means to prevent back flow
or significant leakage of the air stream in that part of the
cleaner 10' encompassed by the fan, diffuser and discharge.
It should be clearly pointed out here that the ring members 62' and
102' are configured exactly like ring members 62 and 102 and
include solid spheres joined by a thin horizontal ring and a
thicker vertical ring, these rings dividing the spheres
substantially into sphere quadrants. Also, the vertical ring
includes upper and lower sealing faces so that the function and
effect of these sealing rings is substantially the same as that
given by the sealing rings 62 and 102.
In order to maintain motor mounting plate 90' and diffuser 70' in
assembled relation, each C-shaped spring clip 96' also includes a
lower rim-receiving portion 98' that engages over a rim portion 86'
of diffuser 70'. Thus, the inherent spring force of C-shaped spring
clips 96', 96' 96' prevents separation of motor 22', fan 26' and
the diffusers 70' so that these structures of canister cleaner 10'
comprise a single assemblage. Fan 26' is, of course, similar to the
first embodiment, held fast to a motor shaft 78' by a shaft nut 80
mounted thereon.
Suction cleaner air within canister cleaner 10' flows from the
dirt-collecting bag into a motor housing 38' of motor 22' through a
series of elongated apertures, e.g., 114', 116' and 118' in motor
housing 38' and then passes through the motor 22' in the manner
described relative to the first embodiment and enters the eye of
the fan 26' to be discharged therefrom. At the same time, a flow of
induced, cooling ambient air is provided to cool the discharge of
the hot suction cleaner air by gaining entrance to the cleaner
through a peripheral opening afforded by the space between bottom
pan 18' and intermediate pan 19.
This cooling air passes between these two elements as they extend
beneath the first resilient ring member 62' and then is discharged
into a space 85, between the bottom face of diffuser 70' and the
top surface of bottom 18. The cooling air is then induced to flow
through a series of apertures 124 in diffuser 70' where it mixes
with the discharge air from fan 26' and the mixed air then flows
through diffuser 70' to be discharged between the bottom face of
intermediate shell 14' and the top face of intermediate pan 19. Air
is eventually discharged to atmosphere through the blower opening
35, as set out previously.
It should be evident that the embodiments described clearly and
satisfactorily fulfill all the advantages of the invention set out
in the beginning portion of the description. Further, it should be
apparent that many modifications could be obviously made to the
embodiments described which would still fall within their spirit
and confines.
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