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Wheelbarrow.
AP19A
ARIPO
- Inventor
Pierre Donze Jean-Pierre Franck
Worldwide applications
Application APAP/P/1986/000047A events
1986-08-01
1988-04-26
Application granted
1988-04-26
Description
translated from
The present invention relates to wheelbarrows ior transporting relative small loads.
Conventional wheelbarrows comprise a frame with two spaced arms defining handles, supporting legs and a wheel assembly located at the forward end of the wheelbarrow.
This type of wheelbarrow has a number of drawbacks for the user. First of all, the user must lift and carry at least about one-third of the load because of the location of the bearing zone of the wheel or wheels of the wheel assembly on the ground. Another drawback is related to the fact that since the wheel assembly is determined once and for all the use of the wheelbarrow is inconvenient on certain types of ground or terrain ( grass, gravel, sand or mud). Finally, known wheelbarrows have only a single stable position which is defined by the supporting legs. It is, however, often inconvenient to store a wheelbarrow in this position.
The various drawbacks of prior art wheelbarrows are disclosed namely in British patents 6,788 and 608,297 and U.S. patents 1,572,531 and 4,252,334. In all these prior art documents the wheel assembly and the container or barrow have a relative position such that the center of gravity of the barrow is always longitudinally offset relative to the wheel assembly which precludes good balance of the wheelbarrow. Moreover, no means has been proposed to adapt a wheelbarrow to different kinds of ground or
APOOOO 1 9 ^original Jj) terrain. ·
An object of the invention is to overcome the various above-mentioned drawbacks .
According to the invention there is provided a wheelbarrow comprising a frame having two arms defining handles, supporting legs, a load container and a wheel support structure including a wheel axle, characterized in that the center of gravity of the container is located substantially in vertical alignment with the axle in the operative position of the wheelbarrow, the axle being removably mounted in two bearings, and an abutment member disposed at the front of the wheelbarrow and extending transversely to each side of the longitudinal center line of the wheelbarrow.
According to another feature of the invention the wheel axle is adapted to accommodate different arrangements of wheels, stop means for releasably securing the wheels of a selected wheel arrangement in position on the axle.
According to another aspect of the invention the abutment member is suitably aligned with the forward edge of the container to define a stable storage position in which the abutment member and the front edge bear on the ground .
The present wheelbarrow has numerous advantages.
- It has a normal operating position in which the force necessary for lifting and transporting the load is minimized owing to the substantially vertically aligned bad original position of the wheel axle relative to the center or gravity of the container.
-It is adaptable to the all kinds of ground or terrain since it may be equipped with different wheel arrangements with the wheels at desired locations on the axle and easily demountable.
-Thanks to its forward abutment member it permits easy discharge of the load both forwardly and laterally and defines a novel stable storage position which reduces its storage surface area and facilitates cleaning of the barrow and maintenance and changing of the wheel arrangement.
These and other features and advantages will become apparent from the description which follows with reference to the accompanying drawings given by way of example.
Fig. 1 is a pespective view of the wheelbarrow embodying the present invention;
Fig. 2 is a front end elevationai view of the wheelbarrow of Fig. 1;
Fig. - 3 is a side elevationai view of the wheelbarrow of Fig. 1;
Figs. 4-7 are respective partial bottom plan views for three different wheel arrangements; and
Fig. 8 is a side elevationai view showing the wheelbarrow in its vertical storage position.
Reference will be first had to Figs. 1-3 which show the wheelbarrow comprising a chassis or frame 1a, two arms
AP 0 0 0 0 1 9 BAD original
defining handles, supporting legs 2, antainei 10 and a wheel support structure including an wheel'axfe 6supporting two wheels 8. The two arms 1 defining handles extend from the frame 1a are angled outwardly and upwardly and terminate by two hand grips 15 which are generally parallel to the. ground when the wheelbarrow is in its horizontal rest position as illustrated in Fig. 3. The container 10 is removably mounted on the frame 1a by means that are not illustrated.
The frame 1a has two substantially parallel arms 16 extending forwardly of the container 10. The free ends of the arms 16 are welded to a transverse abutment member 5 which extends transversely to the respective sides of the arms 16. Arms 16 are slightly bent or curved towards the ground so that the abutment member 5 is located
. member 5 and wheel axle are parallel to each other.
The wheel support structure 3 located below the frame 1a includes an angle member having two arms 3a,3b at each «side of the container. The end of first arm 3a is welded to the frame 1a whereas the end of the second arm
3b is welded to the abutment members 5. Each angle member 3 supports a bearing 4 at the intersection of its arms. The bearings 4 are in alignment so as to journal the axle for the wheels 8. The wheel support structure 3 is located under the frame 1a so that the axle 6 is substantially in vertical alignment, that is vertically beneath, the center
BAD ORIGINAL of gravity of the container 10 whan the wheelbarrow is in its operative position .
The forward edge 10a of the container 10 is substantially in vertically alignment with the abutment member 5 in the horizontal rest position shown in Fig. 4.
Referring- to Fig. 2 it is noted that the axle extends beyond the two bearings 4 so as to be adapted to support at least one outer wheel adjacent each of the ends of the axle 6 and so that the transverse abutment member 5 is substantially as long or slightly longer than the axle δ whereby the hubs of such outer wheels are substantially in alignment with the free ends of the axle 6 as seen in Figs.
5-7.
The frame 1a has two supporting legs 2. In the illustrated embodiments each supporting leg 2 is generally V-shaped. The base of the V-shaped legs 2 define bearing surfaces and the free ends of the V-shape are joined, for exemple welded, to the frame 1a.
