WATER FLOW-DRIVEN ROTARY AND VIBRATIONAL CLEANING BRUSH

BROSSE DE NETTOYAGE ROTATIVE ET VIBRANTE ACTIONNEE PAR L'EAU

English Abstract

Water flow-driven rotary and vibrational cleaning brush including. a base
seat,
a water wheel, a brush seat and a transmission unit. The base seat is a
receptacle
having an opening facing downward. An outer and an inner faces of the base
seat
are respectively formed with a fluid inlet and a nozzle. The water wheel is
disposed
in the base seat and rotatable about a shaft rod. The water wheel is impacted
and
rotated by the fluid injected by the nozzle. The brush seat is positioned
under the
base seat. A brush section is disposed under the brush seat. The transmission
unit
is disposed between the brush seat and the water wheel and includes a
transmissions section connected with the brush seat for transmitting the
rotational
power of the water wheel to drive the brush seat. The rotational axis of the
transmission section is other than the central axis of the brush seat, whereby
the
central axis revolves about the rotational axis and the brush seat is driven
to rotate
and vibrate so as to achieve enhanced cleaning effect.

Claims

WHAT IS CLAIMED IS:

1. Water flow-driven rotary and vibrational cleaning brush comprising:
a base seat which is a receptacle having an opening facing downward, an
outer face of the base seat being formed with a fluid inlet, an inner face of
the
base seat being formed with a nozzle which receives a fluid coming from the
fluid inlet and injects the fluid;
a water wheel disposed in the base seat and rotatable about a shaft rod,
a series of vanes being arranged on a circumference of the water wheel, the
fluid injected by the nozzle impacting the vanes to drive and rotate the water
wheel; and
a brush seat positioned under the base seat, a brush section being
disposed under lower side of the brush seat, a transmission unit being
disposed
between the brush seat and the water wheel, the transmission unit serving to
accept the rotational power of the water wheel, the transmission unit
including a
transmissions section for outputting the rotational power of the water wheel
to
drive the brush seat, the transmission section being rotatable about a
rotational
axis, said cleaning brush being characterized in that the central axis of the
brush seat is other than the rotational axis.

2. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
1,
further comprising a bridge section disposed between the transmission unit and
the brush seat, wherein:

13


an upper and a lower ends of the bridge section being respectively
provided with a first and a second connecting sections which are respectively
connected with the transmission section and the brush seat for transmitting
the
rotational power of the transmission unit to the brush seat and making the
brush
seat rotate;
the brush seat includes a third connecting section for connecting with the
second connecting section, the central axis of the third connecting section
being other than the central axis of the brush seat;
the central axis of the first connecting section coincides with the rotational
axis;
the central axis of the second connecting section is other than the
rotational axis; and
the relative angular displacement between the second and third
connecting sections is changeable, whereby the deflection between the central
axis of the brush seat and the rotational axis is adjustable.

3. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
2,
wherein:
the first and second connecting sections form a cylindrical body, the
circumference of the second connecting section being formed with multiple
circumferentially arranged teeth, the third connecting section being an
opening,
the inner circumference of the third connecting section being formed with

14


multiple circumferentially arranged teeth for engaging with the teeth of the
second connecting section; and
the outer circumference of lower end of the second connecting section is
formed with an annular groove for receiving therein an annular resilient
member,
an outer diameter of the resilient member being slightly larger than the inner
diameter of the third connecting section, whereby the third connecting section
can be more firmly connected with the second connecting section.

4. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
1,
further comprising a first support rack fixedly connected with the base seat
and
the shaft rod, the transmission unit being disposed on the first support rack.

5. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
2,
further comprising a first support rack fixedly connected with the base seat
and
the shaft rod, the transmission unit being disposed on the first support rack.

6. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
5,
further comprising a second support rack which is positioned under the first
support rack and fixedly disposed in the base seat, the second support rack
being formed with an opening through which the transmission section is fitted.

7. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
4,
further comprising an embracing body which is a polygonal body disposed on
the first support rack and defining an internal space in which the
transmission
unit is embraced.





8. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
5,
further comprising an embracing body which is a polygonal body disposed on
the first support rack and defining an internal space in which the
transmission
unit is embraced.

9. Water flow-driven rotary and vibrational cleaning brush as claimed in claim
7,
wherein the embracing body is formed with at least one perforation.

10. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 8,
wherein the embracing body is formed with at least one perforation.

11. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 5,
further comprising a first, a second and a third lubricant members, the first
lubricant member being disposed between the base seat and the water wheel,
the second lubricant member being disposed between the water wheel and the
first support rack, the third lubricant member being disposed between the
lower
end of the shaft rod and the transmission section, the first and second
lubricant
members being ring members through which the shaft rod is fitted, the third
lubricant member being a hollow cylindrical member through which the shaft
rod is fitted.

12. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 6,
further comprising a first, a second, a third and a fourth lubricant members,
the
first lubricant member being disposed between the base seat and the water
wheel, the second lubricant member being disposed between the water wheel
and the first support rack, the third lubricant member being disposed between
the lower end of the shaft rod and the transmission section, the fourth
lubricant



16




member being disposed between the transmission section, the second support
rack and the bridge section, the first and second lubricant members being ring
members through which the shaft rod is fitted, the third and fourth lubricant
members being hollow cylindrical members through which the shaft rod and the
transmission section are fitted.

13. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 3,
wherein a first mark is disposed on lower face of the second connecting
section
and several second marks are disposed on lower face of the brush seat to
indicate the deflection for a user to conveniently identify, the first mark
being a
triangle, while each second mark being two circles overlapping each other in
different manners.

14. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 1,
wherein the brush section is a series of brush hairs.

15. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 1,
wherein several reverse hook bodies are arranged on the lower side of the
brush seat at intervals for hooking and connecting with the brush section, the
brush section being a sponge body.

16. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 6,
wherein a series of brush hairs are arranged along the circumference of lower
side of the second support rack to surround the brush section.

17. Water flow-driven rotary and vibrational cleaning brush comprising:
a base seat which is a receptacle having an opening facing downward, an



17




outer face of the base seat being formed with a fluid inlet, an inner face of
the
base seat being formed with a nozzle which receives a fluid coming from the
fluid inlet and injects the fluid;

a water wheel disposed in the base seat and rotatable about a shaft rod,
a series of vanes being arranged on a circumference of the water wheel, the
fluid injected by the nozzle impacting the vanes to drive and rotate the water
wheel; and

a brush seat positioned under the base seat, a brush section being
disposed under lower side of the brush seat, a transmission unit being
disposed
between the brush seat and the water wheel, the transmission unit serving to
accept the rotational power of the water wheel, the transmission unit
including a
transmissions section for outputting the rotational power of the water wheel
to
drive the brush seat, the transmission section being rotatable about a
rotational
axis, said cleaning brush being characterized in that the cleaning brush
further
comprising a first support rack, the first support rack being fixedly
connected
with the base seat and the shaft rod, the transmission unit being disposed on
the first support rack.

18. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 17,
further comprising an embracing body which is a polygonal body disposed on
the first support rack and defining an internal space in which the
transmission
unit is embraced.

19. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 17,
further comprising a first, a second and a third lubricant members, the first



18




lubricant member being disposed between the base seat and the water wheel,
the second lubricant member being disposed between the water wheel and the
first support rack, the third lubricant member being disposed between the
lower
end of the shaft rod and the transmission section, the first and second
lubricant
members being ring members through which the shaft rod is fitted, the third
lubricant member being a hollow cylindrical member through which the shaft
rod is fitted.

20. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 17,
further comprising a second support rack which is positioned under the first
support rack and fixedly disposed in the base seat, the second support rack
being formed with an opening through which the transmission section is fitted.

21. Water flow-driven rotary and vibrational cleaning brush as claimed in
claim 20,
further comprising a first, a second, a third and a fourth lubricant members,
the
first lubricant member being disposed between the base seat and the water
wheel, the second lubricant member being disposed between the water wheel
and the first support rack, the third lubricant member being disposed between
the lower end of the shaft rod and the transmission section, the fourth
lubricant
member being disposed between the transmission section, the second support
rack and the bridge section, the first and second lubricant members being ring
members through which the shaft rod is fitted, the third and fourth lubricant
members being hollow cylindrical members through which the shaft rod and the
transmission section are fitted.



