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Patent 2391204 Summary

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Claims and Abstract availability

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(12) Patent: (11) CA 2391204
(54) English Title: MULTI FUNCTION HAND TRUCK
(54) French Title: DIABLE POLYVALENT
Status: Expired
Bibliographic Data
(51) International Patent Classification (IPC):
  • B62B 1/04 (2006.01)
  • B62B 1/12 (2006.01)
  • B62B 1/18 (2006.01)
  • B62B 1/00 (2006.01)
(72) Inventors :
  • CELLI, GIULIANO (Canada)
(73) Owners :
  • DORICK VENTURES LIMITED (Canada)
(71) Applicants :
  • CELLI, GIULIANO (Canada)
(74) Agent: BLAKE, CASSELS & GRAYDON LLP
(74) Associate agent:
(45) Issued: 2011-05-24
(22) Filed Date: 2002-06-25
(41) Open to Public Inspection: 2003-12-25
Examination requested: 2007-05-24
Availability of licence: N/A
(25) Language of filing: English

Patent Cooperation Treaty (PCT): No

(30) Application Priority Data: None

Abstracts

English Abstract

A multi-function hand truck is convertible to allow lifting of a load at a spaced distance from the truck and/or is convertible for use as a wheelbarrow. A pair of lifting arms co-operate with the frame of the hand truck to extend outwardly therefrom and allow the frame of the hand truck to provide a mechanical advantage for lifting. The wheels of the truck are moveable rearwardly for conversion to a wheel barrow mode. An open top container is positioned within the frame of the hand truck for receiving material. The multi-function hand truck is efficiently stored in a vertical orientation.


French Abstract

Un diable multifonctionnel est convertible pour soulever une charge à une certaine distance du camion et/ou est convertible en brouette. Une paire de bras de levage fonctionnent concurremment avec l'ossature du diable pour s'étendre à l'extérieur et permettre à l'ossature de faciliter mécaniquement le levage. Les roues du diable sont mobiles vers l'arrière pour la conversion en mode de brouette. Un contenant à dessus ouvert est placé dans l'ossature du diable pour recevoir du matériel. Le diable multifonctionnel peut être rangé efficacement en position verticale.

Claims

Note: Claims are shown in the official language in which they were submitted.




THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A convertible wheeled device for carrying a load
comprising an elongate frame with a pair of handles extending
from one end of said frame and a pair of wheels pivotally
secured either side of said frame at an end thereof opposite
said handles, said wheels being movable between a first
operating position where said wheeled device is self
supporting in a vertical orientation of said frame and a
second position where said frame is at an angle to a support
surface and said wheels have moved rearwardly away from said
end of said frame opposite said handles; and wherein
said frame supports an open top load carrying
container located generally within and behind said frame.
2. A convertible wheeled device as claimed in claim 1
wherein said device is a hand truck with a support plate
extending from said frame at said end opposite said handles.
3. A convertible wheeled device as claimed in claim 1 or
2 wherein said device includes a pair of lifting arms movable
to a position forwardly of said frame for suspending a load
between said support arms as said handles are moved
downwardly causing said arms to rise and suspend the load
therebetween.

4. A convertible wheeled device as claimed in claims 1, 2
or 3 including a control linkage for moving of said wheels
between said first and second positions.

5. A convertible wheeled device as claimed in claims 1,
2, or 3 including a control linkage for moving of said wheels
between said first and second positions and wherein said
control linkage forms a support leg arrangement rearwardly of


-15-



said wheels to support said convertible wheeled device in
said second position.

6. A convertible wheeled device as claimed in claim 5
wherein said linkage is an over center linkage having a bias
maintaining said linkage in the first operating position
unless moved by a user to cause the wheels to move towards
the second position.

7. A convertible wheeled device as claimed in claim 4
wherein said linkage is an over center linkage having a bias
maintaining said linkage in the first operating position
unless moved by a user to cause the wheels to move towards
the second position.

