Patent Grant
6976719
Not Applicable
1. Field of the Invention
The invention relates to a strap having male and female end locking portions that can be manually secured so that the strap forms a closed loop, and handle portions that can be manually coupled in-situ to form one or more handles to facilitate manually lifting and carrying an object placed within the loop.
2. Description of the Related Art
It is necessary in many environments, to lift large, sometimes cumbersome objects manually, in the absence of machinery to perform such a task (such as a crane or forklift). Additionally, some objects, while heavy or awkward, may be too small to justify the use of a machine (such as a forklift) or are required to be moved in areas inaccessible to a machine, thus typically being left to be handled manually by a worker.
For example, in a farm environment, while many chores can be at least partially automated, much manual labor is still typically required, such as moving objects from vehicles to a storage facility or vice versa. Some objects that may typically be used in such an environment, (such as a bucket), comprise integral handles of varying types to facilitate manual handling of the object. However, many tasks about an agricultural or industrial environment may require handling bulk materials, in a box, sack, or the form of a roll or cylinder just to name a few. Bulk materials in forms such as this can quickly become unwieldy, which makes the task for a worker more difficult and more dangerous. Stooping down to ground level to pick up a sack or roll of material will almost without doubt place a worker in a position in which he or she is at an increased risk for causing a painful injury in his or her back, or other part of his or her body. Any means for improving the difficulty, comfort and safety levels of such a chore is desirable.
A number of devices for either carrying and/or bundling objects are known. U.S. Pat. No. 5,695,234 to Coticchio et al. describes a carrying device for shopping bags consisting of “loop forming element” (10) and two handles (12, 14) having gripping portions (22 and 22′) arranged on the longitudinal ends of the strap portion. The two handles mate with each other via projections 18 and sockets 24 (FIG. 3) or a handle is inserted into a hole to form a noose around an object (FIGS. 10 and 11). The handles described by Coticchio are pre-formed, prior to use.
U.S. Pat. No. 3,493,154 to Engle describes a flexible package carrying strap having a relatively wide width, but manufactured from one piece of material. There is a single handle on the strap of Engle, pre-formed at a longitudinal end of the strap. Adjustability is provided by multiple slots at one end into which the handle end fits.
U.S. Pat. No. 4,558,896 to Farnworth describes a handle for attachment to a load the handle having an open slot (28) for receiving a T-bar (26). The slot (24) is provided to allow the strap portion (12) to curve when in use (
U.S. Pat. No. 4,514,876 to Houlberg describes an injection moulded bag closure having two handle portions (3, 4) attached to bag-carrying bars (1a, 1b). The handles of Houlberg lock together (
U.S. Pat. No. 5,735,019 to Kerr et al. describe an assist handle to aid a user in carrying bags (such as Coticchio, above), having sling portion (10) across which bag handles lay. Handle cut-outs (17) are formed in longitudinal ends of the sling (10). A grip (40), is used to make using the device more comfortable, and to hold the two ends of the sling (10) together.
U.S. Pat. No. 5,715,578 to Knudson describes a bundle tie having a rubber band loop (5) and one bar-shaped handle (3) arranged at one end of the loop (5). The handle of Knudson is a rigid bar, and the Knudson device ties by looping the handle (3) through the loop (5).
U.S. Pat. No. 5,005,891 to Lunsford describes a bag handle apparatus with a purpose similar to that of Kerr and Coticchio. Lunsford's device comprises a relatively wide sheet (22) to distribute the weight of a load across a user's hand. Bag handles are placed in a center portion of the sheet and the sheet is wrapped around the bag handles. The entire device acts as a cushion, and does not have any distinct handle.
U.S. Pat. No. 5,096,248 to Ryan describes a bundling handle having a strap portion (11) and grip portion (8), among other features. The handle is used in a manner much like the bundling tie of Knudson (described above), in that the device attached to itself by looping around and through itself (FIG. 4). A user lifts the device by inserting his or her hand into a pre-formed slot (17), which is arranged at a longitudinal end of the bundling handle of Ryan.
U.S. Pat. No. 4,696,505 to Shadoan describes a handle and strap apparatus for hand-carrying articles. Shadoan has a strap portion that can be looped around various sizes and shapes of objects. The strap portion of Shadoan is a separate piece from the rigid handle portion, and connects to the rigid handle (10), which is arranged at an end of the strap portion, by looping through openings (34, 36) therein.
U.S. Pat. No. 6,062,622 to Susman et al. describe a handle clasp for bags consisting of a strap forming a loop around bag handles to be carried, the strap having a wider, in-line handle region (20), where it is held by a user, the handle region being pre-formed, prior to use.