19

Description

CA 02383573 2002-04-26
.,
WATER FLOW-DRIVEN ROTARY AND VIBRATIONAL CLEANING BRUSH
BACKGROUND OF THE INVENTION
The present invention is related to a cleaning brush, and more particularly to
a
fluid-driven rotary cleaning brush.
A conventional cleaning brush is composed of a stem and a brush head
having brush hairs and fixed on the stem. When cleaning a place with such
cleaning
brush, a user first dips the brush hairs into a detergent and then uses the
brush
head to brush the dirty place such as a floorboard or a wall face. Thereafter,
the
user can use a sprinkling gun to sprinkle the dirty place. An improved
cleaning brush
has been developed. The brush head of the cleaning brush is formed with an
opening for connecting with a water tube or a hollow stem connects the brush
head
with the water tube, whereby the water can flow out from the brush head.
However,
with such cleaning brush, a user still has to consume a lot of strength to
brush a
dirty place with the brush head.
Fig. 1 shows a further improved cleaning brush which utilizes water flow to
drive a water wheel and thus rotate a cleaning brush head so as to save
strength.
Such cleaning brush includes a seat body 90, a water wheel 91 and a brush head
92. The outer face and inner face of the seat body 90 are respectively formed
with a
fluid inlet 901 and a nozzle 902. The water wheel 91 is disposed in the seat
body 90.
A series of vanes are arranged on the circumference of the water wheel 91. The
fluid impacts the vanes to rotate the water wheel 91. 'The brush head 92 is
positioned under the seat body 90. The lower side of the brush head 92 is
provided
with a series of brush hairs 93. A gear set 94 is disposed between the brush
head
i

CA 02383573 2002-04-26
92 and the water wheel 91. When the water wheel 91 rotates, the brush head 92
is
driven by the gear set 94 to rotate.
The above domestic water flow-driven rotary cleaning brush still has some
shortcomings as follows:
1. The domestic water pressure is not sufficiently great so that the driving
force is not so great. Moreover, no lubricant member is provided for the
respective rotary members so that the transmission efficiency is greatly
reduced and the brush head 92 is poorly rotated In the case that a user
presses the cleaning brush with a slightly greater force, even the brush
head will be stopped from rotating.
2. The gear set 94 includes an elongated rod 944 downward extending to
connect with the brush head 92 for transmitting the rotational power of the
water wheel 91 to the brush head 92. The rotational axis 944' of the
elongated rod 944 coincides with the central axis 92' of the brush head 92.
Accordingly, the brush hairs 93 brush the dirty place generally in the
same direction so that it is uneasy to fully clean up the dirt.
3. The gear set 94 is totally exposed to the fluid so that the impact of the
fluid will reduce the transmission efficiency of the gear set.
4. When using the cleaning brush to brush a dirty place, a user must
additionally dip the brush hairs 93 into a detergent or first apply the
detergent to the dirty place and then brush the dirty place with the
cleaning brush. This is quite inconvenient to the user.
2

CA 02383573 2002-04-26
Furthermore, the gear set 94 includes a first gear 941 fixedly disposed above
the water wheel 91, a middle gear 942 adjacent to the first gear 941 and a
second
gear 943 positioned above the first gear 941. The upper end of the elongated
rod
944 is connected with the second gear 943, while the lower end of the
elongated rod
944 is connected with the brush head 92. Accordingly, the power is first
upward
output and then transmitted from the upper end of the elongated rod 944 to the
brush head 92 connected with the lower end of the elongated rod 944.
Therefore,
the power transmission effect is poor and thus the cleaning effect of the
brush head
92 is poor.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a water
flow-driven rotary and vibrational cleaning brush which has promoted
transmission
efficiency and is able to effectively cleaning up dirt.
It is a further object of the present invention to provide the above water
flow-driven rotary and vibrational cleaning brush which contains therein a
detergent
for convenient and ready use.
According to the above objects, the water flow-driven rotary and vibrational
cleaning brush of the present invention includes a base seat, a water wheel, a
brush
seat and a transmission unit. The base seat is a receptacle having an opening
facing downward. An outer and an inner faces of the base seat are respectively
formed with a fluid inlet and a nozzle. The water wheel is disposed in the
base seat
and rotatable about a shaft rod. The water wheel is impacted and rotated by
the fluid
injected by the nozzle. The brush seat is positioned under the base seat. A
brush
section is disposed under the brush seat. The transmission unit is disposed
between
3