8. A convertible wheeled device as claimed in claim 7
wherein said wheels are movable to said second position after
a load has been positioned on said support plate and in said
second position the force of said load is primarily carried
by said frame.

9. A convertible wheeled device as claimed in claim 8
wherein the force of said load provides a bias moving said
wheels to said second position after said linkage has moved
through the center position of said linkage.

10. A convertible wheeled device as claimed in claim 2
wherein said support plate is pivotally secured to said frame
and movable between a storage position and an operating
position.

11. A convertible wheeled device as claimed in claim 10
includes means for locking said support plate in either said
storage position or said operating position.


-16-



12. A convertible wheeled device as claimed in claim 3
wherein said lifting arms are interconnected and pivotally
secured to said wheeled device adjacent said end of said
frame opposite said handles.

13. A convertible wheeled device as claimed in claim 12
wherein said lifting arms include means for maintaining said
arms in a storage position generally parallel to said frame
and movable to an operating position.

14. A convertible wheeled device as claimed in claim 13
wherein said lifting arms at free ends thereof including a
support arrangement for allowing suspension of load generally
centered between said free ends.

15. A convertible wheeled device as claimed in claim 14
said lifting arms are each slotted at the free end thereof to
engage a chain.

16. A convertible wheeled device as claimed in claim 15
including a chain and belt lifting arrangement, said belt
being adjustable for securing about a periphery of an object
to be lifted, said belt including two chains for engagement
with said lifting arms.

17. A convertible wheeled device as claimed in any one of
claims 1 to 16 wherein said device is a wheelbarrow storable
in a vertical orientation with said frame upright and said
wheels in said first position, said wheelbarrow in said
second position of said wheels being supported in a generally
horizontal orientation of said frame by means of said wheels
with said foldable legs extending downwardly relative to said
frame.


-17-



18. A convertible wheeled vehicle as claimed in claim 17
wherein said foldable legs are part of a control linkage
connected to and controlling the position of said wheels.
19. A convertible wheeled vehicle as claimed in claim 18
wherein said control linkage engages a stop member attached
to said frame.

20. A convertible wheeled vehicle as claimed in claim 1
wherein said vehicle is a hand truck operable in a
conventional manner with said wheels in said first position
and with said wheels in said second position said hand truck
supports a load positioned adjacent said end of said frame
opposite said handles in a counterbalanced manner.

21. A convertible wheeled device comprising an
elongate frame, a pair of coaxial wheels attached at one
end of said frame and movable between a first position
allowing vertical storage of said device partially
supported by said coaxial wheels and a second position
defining a wheelbarrow configuration of said device, a pair
of handles extending from said frame at an end thereof
opposite said wheels, an open top container located
generally within and behind said frame, and accessible
through said frame, foldable leg means attached to said
elongate frame and movable between a storage position
collapsed adjacent said elongate frame and an in use
position extending outwardly away from said frame.


-18-

Description

Note: Descriptions are shown in the official language in which they were submitted.


CA 02391204 2002-06-25
WH 11 671CA
TITLE: MULTI FUNCTION HAND TRUCK
FIELD OF THE INVENTION
The present application is directed to hand trucks
used to move a variety,of items. In particular, the
invention relates to an improved hand truck having a
series of operating modes.
BACKGROUND OF THE INVENTION
Two wheeled hand trucks are commonly ussd for
moving of refrigerators, stoves, boxes and other items.
These hand trucks typically have an upright frame with
two wheels located near the base of the frame and
slightly rearwardly thereof. Handles are provided at an
upper portion for tipping of the frame once the load has
been secured. A projecting plate is provided at the
bottom of the frame for placing of the load thereon. In
some cases the load can be merely tipped onto the frame
or in other cases straps are used to secure the load to
the frame such that it tilts with the truck.
These hand trucks come in various sizes and
qualities and have a primary use in association with
delivery services such as the delivery of boxes.
Attempts have been-made to make hand trucks of
this type suitable for other purposes and some of these
hand trucks have removable handles and an extra set of
wheels on the frame. The truck can then be converted to
a four wheeled wagon type structure for supporting
packages or boxes.
The structure of the pre ent invention allows the
hand truck to be used in a host of different
applications. In the preferred embodiment the hand truck
operates in at least three distinct modes however
- 1

