This application is directed to a cart, dolly or hand truck for transporting an item. More particularly, this application is directed to a cart, dolly or hand truck for transporting and lifting an item such as bucket.
Carts, dollies and hand trucks are very useful for moving items that are heavy and/or cumbersome. However, many cart designs have a number of disadvantages. For example, for particularly heavy items, the mere action of placing the item on the support platform of the cart may be difficult. Similarly, it may be difficult to remove a particularly heavy item from the support platform after it has been moved to the desired location. Depending on the desired final location of the item, moving the item to its final location may still require manually lifting the item. This is particularly true for elevated final locations, such as on a shelf or ledge.
It would therefore be advantageous to provide a cart, dolly or hand truck that is particularly well adapted to moving items, such as containers, including lifting and lowering those items as desired.
The present invention addresses the aforementioned need by providing a cart for lifting, moving and lowering an item, such as a bucket. The hand cart of this disclosure includes an engagement mechanism configured to engage the item being lifted by its sidewalls rather than its bottom surface. The cart of this disclosure also includes a vertical position adjustment mechanism, to lift and lower the item. The vertical position adjustment mechanism has a displacement multiplier that provides an advantage when lifting and lowering the item.
One particular set of embodiments of this disclosure is to a cart that has a vertical position adjustment mechanism that includes a displacement multiplier that results in a positional advantage. For example, the disclosure provides a transport cart comprising a frame having a first wheeled end and a second end, an engagement feature moveably connected to the frame, and a position adjustment system configured to adjust the position of the engagement feature between the first end and the second end of the frame, at least a portion of the position adjustment system moveable in relation to the frame. The engagement feature is configured to engage with an outwardly extending circumferential flange on a sidewall of the item, such as a bucket. The position adjustment system comprises a cable management system having at least one wheel, and a cable connected to the cable management system at a cable first end and to the engagement feature at a cable second end. Movement of the portion of the position adjustment system moveable in relation to the frame results in movement of the engagement feature. The position adjustment system may include a displacement multiplier.
As another example, the disclosure provides a transport cart comprising a frame having a first wheeled end and a second end, an engagement feature moveably connected to the frame, the engagement feature comprising two opposing arcuate arms, and a position adjustment system, with at least a portion of the position adjustment system moveable in relation to the frame. The position adjustment system comprises a displacement multiplier and a cable connected to the displacement multiplier at a cable first end and to the engagement feature at a cable second end.
These displacement multipliers may provide a displacement advantage of at least 1:2, of at least 1:4, of at least 1:8, among others.
Another particular set of embodiments of this disclosure is to methods of moving an item, such as a bucket. For example, this disclosure provides a method of moving a bucket by bringing a wheeled cart in close proximity to the bucket, engaging an outwardly extending circumferential flange on a sidewall of the bucket with an engagement feature of the wheeled cart by raising the engagement feature, tipping the wheeled cart to elevate the bucket, transporting the elevated bucket with the cart, leveling the bucket, and lowering the engagement feature to disengage the outwardly extending circumferential flange on a sidewall of the bucket.
In another example, this disclosure provides a method of moving a bucket by bringing a wheeled cart in close proximity to the bucket, engaging an outwardly extending circumferential flange on a sidewall of the bucket with an engagement feature of the wheeled cart, tipping the wheeled cart with the engaged bucket, transporting the engaged bucket with the cart, and untipping the cart to disengage the outwardly extending circumferential flange on a sidewall of the bucket.
In any of the methods of this disclosure, the item to be picked up may be located on the same surface as the wheeled cart, on a surface even with the surface on which the wheeled cart is, or on a surface elevated in relation to the wheeled cart. Additionally or alternately, the item may be deposited on the same surface as the wheeled cart, on a surface even with the surface on which the wheeled cart is, or on a surface elevated in relation to the wheeled cart.
The above summary of the various embodiments of the disclosure is not intended to describe each illustrated embodiment or every implementation of the disclosure. These and various other features and advantages will be apparent from a reading of the following detailed description.
The invention may be more completely understood in consideration of the following detailed description of various embodiments of the disclosure in connection with the accompanying drawings, in which:
While the disclosure is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the disclosure to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure as defined by the appended claims.
The present disclosure provides carts, dollies or hand trucks for lifting, transporting and an item or container, such as a bucket. The carts of this disclosure are particularly suited for lifting, moving, and lowering 5-gallon buckets and other items having an outwardly directed circumferential flange.
It should be understood that although the description herein refers to the device as a “cart”, the device may alternately be referred to as a “dolly”, “hand truck”, “hand cart”, “mover”, “2-wheeler”, “pallet truck”, etc. It should further be understood that although the description herein refers to the item moved by the cart as a “bucket” or “5-gallon bucket”, the cart can be configured to lift, transport and lower other items.
The carts of this disclosure include a lifting system that raises and lowers the item. The lifting system includes an engagement feature and a position adjustment system. The position adjustment system includes a feature that provides a positional advantage for lifting and lowering the engaged item. The position adjustment system includes a displacement multiplier.
In the following description, reference is made to the accompanying drawing that forms a part hereof and in which are shown by way of illustration at least one specific embodiment. The following description provides additional specific embodiments. It is to be understood that still other embodiments are contemplated and may be made without departing from the scope or spirit of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense. While the present disclosure is not so limited, an appreciation of various aspects of the disclosure will be gained through the discussion provided below.