CA 02383573 2002-04-26
the brush seat and the water wheel and includes a transmissions section
connected
with the brush seat for transmitting the rotational power of the water wheel
to drive
the brush seat. The rotational axis of the transmission section is other than
the
central axis of the brush seat, whereby the central axis revolves about the
rotational
axis and the brush seat is driven to rotate and vibrate so as to achieve
enhanced
cleaning effect.
The present invention can be best understood through the following
description and accompanying drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a partially perspective exploded view of a conventional rotary
cleaning
brush;
Fig. 2 is a perspective exploded view of a preferred embodiment of the present
invention;
Fig. 3 is a perspective assembled view of the base seat, water wheel and shaft
rod of the preferred embodiment of the present invention;
Fig. 4 is a perspective assembled view of the transmission unit, i:lrst
support
rack and embracing body of the preferred embodiment of the present invention;
Fig. 5 is a bottom assembled view of the base seat, water wheel, transmission
unit, first support rack and embracing body of the preferred embodiment of the
present invention;
Fig. 61 is a bottom view of the brush seat the preferred embodiment of the
present invention;
Fig. 611 is a sectional view taken along line A-A of Fig. 61;
Fig. 7111 is a bottom view of the bridge section of the preferred embodiment
of
4

CA 02383573 2002-04-26
the present invention;
Fig. 71V is a sectional view taken along line B-B of Fig. 7111;
Fig. 8 is a bottom view of the preferred embodiment of the present invention,
in which the brush section is removed; and
Fig. 9 is a bottom view of another embodiment of the brush seat of the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Please refer to Figs. 2 to 8. The water flow-driven rotary and vibrational
cleaning brush 1 of the present invention includes a base seat 11, a water
wheel 13,
a brush seat 14, a transmission unit 15 and a brush section 16.
The base seat 11 is a receptacle having an opening facing downward. The
outer face of the base seat 11 is formed with a fluid inlet 111. The inner
face of the
base seat 11 is formed with a nozzle 112 which receives the fluid coming from
the
fluid inlet 111 and injects the fluid.
The water wheel 13 is disposed in the base seat 11 and rotatable about a
shaft rod 17. A series of vanes are arranged on the circumference of the water
wheel 13. The fluid injected by the nozzle 112 impacts the vanes to drive and
rotate
the water wheel 13.
The brush seat 14 is positioned under the base seat 11. The brush section 16
such as a series of brush hairs is disposed under lower side of the brush seat
14
The transmission unit 15 such as a gear set is disposed between the brush seat
14
and the water wheel 13.
s

CA 02383573 2002-04-26
The transmission unit 15 accepts the rotational power of the water wheel 13,
including a transmissions section 151 for outputting the rotational power of
the water
wheel 13. The transmission section 151 is rotatable about a rotational axis
151 S. A
bridge section 52 is disposed between the transmission unit 15 and the brush
seat
14.
The upper and lower ends of the bridge section 52 are respectively provided
with a first and a second connecting sections 521, 522 which are respectively
connected with the transmission section 151 and the brush seat 14 for
transmitting
the rotational power of the transmission unit 15 to the brush seat 14 and
making the
brush seat 14 rotate.
The brush seat 14 and the transmission unit 15 can be assembled in the
following manners:
1. The rotational axis 151 S of the transmission section 151 is other than the
central axis 14S of the brush seat 14. The central axis 14S of the brush
seat 14 revolves about the rotational axis 151 S, whereby the brush seat
14 is driven to rotate and vibrate so as to achieve an enhanced cleaning
effect.
2. Referring to Figs. 2, 6 and 7, the brush seat 14 includes a third
connecting section 42 for connecting with the second connecting section
522. The central axis 42S of the third connecting section 42 is other than
the central axis 14S of the brush seat 14.
6