CA 02391204 2002-06-25
WH 11 671CA
operation in, either of'these additional modes is also
valuable.
SUMMARY OF THE PRESENT'INVENTION
A convertible wheeled device for carrying a load
according to the present invention comprises an elongate
frame with a pair of 'handles extending from one end of
the frame and a pair of wheel pivotally secured either
side of the frame at an end thereof opposite said
handles. The wheels are movable between a first
operating position where the wheeled device is self
supporting in a vertical orientation of the frame and a
second position where the frame is at an angle to a
support surface and the wheels have moved rearwardly away
from the end of said frame opposite the handles.
According to an aspect of the invention, the
wheeled device is a hand truck with a support plate
extending from the frame at the end opposite the handles.
According to a further aspect of the invention,
the wheeled device includes a load carrying cavity member
interior to the frame and behind the frame.
In a further aspect of the invention, the device
includes a control linkage for moving of the wheels
between the ffirst and second positions.
In yet a further aspect of the invention, a
control linkage is provided for moving of the wheels
between said first and second positions and the control
linkage forms a support leg arrangement rearwardly of
said wheels to form a wheelbarrow type device.
Ln a preferred aspect of the device, the control
linkage is an over center linkage having a bias
maintaining the linkage in the first operating position

f
CA 02391204 2002-06-25
WH 11 671CA
unless moved by a user.to cause the wheels to move
towards the second position.
In a different aspect of the invention, the wheeis
are movable to said second position after a load has been
positioned on said support plate and in said second
position the force of said load is primarily carried by
said frame.
In a preferred a' pest of the device, in the second
position, said device can act as a modified hand truck
for carrying of loads to a front side of said frame and
can act as a wheelbarrow with a load being supported in
an open top container located behind said frame with the
open top of said container being accessible through said
f rame .
In a different aspect of the device, a pair of
lifting arms is provided. The lifting arms are movable
to a position forwardly of said frame for suspending a
load between said support arms as said handles are moved
downwardly causing said arms to rise and suspend the load
therebetween.
Preferably the lifting arms are interconnected and
pivotally secured to said wheeled device adjacent said
end of said frame opposite said handles.
In a further aspect of the device, the lifting
arms include a bias arrangement urging said arms to a
storage. position generally parallel to said frame.
According to an aspect of the device, a chain and
belt lifting arrangement is provided: The belt is
adjustable for securing about a periphery of an object to
be lifted and the belt includes two chains for engagement
with said lifting arms.
3 -

CA 02391204 2002-06-25
wH li s~lcA
In a preferred embodiment, he device is a
wheelbarrow which is storable in a vertical orientation
with said frame upright with said wheels in said first
position. The wheelbarrow in said second position of
said wYieels is generally in a horizontal orientation of
said frame with foldable legs extending downwardly
relative to said frame.
In a preferred aspect, the foldable legs are part
of a COn.trol linkage connected to and controlling the
position of said wheels.
In a different aspect of the invention, the device
is a hand truck operable i'n a conventional manner with
the wheels in the first position. With the wheels in
said second position, the hand truck supports a load
positioned adjacent the end of the frame opposite the
handles in a counterbalanced manner.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention shown in
the drawings wherein;
Figure 1 is a partial perspective view of the
mufti purpose hand truck;
'Figure 2 is a side view of the mufti purpose hand
truck;
Figure 3 is a perspective view of the dolly with
the wheels moved to allow use of the hand truck in a
wheelbarrow mode;
;Figure 4 is a rear view of the hand truck with the
wheels in the hand truck mode;
Figure 5 is a side view of the mufti purpose dolly
with the wheels being moved from a hand truck position to
the wheelbarrow position;
Figure 6 is a partial perspective view showing
details of the linkage used to support the wheels of the
hand truck and also showing details of the mounting of a