Referring now to the figures, various carts and features according to the present disclosure are illustrated in
In
At first end 14, cart 10 includes two wheels 18 upon which cart 10 can roll. In
Engagement feature 22 is configured to engage sidewalls or an element present on the sidewalls of an item (e.g., a circumferentially outwardly extending flange on a 5-gallon bucket) and support the item. In the illustrated embodiment, engagement feature 22 does not fully encircle the bucket, but encircles the bucket only so much as to sufficiently secure the bucket against cart 10 when cart 10 is tipped while allowing the bucket to be slid into and out from engagement feature 22, without the need to open clasps, straps, buckets, or the like when cart 10 is not tipped. In other embodiments, a removable or replaceable strap or other mechanism may used to better secure the bucket into engagement feature 22.
As seen in
Engagement feature 22 is moveably mounted to frame 12, moveable between first end 14 and second end 16. In one embodiment, engagement feature 22 is mounted to frame 12 via compliant guide rollers, having some amount of slack or play. Such compliant rollers may slightly pivot in relation to frame 12, facilitating correct positioning of upper member 24 of engagement feature 22 against the item to be engaged.
Position adjustment system 28 is operably connected to and configured to raise and lower engagement feature 22. Position adjustment system 28 has a displacement multiplier that provides a displacement advantage for raising and lowering engagement feature 22 in relation to frame 12. By use of the terms “advantage,” “displacement advantage”, and variations thereof, what is intended is, for example, vertical motion of one unit due to the direct action of the cart user will result in movement of the engagement feature of more than one unit. For cart 10 of
Also shown in
Wheel 36 has a greater diameter (and thus circumference) than gear 32, so that in accordance with this disclosure, wheel 36 is a displacement multiplier. Because the circumference of wheel 36 is greater than the circumference of gear 32 to which it is locked, the same angle of rotation will produce a greater distance with wheel 36 than with gear 32. Thus, when hydraulic cylinder 31 via lever 30 moves gear 32 so that it travels one distance unit (e.g., inch) along rack 34, wheel 36 will move cable 38 and thus engagement feature 22 more than that one unit.
The displacement advantage provided by wheel 36 results in greater than a 1:1 movement of engagement feature 22 in relation to rack 34, in some embodiments greater than 1:2 (meaning, one distance unit of movement of gear 32 results in greater than 2 distance units of movement of engagement feature 22). In some embodiments, the ratio of movement is greater than 1:3, in other embodiments greater than 1:4, in other embodiments greater than 1:5, and in other embodiments greater than 1:6 or greater than 1:8. The displacement advantage realized is based on the relative radius of gear 32 to the radius of wheel 36; that is, the displacement advantage realized is a ratio of the radius of gear 32 to wheel 36.
The lifting system includes a position adjustment system 128, shown in
In the illustrated embodiment, position adjustment system 128 provides an 8× displacement advantage due to the eight loops of cable 142. Thus, a change in distance between first end 146 and second end 148 results in a movement 8 times as much for the opposite end of cable 142. For example, an increase of 1 inch between first end 146 and second end 148 results in engagement feature 122 being lifted 8 inches.
The illustrated pulley system 140 is a compound system with eight loops, and it should be understood that other pulley systems, providing more or less displacement advantage, could be used.
Returning to
The angle of kick plate 40 in respect to frame 12, although locked during use of cart 10, can be adjustable to modify the tip of cart 10 as desired. In
Cart 200 includes a pivotal kick plate or foot rest 240 to facilitate tipping or tilting cart 200 back toward the user during movement or transport of cart 200. Positioned on the bottom side of kick plate 240 are casters 242. Kick plate 240 includes a slot 245 therein, slot 245 having a first end 246 and an opposite second end 248. Fixedly connected to frame 212 is a pin 250 that fits within slot 245. As pin 250 moves in slot 245, the angle between kick plate 240 and frame 212 changes, thus modifying the angle of possible tipping of cart 200. In
The carts of this disclosure (e.g., cart 10, cart 100, cart 200) may include any number of various features to limit the movement of the item or bucket engagement feature (e.g., feature 22, 122, 222) along the cart frame (e.g., frame 12, 112, 212). Referring to
Returning to
As indicated above, the various carts of this disclosure can be used to lift, transport, and lower items, particularly buckets.
First, as illustrated in
In
In
In
In another alternate method, the bucket may be lifted (in a manner similar to illustrated in
In some methods, it may not be necessary to activate the position adjustment system of the cart. Merely tipping the cart back may be sufficient to raise the bucket sufficiently so that it can be moved. Similarly, merely tipping the cart forward may be sufficient to release and deposit the bucket in the desired location.
Thus, various embodiments of the TRANSPORT CART are disclosed. The implementations described above and other implementations are within the scope of the following claims. One skilled in the art will appreciate that the present invention can be practiced with embodiments other than those disclosed. The disclosed embodiments are presented for purposes of illustration and not limitation, and the present invention is limited only by the claims that follow.
This application claims the benefit of U.S. Provisional Application No. 61/731,167 filed Nov. 29, 2012, the entire contents of which is incorporated herein by reference for all purposes.
Number | Date | Country | |
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61731167 | Nov 2012 | US |