U.S. Pat. No. 1,829,613 to Sato describes a fastener, particularly for fastening stacks of material such as paper. Sato's fastener includes an elongate body with a single male portion and a mating head having a series of transverse slots for receiving the male portion. These multiple slots allow the length of the fastener to adjust to an appropriate size. Sato suggests the use of a malleable metal for his fastener.
U.S. Pat. No. 3,913,179 to Rhee simply describes a tie strap without a handle, having a plurality of slots and tabs, incorporating T-slots 44, 46 and 48.
U.S. Pat. No. 487,145 to Gibbons describes a halter for a horse that includes a strap (f), a distal T-head (k) and linear slots (l) to increase of decrease the length of the strap (f).
U.S. Design Pat. No. 252,741 to Taylor is a U.S. design patent that shows a tie strap without a handle, apparently having a plurality of linear longitudinal holes and two identical angled ends. It appears as though there would be two possible manners in which to affix the ends to a longitudinal hole, if desired. The smaller, most distal protrusion could act as a temporary fixing means that is more easily removed than the triangular portion, which could act as a barb and lock the sections together.
Many people have a need for a simple and inexpensive way to handle bulky objects such as rolls of material, since even a simple roll of plastic can weigh upward of 100 lbs. Thus, a device to facilitate handling of rolls of material, or other objects, that is small and inexpensive enough to be included with a roll of material or other object, is desired.
The invention relates to an adjustable carry strap and handle for facilitating the lifting of an object, such as a roll of material. Additionally, the invention facilitates the bundling of materials. The carry strap and handle includes an elongated and substantially planar strap, having first and second ends, with one end having one or more longitudinally spaced coupling portions. In some embodiments, each coupling portion extends from opposed lateral sides of the second end of the strap, and the first end terminates in a female portion having an aperture adapted to serially receive locking portions of the second end of the strap portion. In these embodiments, each of the coupling portions, when inserted into the aperture, is capable of detachably engaging a portion of the female portion near the aperture.
The carry strap and handle also includes a pair of laterally-protruding handle halves. Depending on the embodiment, each handle half extends from opposed lateral sides of the strap, and is substantially symmetrical to the other about a longitudinal axis of the device. Each handle half has a U-shape with two or more connecting portions that are substantially perpendicular to the longitudinal axis of the strap, and one grip portion that is arranged between the two connecting portions. The grip portion is laterally spaced from the lateral edge of the strap. This positioning forms a space large enough for a hand to fit into and grip the handle. The handle halves initially are coplanar with the strap and the two laterally opposed handle halves are adapted to fold together in-situ to an upright position to form the handle for the strap.
Benefits to using the subject carry strap and handle include increased ease, comfort, stability and safety of an object to be carried, on the part of the user. If an object to be carried does not normally include a handle, one can easily be affixed to the object through use of the subject carry strap and handle. Accordingly, objects such as rolls of knitted netting or film having widths larger than a typical arm span of a user, that as a result are typically awkward to handle, become less awkward. Accordingly, a user will find a decreased need to place his or her body in a position likely to cause harm. This is important, especially considering the heft of objects often handled manually. Users handling of rolls of material, cylinders of compressed gas, sacks, crates, boxes, tubes, pipes, bundles, and individual items (a section of a log, for instance) can all benefit from the subject carry strap and handle.
Additional features and embodiments of the invention are discussed in detail below, with reference to the Figures.
The adjustable carry strap and handle 100 includes an elongated and substantially planar strap portion 110. In one embodiment, the second end has one or more longitudinally spaced male coupling regions 120, with each coupling portion extending from opposed lateral sides 111 of the second end of the strap portion 110. In this embodiment, the first end terminates in a female portion 150 having an aperture 130 adapted to serially receive the male coupling region(s) 120 at the second end of the strap. Each of the coupling portions 125, when inserted into the aperture 130, is capable of detachably engaging a portion of the female portion 150.
As seen in the embodiments
When the mating male coupling region 120 and female coupling portion 150 comprise protuberances such as male coupling portions 125, that have a width wider than the location of the aperture in which the male coupling portions 125 ordinarily reside. Accordingly, when inserted into the aperture 130 of the female portion 150, the relatively wide male coupling portions 125 prevent uncoupling of the male coupling region 120 and the female portion 150. For example, in embodiments having substantially T-shaped apertures 130 and a male coupling region 120 having male coupling portions 125, the steps for attachment are typically as follows. First, the male coupling region 120, is rotated so as to align with the longitudinal portion 135 of the aperture 130, and is inserted into the aperture 130. The male coupling portions 125, while inserted in the longitudinal portion 135, is rotated into alignment with the perpendicular portion 131 of the aperture 130. In this position, and with the strap in a state of tension, a first edge of the male coupling portions 125, abuts against the face of the female coupling portion 150 in regions to the side of the perpendicular portion 131. Since the length of the longitudinal portion 135 is typically greater than that of the perpendicular portion 131, the male coupling region 120 is more easily inserted into this region and is more difficult to remove from the perpendicular portion 131, once fully inserted. Also, since typically, the perpendicular portion 131 is approximately the same width of the strap portion 110, and the width at the male coupling portions 125 is larger than that of the perpendicular portion 131, resistance to pull-out is achieved.