CA 02391204 2002-06-25
WH 1i 671CA
pair of lifting arms on either side of the hand truck
frame ;
Figure 7 is a side view of the hand truck with the
lifting arms moved forwardly and supporting a load at a
free end thereof;
Figure 8 is a partial perspective view showing the
support of the lifting arms on the support plate of the
f rame ;
Figure 9 is a partial perspective view showing;a
multi purpose hand truck acting as a storage truck for an
outboard motor;
Figure 10 is a perspective view showing a multi
purpose hand truck being used to support a bag for
containing yard waste;
Figure 1l is a side view of the mufti purpose
dolly in the wheelbarrow position;
Figure 12 is a perspective view of an alternate
embodiment;
Figure 13 is a front perspective view of the dolly
with a removable support plate; and
Figure 7:4 is a rear perspective view illustrating
storage of the support plate.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The mufti purpose hand truck as shown in Figures
1, 3 and 7 has three separate and distinct modes. The
hand truck as shown in Figure l is the conventional hand
truck mode where the hand truck 2 has a vertical frame 4
with a support plate 6 provided at the base of the hand
truck and a pair ofwheels 8 and 10 on either side of the
frame and adjacent to the support plate. Boxes,
refrigerators or other items can be moved by sliding of
the plate 6 beneath the'load and with the load contacting
the vertical frame 4. If desired, straps can also be
used to secure the load to the hand truck. The vertical
frame 4 has extending handles 24 and 26 which provide
additional leverage for tilting of the hand truck and
5 _

CA 0239120 4 2002-06-25
WH 11 671CA
supporting the load against the frame 4. This is a
standard use of a hand truck and it is normally the most
common use for hand trucks:'
The multi purpose hand truck 2 shown in Figure 3
is in the wheel barrow mode. The vertical frame 4 is now
generally horizontal. The frame diverges slightly towards
the extending handles 24 and 26 to provide spade between
handles 24 and 26 to allow a person to stand between the
handles, in the manner of a conventional open topped
wheel barrow. The hand truckincludes a load carrying
container 12 within the frame to function in the manner
of a conventional wheel barrow. This container can be
made of metal and inserted in the frame or welded thereto
or it can be a reinforced plastic or molded material. As
will be more fully explained, the wheels 8 and 10 are
moveable rearwardly by a control linkage and are
generally positioned below the cavity l2. Part of the
linkage forms the support legs for the wheel barrow.
Preferab3y, the container 12 terminates
approximately intermediate the combined length of the
frame 4 and the handles 24 and 26 and a wooden board 30
extends between the trames. This board provides a
support for one end of the container l2 and also provides
a support surface for an outboard motor as will be more
fully described in later-drawings.
The movement of the wheels 8 and 10 can be best
understood from a review of Figures 3; 4; 5 and 6. The
wheels are mounted on shaft 40 which passes through the
appropriate ports in the triangular members 42 and 44.
These triangular members are pivoted to the hand truck at
pivot point 46. The triangular plates 42 can move from
the hand truck position shown in solid lines in Figure 5
to the wheel barrow position shown ire dotted lines in
Figure 5.