Reference will now be had to Figs 4-7 which show in detail1 the various wheel arrangements. In these various wheel arrangements the wheels 8 are always freely mounted for rotation by means of ball bearings and slidably mounted on the axle 6 for adjusting the position and spacing of the wheels. Once the lateral position of each wheel 8 has been selected by the intermediary of releasable sliding stop means 7 fixed in position by screws 7a for example.
In the Fig. 4 embodiment the axle 6 carries two
HP o 0 0 0 1 9 BAD original wheels 8 located between two bearings 4. Each wheel 8 is held in position on the axle 6 by the intermediary of · releasable sliding stop means 7 which are located in the vicinity of the bearings 4.
In the Fig. 5 embodiment two such wheels 8 are mounted outside the bearings 4 on the terminal or outside portions of the axle 6 . Each of the wheels 8 is in this case held by a cotter pin 9 received in a through hole 9a located proximate to the corresponding end of the axle 6. Inwardly of the wheels 8 are stop means 7 bearing against the adjacent bearing 4. The same arrangement is provided in the Fig. 6 embodiment where a third wheel 8 is located by two spaced stop means 7 at the middle of the shaft 6.
In Fig 7. the shaft 6 carries two inner wheels 8 arranged as shown in Fig. 4 and two outer wheels 8 arranged as shown in Fig. 6.
The various wheel arrangements of Fig. 4-7 have the advantage of stop means 7 (Fig. 4) and stop means 7 and cotter pins 9 ( Figs. 5-7) which maintain the shaft 6 in position without necessitating additional fastening means.
The selection of the various possible wheel arrangements as to number and position of the wheels adapts the wheel assembly of the wheelbarrow to various conditions of use and particularly to differents kinds of ground or terrain. In case of a loose ground such as gravel the three-wheel configuration of Fig. 6 can be advantageously adopted. The four-wheel arrangement can be adopted for use
BAD ORIGINAL Q on grounds which are more difficult such as mud or grass and the like.
Fig. 8 illustrates the vertical storage position of the wheelbarrow in which the wheelbarrow bears on its abutment member 5 and the forward edge 10a of the container 10. This storage position facilitates in particular cleaning of the container, maintenance, adjustment and changing of the wheels. The abutment member 5 offers the great additional advantage of facilitating the discharge of the load both forwardly and sideways with minimum force and maximum security because of the fulcrum defined by the abutment member. It will be understood that for lateral or sideways discharge of the container 10 the corresponding end of the abutment member 5 defines the bearing support or fulcrum.
The handles are preferably of the telescopic variety. To this end each handle has a tubular member 12 slidably mounted on each fixed arm 1. The tubular members 12 and the arms 1 are provided with registrable holes 13 so as to permit _the tubular members 12 to be fixed relative to the arms 1 by the agency of cotter pins 14 for example. The telescopic adjustment of the length of the tubular members 12 permits the height or position of the hand grips 15 to be adjusted depending on the stature of the user so as to avoid an uncomfortable working position.
It will be understood from the foregoing description that the present invention combines a number of
AP 0 0 0 0 1 9 !Bad original
- jsp increasin'·’ uc· + r advantages which has the effecr of efficiency while improving his comfort. These include· reducing the maximum weight to be lifted by the user ;
- making the wheelbarrow adaptable to the nature of the ground or terrain on which it is to be used;
stabilizing the discharge positions of the wheelbarrow; and facilitating cleaning _and maintenance of the wheelbarrow as well as its storage.
It will be understood that the invention is not intended to be limited to the details of the particular embodiments given by way of example. Rather, various alternatives and modifications may be made within the scope of the inventions as defined by the appended claims. Thus .Ώ the releasable stops means may be of various types and configurations. Different types of handles may be contemplated in lieu of the telescopic handles. Welded connections may be replaced by releasable fastening means in particular for the supporting legs.
Claims (7)
Hide Dependent
translated from
Claims (7)
Hide Dependent
translated from
- A wheelbarrcw comprising a frame having two arms defining handles, supporting legs a load container and a support structure for wheels on an axle removably mounted in two bearing adapted to maintain in the operative position the said axle substantially in vertical alignment with the center of gravity of the container, and the said support structure has at its forward end an abutment member extending transversely to each side of the longitudinal center line of the wheelbarrow.
- 2. A wheelbarrow according to claim 1, wherein the wheel axle is adapted to accommodate different arrangements of wheels, stop means for releasably securing the wheels of a selected wheel arrangement in position on the axle.
- 3. A wheelbarrow according to cla im 1 or 2, wherein the abutment member is suitably aligned with the forward edge of the container to define a table storage position in which the abutment member and the front edge bear on the ground.
- 4. A wheelbarrow according to any one of the preceding claims, wherein ' the handles are telescopic for adjusting the height of hand grip portions thereon.
- 5. A wheelbarrcw comprising a frame having two arms defining handles, two supporting legs, a container, and a supporting structure for a wheel axle, characterzied in that the frame has two arms extending forwardly to a transverse abutment member substantially in vertical alignment with a forward edge of the container and substantially in horizontal alignment with the axle in the horizontal rest position of the wheelbarrcw, the abutment member and the forward edge of the container defining a stable vertical storage position of the wheelbarrcw.
- 6/..BAD ORIGINAL6. A wheelbarrow according to calim 5, wherein the abutment member is rectilinear and parallel to the wheel axle, the abutment member being substantially the same length as the axle.
- 7. A wheelbarrcw according to claim 5 or J, wherein the wheel axle comprises an inner portion disposed between two bearings and outer portions extending beyond the inner portion, and means for releasably securing wheels on selected portions of the axle.BAD ORIGINAL $