The carry strap and handle 100 may be removed from the object to be carried by any of a variety of means, including cutting a portion of the carry strap and handle 100 or by disengaging the male and female portions 125, 150 in an order that is the reverse of that to attach the male and female portions 125, 150.
The male coupling region 120 at the second end of the strap may, in alternate embodiments, comprise other means for attachment to the first end of the strap and/or female portion 150. In this case the sense of the terms “male” and “female” refers to two regions that are joined together. Such other means for attachment may include a buckle, snaps, hook-and-loop fasteners, staples, adhesive or any other practical means. Alternatively still, attachment of the first and second ends may be achieved with no additional component, for example, by welding, heat-welding, solvent-welding, or crimping the two ends together, depending on the particular embodiment.
In almost any embodiment, the carry strap and handle 100 can be configured to fit about two or more pre-selected circumferences of objects. For example, if a manufacturer sells rolls of material in varying amounts, say 100 yard and 300 yard rolls, then, naturally, the diameters and circumferences will be different. If the subject carry strap and handle 100 is to be used in this situation, then adjustability of the carry strap and handle 100 must be provided. One manner in which this need may be met is to include a series of male coupling portions 125 or protuberances on the second end of the carry strap and handle 100. Each male coupling portion 125 allows coupling of the male and female coupling portions 125, 150 at that point. Since any one diameter object to be lifted necessitates a particular length of strap portion 110, if objects will be selected from two objects each having a different diameter, then only two coupling locations may be necessary. Thus, two or more sets of male coupling portions 125, each longitudinally spaced with respect to the longitudinal axis of the strap portion 110, be used to determine the location at which the first and second ends of the carry strap and handle 110 will attach (and the resultant circumference of the strap). The positions of these tabs will typically correspond to the circumference(s) of objects to be lifted.
Furthermore, male coupling portions 125 may be arranged in groups about two or more pre-selected longitudinal positions. That is, instead of just one pair of male coupling portions 125 near each position, multiple pairs of male coupling portions 125 may be arranged at each location. In this embodiment, additional tabs provide a tolerance for varying roll circumference. So, while a full range of male coupling portions 125 may not be needed, a desired level of adjustability is still achieved. without unnecessary material expense. It is to be understood that principles of the foregoing example embodiments, in which different arrangements of male coupling portions 125 are discussed, can be applied to alternate means for securing the first and second ends of the carry strap and handle 100 to each other (Such as snaps, hook-and-loop fasteners, etc.).
Alternatively, two or more apertures 130 may be included on an enlarged or on multiple female coupling portions 150. As such, adjustability is provided. Yet further, the carry strap and handle 100 may be arranged such that it comprises a plurality of male coupling regions 120 and a plurality of female coupling portions 150. Thus, the particular means by which adjustability is achieved may be selected by the user, and if desired, two or more male and female coupling portions 120, 150 may be utilized at the same time to provide a redundant connection for safety reasons and/or to increase the carrying capacity of the device by distributing the stresses at one connection over a plurality of connections.
The carry strap and handle also includes a pair of laterally-protruding handle halves 140. Each handle half extends from opposed lateral sides 111 of the strap 100, and is substantially symmetrical to the other about a longitudinal axis of the strap 100. The handles preferably lay flat prior to use and when not in use for space savings, and to facilitate stacking of the straps 100 themselves and/or objects held by the straps 100.
Each handle half 140a,b may have a U-shape with two or more connecting portions 148 that are substantially perpendicular to the longitudinal axis of the strap, and one grip portion 149 that is arranged between the two connecting portions 148. The grip portion 149 is laterally spaced from the lateral edge 111 of the strap portion 110. This positioning forms a space 147 large enough for a hand to fit into and grip the handle 140.
Alternatively, the handle halves 140a,b may comprise T-shaped handle portions connected to the strap by a single, centrally located connecting portion. With this embodiment, a user's fingers sit to each side of the connecting portion, rather than in-between two connecting portions, as with the above embodiment. Alternatively still, the handle halves 140a,b may comprise loops to enable a user to grip the carry strap and handle, and the object to be lifted or semi-annular sections consisting of a generally arcuate handle halves attaching at each end to the strap. Such loops and semi-annular sections, U-shape and T-shape handles may be integrally formed with the strap itself or may be made from an additional component that is later attached to the strap portion 110. Also, the handle halves 140a,b may be made from a string-like material such as a rope that is attached to the strap portion 110 via eyelets in the strap portion 110. Of course, other shapes for the handles 140 are possible, though not specifically described herein.