CA 02391204 2002-06-25
WH 11 671CA
Each of the triangular plates has a control arm 48
attached thereto which is also pivotally secured to the
leg member 50 intermediate its length. The leg member 50
is pivoted at 52 to the hand truck. The linkage 48 when
the wheel is in the hand truck position of Figure 5 forms
an over centred type latch and the wheel 8 remains locked
in the hand truck position. To shift the wheels to the
wheel barrow position; the user grasps the pivoting legs
50 and pulls upwardly as shown in Figure 5. This causes
pivoting of the triangular plate 44 about pivot point 46
through the center point and movement of the wheels
rearwardly beneath the cavity 12. The triangular plates
44 and 42 each include a stop face 56. These act as
stops positioning the wheels iri the wheel barrow
orientation of Figure 3. The weight of the hand truck on
its own maintains the wheels in the position of Figure 3
during use and as such it also maintains 50 pivoting legs
in the position of Figure 3. Thus, the hand truck has
been converted to a wheel barrow having two wheels either
side of the container 12. The wheel barrow is converted
back to the hand truck merely by tipping of the wheel
barrow on end and movement of the legs to the position of
Figure 4. The linkage effectively forms an over center
linkage.
The movement of'the wheels between the two
positions has been described with respect to the control
linkage: Other arrangements for locking the wheels in
two or more positions are possible and movement of the'
wheels by means of the control linkage is only the
preferred embodiment.
The foldable legs for the wheelbarrow mode could
operate independently of the wheels. For example, each
leg could be pivotally movable from a storage to an in
use position.

CA 02391204 2002-06-25
WH 11 671CA
Figure 5 also illustrates a further uae of the
hand truck 2 where a load normally moved in the hand
truck mode is carried in the wheelbarrow mode. This is
accomplished by initially placing the load on the support
plate 6 and holding of the load by straps or other means
against the frame 4. The wheels of the hand truck are
released as the dolly is initially -.ipped rearwardly.
Further tipping of the frame causes the wheels to move to
the wheelbarrow position. The base of the frame 4 and
the wheels allow the hand truck to be stable or self
supporting with the frame at an angled position. The leg
members 50 are well above'the ground. The cross
connect'~.ng segment 51 can 'be used as a handle to pull 'the
linkage rearwardly past the center point as the hand
truck is tilted rearwardly. The load is now supported Qn
the, hand truck and the handles;are pushed downwardly to
allow transport. Once the user arrives at the desired
location, the hand truck can tip upwardly until the front
of the frame contacts the ground. It can stay in this
position until the load is to be unloaded. To unload,
the user merely tips the Band truck forwardly and the
wheels automatically return to the hand truck position
and lock in the over center position.
Therefore; the hand truck can be used in the
normal hand truck mode or it can be used in a modified
hand truck mode by allowing the wheels to move rearwardly
as the hand truck is tilted rearwardly. This provides an
in use conversion of the hand truck from a standard hand
truck mode to a modified hand truck vaheelbarrow mode.
This feature is useful in moving Large items such as air
conditioners. The storage at the angled position allows
the load to be maintained on the hand truck in a position
where it can easily be moved in contrast to a
conventional hand truck: This arrangement can be used
without the wheelbarrow capability. For example, a
dedicated hand truck which is convertible to this second
in use position is desirable for many delivery or moving

CA 02391204 2002-06-25
WH 11 671CA
applications.
Furthermore; once the Load is on the frame, and
the wheels moved iearward7y; the :hand truck can be used
in the wheelbarrow orientation. The legs 5O can support
the hand truck and any load applied thereto.
'Movement of the wheels rearwardly changes the
balance point of the hand truck. The hand truck with the
wheels moved rearwardTy and supported by the front edge
of the frame; is stable for most loads. Tilting of the
hand truck rearwardly initially requires a downward load
on the handles until a balance point is reached.
Further,, movement past the balance point requires a user
applied;ugward force on the handles. The force the user
must apply is more desirable 'due to the changing geometry
and change in the angle of the frame relative to the
Toad.
A further embodiment is shown in Figure 7. A pair
of lifting arms 16 are pivotally secured to the hand
truck and are moveable against spring bias to a load
carrying position shown in Figure 7. In this case, the
rear connecting bar l7 of the arms l6 engage the
downwarelly extending flanges 45 on the surface of he;
load cavity 12 and also engage the front edge of the
support plate 6. Notches 11 have been provided in the
support-plate 6 and engage complimentary members 19 on-
the bottom surface of the lifting arms l6. The lifting
arms 16 have a hand truck 24 and 26 of the hand truck and
provide considerable mechanical leverage for lifting of
the generally heavy load suspended in from of the hand
truck. The hand truck maybe moved towards the
appropriate planting location and the ball of the tree
lowered into the hole by allowing. the handle to move
upwardly.