CA 02383573 2002-04-26
The central axis 521 S of the first connecting section 521 coincides with the
rotational axis 151 S.
The central axis 522S of the second connecting section 522 is other than the
rotational axis 151 S.
The first and second connecting sections 521, 522 form a cylindrical body. The
circumference of the second connecting section 522 is formed with multiple
circumferentially arranged teeth 522'. The third connecting section 42 is an
opening
with a shape corresponding to that of the second connecting section 522. The
inner
circumference of the third connecting section 42 is formed with multiple
circumferentially arranged teeth 421 for engaging with the teeth 522' of the
second
connecting section 522. Accordingly, the relative angular displacement between
the
third connecting section 42 and the second connecting section 522 can be
freely
changed. That is, the deflection between the central axis 14S of the brush
seat 14
and the rotational axis 151 S can be adjusted to achieve different vibration
efFect.
In addition, in the case that the central axis 42S of the third connecting
section
42 and the central axis 14S of the brush seat 14 are adjusted to coincide with
each
other, the above first assembly is achieved.
The cleaning brush 1 of the present invention has the following
characteristics:
1. The central axis 14S of the brush seat 14 is other than the rotational axis
151 S, whereby the brush seat 14 is driven to rotate and vibrate so as to
more easily and effectively clean up dirt.

CA 02383573 2002-04-26
2. The deflection between the central axis 14S of the brush seat 14 and the
rotational axis 151 S can be adjusted to achieve different vibration effect.
3. The power is transmitted directly from the water wheel 13 downward to
the brush seat 14 so that better transmission efficiency is achieved.
Referring to Figs. 2 and 7, the outer circumference of lower end of the second
connecting section 522 is formed with an annular groove 522" for receiving
therein
an annular resilient member 522"'. The outer diameter of the resilient member
522"'
is slightly larger than the inner diameter of the third connecting section 42,
whereby
the third connecting section 42 can be more firmly connected with the second
connecting section 522.
Referring to Figs. 2, 4 and 5, the present invention further includes a first
support rack 18 fixedly connected with the base seat 11 and the shaft rod 17.
The
transmission unit 15 is disposed on the first support rack 18, whereby the
present
invention has firmer structure for truly and effectively transmitting the
power to the
brush seat 14. Furthermore, a second support rack 12 is positioned under the
first
support rack 18 and fixedly disposed in the base seat 11. The second support
rack
12 is formed with an opening through which the transmission section 151 is
fitted,
whereby the present invention has more rigid structure for enhancing
transmission
efficiency.
The present invention further includes an embracing body 19 which is a
polygonal body disposed on the first support rack 18 and defining an internal
space
in which the transmission unit 15 is embraced. Accordingly, the transmission
unit 15
is prevented from being impacted by the fluid so that the transmission
efficiency will
s

CA 02383573 2002-04-26
not be affected. The embracing body 19 is formed with at least one perforation
through which a little fluid can infiltrate into the embracing body 19 to wet
and
lubricate the transmission unit 15.
In the case that the deflection between the central axis 14S of the brush seat
14 and the rotational axis 151 S is not considered, the above first support
rack 18,
second support rack 12 or the embracing body 19 can be disposed in the
cleaning
brush to enhance transmission efficiency.
In the above structure, the brush section 16 is composed of a series of brush
hairs disposed under lower side of the brush seat 14 and directed downward. In
addition, referring to Fig. 9, several reverse hook bodies 44 are arranged on
the
lower side of the brush seat 14 at intervals for hooking and connecting with
the
brush section 16 ( not shown in Fig. 9 ). The brush section 16 can be a sponge
body
to meet different cleaning requirement.
A series of brush hairs are arranged along the circumference of lower side of
the second support rack 12 to surround the brush section 16. Accordingly, a
user is
prevented from being splashed by the fluid.
Referring to Fig. 2, no matter whether the deflection between the central axis
14S of the brush seat 14 and the rotational axis 151 S is considered or not,
in order
to reduce frictional force and enhance transmission efficiency, a first
lubricant
member 131 is disposed between the base seat 11 and the water wheel 13. A
second lubricant member 132 is disposed between the water wheel 13 and the
first
support rack 18. A third lubricant member 171 is disposed between the lower
end of
the shaft rod 17 and the transmission section 151 of the transmission unit 15.
A
9