In each embodiment, the handle halves 140a,b initially are coplanar with the strap portion 110, and the two laterally opposed handle halves 140a,b are adapted to fold together in-situ to an upright position to form the handle for the strap. In the case of U-shaped handle halves, for example, one or more creases 540
The handle halves 140a,b may be located near the first end of the strap portion 110, near the second end of the strap portion 110, or at an intermediate location between the first and second ends of the strap portion 110.
Depending on the embodiment, the handle 140 may comprise a flange portion 460 about one or more edges of the handle to provide increased rigidity and comfort for the user. Such a flange portion 460 typically includes a narrow band of an increased thickness along the edge of the handle. The additional material spaced from the middle of the handle helps resist bending stresses in and resulting deformation of the handle 140. The flange portion 460 may be located along an outer contour of the handle 140 and/or along the inner contour 440 of the handle 140.
When using the carry strap and handle 100, a user lifts each handle half 140a,b from a normally flat position. If multiple carry strap and handles 100 are used, a user will typically grip one pair of handle halves 140a,b in each hand, and lift the object. If the carry strap and handle 100 is embodied such that the spacing between each handle half 140a,b is relatively large and/or if only one carry strap is used, the user will typically grip one handle half 140a,b in each hand, and lift the object.
In some embodiments, the grip portion 149 of the handle 140 has an undulating contoured inner edge 440 adapted to comfortably fit against a user's fingers, such that when the carry strap and handle 100 is lifted by the user, the undulations prevent excessive sliding of the device about the user's hands. Also, a gripping surface made from a textured or easily gripped material, such as rubber of the like, may be formed on or attached to the surface of the grip portion 149 to reduce undesired movement of the handle about the user's hands.
Also as seen in
In general, the length of the strap portion 110 may be pre-selected to advantageously approximate a circumference around an object to be lifted. Alternatively, a distance between longitudinally spaced coupling portions 125 may be pre-selected based upon the circumference of the object to be lifted.
The handle halves 140a,b may be arranged on the strap portion 110 near the first end of the device 100 and may automatically fold flat when not in use, into the plane of the strap. A gusset 145 may be affixed to and arranged between at least one lateral edge of the strap and at least one connecting portion of the handle, in order to strengthen the junction.
Depending on the embodiment, the subject carry strap 100 may be used alone or in combination with other carry straps 100. The carry straps 100 may be connected end-to-end, or used in parallel on the same object. In the latter situation, two or more carry straps 100 may be spaced apart along the length of an object by a distance approximately that of a user's outstretched arms, to allow the user to comfortably lift the object, with one handle 140 of one carry strap 100 in each hand. Alternatively, the carry strap 100 may be relatively wide, or may have a wide section between the two handle halves 140a,b of the carry strap 100. This would provide a comfortable spacing between handle halves 140a,b. Similar to the former application, this latter application allows a handle half 140a,b to be gripped, one in each hand.
The entire carry strap and handle 100 may be manufactured from a single piece of material. Preferably, the material for fabrication is a plastic. Suitable plastics that may be used include Nylon, Polyolefins such as polyethylene (including low-density polyethylene (LDPE), high-density polyethylene (HDPE), ultra-low-density polyethylene (ULDPE), ultra-high molecular-weight polyethylene (UHMWPE), cross-linked polyethylene (PEX), polyethylene terephthalate (PET)) and polyproylene. Other plastics that are believed suitable include polyester, polyamides, polyvinylchloride (PVC), vinyl, and the like. Particularly preferred are polyethylene and polypropylene. Alternatively, materials for fabrication of the carry strap and handle may include rubbers, metals, paper, cardboard, composite materials and animal products, such as leather. Metals used may include aluminum, copper, steel, and alloys of these, and other metals.
Also alternatively, the carry strap and handle 100 may be manufactured from a plurality of components, each being made from a different material. If the carry strap and handle 100 is manufactured from plastic, it may be cast, molded, shaped, for example by shearing and/or punching from flat stock, or formed by any other suitable means. If the carry strap and handle 100 is manufactured from metal, it also may be cast, stamped, or shaped, for example by shearing and/or punching.
While certain embodiments are described herein, it will be readily apparent that minor changes of structure and operation can be made without departing from the spirit of the invention, as defined by the scope of the appended claims. It is further intended that each element recited in the claims is to be understood as referring to all equivalent elements.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IB03/04713 | 10/24/2003 | WO | 00 | 9/28/2004 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2004/103848 | 12/2/2004 | WO | A |
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