CA 02391204 2002-06-25
WH 11 671CA
As shown in Figure 7, a spring 70 is connected to
the lifting arms l6: The opposite end of the spring is
attached to the pivot position 7l which supports one of
the plates 42 or 44: The spring 7O provides a bias to
bring the lifting arms back to the ~rertical orientation
shown in Figure 1. The spring is extended as the arms to
move to the load transfer position of Figure 7 and
provides a bias to return the arms to the stomge
position. A rubber stop 23 engages the frame and limits
movement of the arms:
In Figure 7, the arms are engaging the end of the
plate and are also engaging front f~.ce of the cavity l2.
The arms pivot about point 73 however, the load is
effectively being ransferred to the frame though the
cavity 12 and the support plate 6. 3t has been'found
that this arrangement is very effective for lifting of
heavy loads which are to be maintained in a generally
vertical orientation. As can be appreciated the chain
allows pivoting of the load. The chain and belt
arrangement allows suspens=ion of different loads. The
arms 16 include "U" shaped slots for engaging the chains
at different positions: This lifting arrangement also
has application for large cement pots with soil and
flowers or plants which are to be moved.
To use the, lifting"arms 16, the hand truck is
brought.up to the item to be lifted and the truck is
stood vertically a short distance from the item such as a
flower pot. The chain and belt arrangement 95 is secured
to the item. The arms 16 Can then be lowered by hand to
be located on either side of the item. The chains can
then be'releasably attached to the "U" shaped slots 97.
The hand truck may then be pivoted until the arms 16
engage the support plate 6: Further lifting of the hand
truck will start to lift the item whila allowing it to.
pivot and maintain a vertical orientation given the
weight is generally symmetrical with a low center of
10 -

CA 02391204 2002-06-25
WI-i 11 671CA
gravity (flower pot, tree with root ball, etc). The lift
is from either side of the item leaving the center
unobstructed which is particularly advantageous for
nursery stock and in use flower pots. The mechanical
advantage can be increased by extending the handles 24
and 26 or decreasing the arms 16. l~ 3 to 1 ratio is
easily provided and found to be satisfactory.
It is also possible to use the lifting arms with
the wheels moved to the rearward or second position.
Some mechanical advantage is Lost; however, the angel of
the frame has changed and may be more desirable to
maneuver, or easier for the user.
Figure 10 shows a further use of the hand truck.
Clip members 92 secured to the cross board 3Q are used to
engage an interior edge- of the recyclable compost bag
100. The bottom of the bag 10 is supported by the
support plate 6. Any refuse bag or container can be held
in this manner. Figure 9 shows the hand truck being used
for supporting the outboard motor 110. The support plate
6 provides a positive support to maintain the cart in the
vertical orientation for storage: The center of gravity
of the motor is genera7.ly above and aligned with the
board 30.
'Figure 12 illustrates an alternate embodiment
having a pivoting dollyplate 150 movable from the
operating position to a storage beneath and to the
exterior of the local cavity l2. The dolly plate 150 has
a sleeve bearing 152 mounted on tube 153 which forms a
lower portion of the frame of the hand truck. Carriage
bolts 158 and 160 pass through holes in the tube 153 and
lock the dolly plate in either the operating position
shown in Figure 12 or a storage position where-the dolly
plate is rotated counter clockwise and positioned beneath
the hand truck: Carriage bolts 158 and 160 are removable
to allow the dolly plate to be locked in one of the two
- 11