CA 02383573 2002-04-26
fourth lubricant member 121 is disposed between the transmission section 151,
the
second support rack 12 and the bridge section 52. The first and second
lubricant
members 131, 132 are ring members through which the shaft rod 17 is fitted.
The
third and fourth lubricant members 171, 121 are hollow cylindrical members
through
which the shaft rod 17 and the transmission section 151 are fitted.
Referring to Figs. 2 and 8, in the case that the deflection between the
central
axis 14S of the brush seat 14 and the rotational axis 151 S is adjustable, a
first mark
522M such as a triangle can be disposed on the lower face of the second
connecting section 522. Several second marks 14M such as two circles
overlapping
each other in different manners are disposed on the lower face of the brush
seat.
Accordingly, the deflection can be indicated to and conveniently identified by
a user.
Furthermore, referring to Fig. 2, the circumference of upper face of the base
seat 11 is formed with an upward projecting annular wall 113. The upper face
of the
base seat 11 is formed with at least one first orifice 114. The present
invention
further includes an upper cover body 20 and a lower cover body 21.
The lower cover body 21 is a circular disc body. The outer circumference of
the lower cover body 21 has a shape corresponding to that of the inner
circumference of the wall 113. The lower cover body 21 is rotatably
accommodated
in the wall 113 to abut against the upper face of the base seat 11. The lower
cover
body 21 is formed with a first engaging section 211 and a second orifice 212
corresponding to the first orifice 114.
The upper cover body 20 is a parachute-shaped body with an opening facing
downward. The top end of the upper cover body 20 is formed with a material
inlet
Io

CA 02383573 2002-04-26
201 and provided with a closing cap 202. The circumference of bottom side of
the
upper cover body 20 has a shape corresponding to that of the inner
circumference
of the wall 113. The upper cover body 20 is partially rotatably accommodated
in the
wall 113, whereby the upper and lower cover bodies 20, 21 define therebetween
a
space. The upper cover body 20 is formed with a second engaging section 203
corresponding to the first engaging section 211. By means of rotating the
upper
cover body 20, the lower cover body 21 is driven and rotated. Accordingly, the
first
and second orifices 114, 212 can be aligned with each other or disaligned from
each
other. A detergent can be added into the material inlet 201 and then the upper
cover
body 20 is rotated to drive the lower cover body 21 to align or disalign the
first and
second orifices 114, 212. Accordingly, the detergent is selectively allowed to
flow
into the base seat 11 or prevented from flowing into the base seat 11 as
necessary.
Referring to Fig. 2, the upper face of the base seat 1'1 is formed with at
least
one arch dent 115 with a predetermined length. The lower face of the lower
cover
body 21 is formed with a projecting section ( not shown ) correspondingly
extending
into the dent 115. Accordingly, the lower cover body 21 is reciprocally
angularly
displaceable under restriction within a certain range and a user can
conveniently
operate the lower cover body 21 to align or disalign the first and second
orifices 114,
212. Furthermore, the upper face of the base seat 11 is formed with a first
locating
sink 116 for receiving therein a locating pin and a spring. The lower face of
the lower
cover body 21 is formed with a second locating sink ( not shown )
corresponding to
the first locating sink 116. When turning the lower cover body 21, the
locating sinks
provide a perceivable locating effect. Moreover, a predetermined area of the
central
portion of the upper face of the lower cover body 21 swells to facilitate
flowing of the
detergent to the second orifice 212.
n

CA 02383573 2002-04-26
The above embodiments are only used to illustrate the present invention, not
intended to limit the scope thereof. Many modifications of the above
embodiments
can be made without departing from the spirit of the present invention.
12

Representative Drawing