~ 02391204 2002-06-25
WH 11 671CA
positions.
Stub arms 154 and 156 are attached to vertical
portions of the frame 4. Thus, the upward angling of
stub arms 154 and 156 maintain engagement of the arms
when a:load is applied to the arms.
The pivoting plate 150 is moved to the storage
position leaving: the front of the hand truck unobstructed
by rotating counterclockwise and moving the lifting arms
16 forwardly to allow the dolly plate to clear the
connecting bar 17 which has moved rearwardly.
It is also possible to merely have a detachable
dolly plate which is releasably secured to the hand
truck. Preferably the dolly plate is stored on the hand
truck ready for attachment.
Figure l3 shows the mobile hand truck 2b where the
plate 6a is removably secured to the base of the frame 4.
Two holes 180 and 182 are provided on he frame and
receive hook extensions 184 aid 186 extending from the
rear edge 188 of the flange 7. The support plate is
.secured by tilting thereof, relative to the frame 4 and
inserting the hook extensions 184 and 186 into the holes
180 and 182. The support plate 6a is then pivoted to the
in use position.
Figure l3 also shows how the container 12 can
extend to the: cross member of the frame.
Figure 14 shows storage of the plate 6a to the
back of the wheelbarrow container l2. The support plate
includes a notch recess 19O and a hole 192 on the flange
7. The,notc,h recess is placed under the rearwardly
extending hook 194 which then overlaps with the flange 7.
The rearwardly extending hook limits pivoting movement of
the stored support plate when the dolly is in use as a
- 12 ''

CA 02391204 2002-06-25
WH 11 671CA
wheelbarrow or other lifting device. The hole 192 is
aligned with and inserted on the stud 196. Stud 196 has
a hole drilled therethxough for receiving the safety pin
198. Elongate projection 199 serves to space the support
plate 6 slightly off the bottom of the container 32.
This is preferable if the container is painted. The
elongate projection 199 can be shaped as a wedge to
provide an Znterferenee fit.
The removable dolly plate or the pivoting or
storing dolly prate is desirable when the hand truck is
primarily used as a vertically storing wheelbarrow and is
only in ended to be used as a hand truck occasionally:
Other arrangementslfor releasably securing and/or
movement of the dolly plate-betwem an operating position
and a storage position are possible and within the scope
of the present invention.:
The multi purpose hand truck 6 quickly converts
from the wheelbarrow mode of Figure 11 to the hand truck
mode of Figure 1. The wheel barrow mode of Figure 11
functions in a comparable manner with conventional wheel
barrows with the exception that it can be easily stored
vertically as a hand truck. Furthermore the wheels 8 and
l0 in the hand truck mode are positioned below and within
the depth of the cavity 12 providing further efficiency
in storage. Many homeowners need a wheel barrow but the
storage thereof is difficult. The present design
provides an effective splution to this problem.
The multipurpose hand truck Ei can be used as a
conventional hand truck or dolly and has a further
lifting and tran port arrangement using the lifting arms
16. Movement of the wheels rearwardly and the cavity 12
allows it to be used as a wheel barrow. Although all
three functions are de irable in the single design as
shown any two of thefunctions provide significant
13

CA 02391204 2002-06-25
WH 11 671CA
improvements over the prior art: For example, the hand
truck and lifting arms can be used with existW g hand
a trucks without the wheel barrow function. In this case,
the wheels do not need to more and the design is
simplified. Other arrangements for securing of the
lifting arms are also possible.
A wheel barrow which can easily be stored is also
po Bible with the present invention. Arrangements other
than the support plate 6 can. be used for rendering the
arrangement stable in the vertical storage orientation.
A wheel barrow and lifting arm structure provides a
structure particularly suited for gardening and lifting
applications around the home.
Although various preferred embodiments of the
present invention have been described in detail, it will
be appreciated by those skilled in the art that
variations may be made without departing from the spirit
of the invention or the scope of the appended claims.
14

Representative Drawing
A single figure which represents the drawing illustrating the invention.
Administrative Status

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Administrative Status

Title Date
Forecasted Issue Date 2011-05-24
(22) Filed 2002-06-25
(41) Open to Public Inspection 2003-12-25
Examination Requested 2007-05-24
(45) Issued 2011-05-24
Expired 2022-06-27

Abandonment History

There is no abandonment history.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Application Fee $150.00 2002-06-25
Maintenance Fee - Application - New Act 2 2004-06-25 $50.00 2004-05-03
Maintenance Fee - Application - New Act 3 2005-06-27 $50.00 2005-04-19
Maintenance Fee - Application - New Act 4 2006-06-26 $50.00 2006-05-12
Request for Examination $400.00 2007-05-24
Maintenance Fee - Application - New Act 5 2007-06-25 $100.00 2007-05-24
Maintenance Fee - Application - New Act 6 2008-06-25 $100.00 2008-06-25
Registration of a document - section 124 $100.00 2008-07-10
Maintenance Fee - Application - New Act 7 2009-06-25 $100.00 2009-06-19
Maintenance Fee - Application - New Act 8 2010-06-25 $100.00 2010-04-29
Final Fee $150.00 2011-03-03
Maintenance Fee - Patent - New Act 9 2011-06-27 $100.00 2011-05-24
Maintenance Fee - Patent - New Act 10 2012-06-26 $125.00 2012-06-21
Maintenance Fee - Patent - New Act 11 2013-06-25 $125.00 2013-06-21
Maintenance Fee - Patent - New Act 12 2014-06-25 $125.00 2014-04-02
Maintenance Fee - Patent - New Act 13 2015-06-25 $125.00 2015-06-10
Maintenance Fee - Patent - New Act 14 2016-06-27 $125.00 2016-06-10
Maintenance Fee - Patent - New Act 15 2017-06-27 $225.00 2017-06-23
Maintenance Fee - Patent - New Act 16 2018-06-26 $225.00 2018-06-22
Maintenance Fee - Patent - New Act 17 2019-06-25 $225.00 2019-06-25
Maintenance Fee - Patent - New Act 18 2020-06-25 $225.00 2020-05-26
Maintenance Fee - Patent - New Act 19 2021-06-25 $459.00 2021-06-02
Owners on Record

Note: Records showing the ownership history in alphabetical order.

Current Owners on Record
DORICK VENTURES LIMITED
Past Owners on Record
CELLI, GIULIANO
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.
Documents

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Document
Description 
Date
(yyyy-mm-dd) 
Number of pages   Size of Image (KB) 
Office Letter 2020-02-18 2 219
Change of Agent / Change to the Method of Correspondence 2020-05-27 4 91
Office Letter 2020-07-27 1 183
Office Letter 2020-07-27 2 220
Change of Agent 2020-08-25 5 1,458
Office Letter 2020-09-17 1 175
Office Letter 2020-09-17 1 176
Claims 2002-06-25 4 208
Representative Drawing 2002-11-20 1 8
Cover Page 2003-11-27 1 33
Abstract 2002-06-25 1 26
Description 2002-06-25 14 820
Representative Drawing 2011-04-26 1 9
Cover Page 2011-04-26 2 38
Drawings 2002-06-25 13 343
Claims 2010-05-05 4 149
Claims 2010-11-29 4 156
Assignment 2002-06-25 3 122
Prosecution-Amendment 2007-05-24 1 34
Correspondence 2008-06-25 1 15
Assignment 2008-07-10 3 63
Prosecution-Amendment 2009-01-15 2 57
Prosecution-Amendment 2009-07-15 4 160
Prosecution-Amendment 2009-11-05 2 52
Prosecution-Amendment 2010-05-05 6 234
Prosecution-Amendment 2010-07-05 2 52
Prosecution-Amendment 2010-11-29 6 202
Correspondence 2011-01-31 1 30
Correspondence 2011-03-03 1 38
Maintenance Fee Payment 2019-06-25 1 33