Tie down apparatus, tie down system, and method of use

Abstract

Various embodiments of the present disclosure provide a tie down apparatus including a ratchet assembly coupled to a frame. The ratchet assembly includes a ratchet shaft defining a through channel sized and shaped to receive a strap, and a ratchet coupled to the ratchet shaft. The tie down apparatus also includes: a tensioner having a head and an axle coupled to the ratchet shaft, the axle being configured to rotate the ratchet shaft via engagement of the head by a drive unit; and a locking assembly coupled to the frame. The locking assembly includes: a pawl configured to engage the ratchet to rotate the ratchet in a first direction and rotate in a second direction; a release coupled to the pawl and configured to move between a first position and a second position; and a spring coupled at a first end to the release and at a second end to the frame.

Description

TIE DOWN APPARATUS, TIE DOWN SYSTEM, AND METHOD OF USEPRIORITY

[0001] This application claims priority to and the benefit of U.S. Provisional Patent Application No. 63 / 715,510, filed November 1, 2024, the entire contents of which is incorporated herein by reference.FIELD

[0002] The present disclosure relates to a tie down apparatus, a tie down system, and a method of using the tie down apparatus to tension a strap around a load.BACKGROUND

[0003] Goods are often stacked on a pallet for ease of transportation from one location to another. The stack of goods on the pallet is typically unitized before transportation to secure the stack as a single unit, reducing a likelihood of some of the goods falling off the stack during transportation. A variety of securing mechanisms can be used to unitize the stack of goods, including straps, cordage, and belts.

[0004] Manually tensioning a strap or belt around the stack of goods can be physically challenging and time consuming for an operator. The operator is often not able to tension the strap to a predetermined tension level or reproduce a tension level for different straps around different loads.SUMMARY

[0005] Various embodiments of the present disclosure provide a tie down apparatus, a tie down system, and a method for strapping a load. The disclosed devices, systems, and methods reduce cycle time and reduce physical demands on an operator by assisting the operator in strapping a load. Embodiments of the tie down apparatus, tie down system, and method of use of the present disclosure enable the operator to tension the strap to a predetermined tension level and to reproduce a tension level for different straps around different loads several times.

[0006] In one embodiment, a tie down apparatus is provided. The tie down apparatus includes: a body defining a housing; a frame disposed within the body; and a ratchetassembly coupled to the frame. The ratchet assembly includes a ratchet shaft defining a through channel sized and shaped to receive a strap, and a ratchet coupled to the ratchet shaft. The ratchet defines a plurality of teeth. The tie down apparatus also includes a tensioner having a head and an axle coupled to the ratchet shaft. The axle is configured to rotate the ratchet shaft via engagement of the head by a drive unit. The tie down apparatus also includes a locking assembly coupled to the frame. The locking assembly includes a pawl disposed within the housing and configured to engage at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction. The locking assembly also includes a release coupled to the pawl and configured to move between a first position and a second position. A portion of the release is disposed outside of the housing. The locking assembly also includes a spring coupled at a first end to the release and at a second end to the frame. Rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in the second position. The spring biases the release to the first position when disengaged from the second position.

[0007] In one embodiment, a tie down apparatus is provided. The tie down apparatus includes: a body defined by a frame; and a ratchet assembly coupled to the frame. The ratchet assembly includes: a ratchet shaft defining a through channel sized and shaped to receive a strap; a ratchet coupled to the ratchet shaft and defining a plurality of teeth; and a first drive wheel coupled to the ratchet shaft. The tie down apparatus further includes a tensioner having an axle coupled to the ratchet shaft and a second drive wheel coupled to the axle. The axle is configured to rotate the ratchet shaft through engagement of the second drive wheel. The tie down apparatus further includes an actuator coupled to the second drive wheel via the axle. Actuation of the actuator produces rotation of the ratchet shaft via engagement of the second drive wheel with the first drive wheel. The tie down apparatus further includes a power source coupled to the frame and the actuator, and a locking assembly coupled to the frame. The locking assembly includes a pawl configured to engage with at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction. The locking assembly also includes a release coupled to the pawl and configured to move between a first position and a second position. The locking assembly also includes a spring coupled at a first end to the release and at a second end to the frame. Rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in thesecond position. The spring biases the release to the first position when disengaged from the second position.

[0008] In one embodiment, a method for strapping a load is provided. The method includes engaging a drive unit with a head of a retractor of a tie down apparatus to retract a strap disposed in a strap dispenser of the tie down apparatus. The retractor is coupled to the strap dispenser and includes an axle extending into a cavity defined by the strap dispenser, with the head of the retractor coupled to the axle. The method also includes retracting, using the drive unit engaged to the retractor, a length of the strap from the strap dispenser. The strap has a first end coupled to the strap dispenser and a free second end. The method also includes wrapping the length of the strap around the load such as to secure the load. The method also includes inserting the free second end of the strap through a through channel of a ratchet shaft of a ratchet assembly of the tie down apparatus. The method also includes disengaging the drive unit with the head of the retractor, and engaging the drive unit with a head of a tensioner of the tie down apparatus. The head of the tensioner is coupled to the ratchet shaft of the ratchet assembly via an axle. The method further includes tensioning, using the drive unit engaged with the head of the tensioner, the length of the strap by rotating the ratchet shaft of the tie down apparatus to increase a level of tension in the strap.BRIEF DESCRIPTION OF THE FIGURES

[0009] Figure 1 is a perspective view of one example embodiment of a tie down apparatus.

[0010] Figure 2 is a perspective view of the tie down apparatus of Figure 1 with a portion of the housing removed.

[0011] Figure 3 is a perspective view of the tie down apparatus of Figure 1 with the housing removed.

[0012] Figure 4 is a perspective view of another example embodiment of a tie down apparatus.

[0013] Figure 5 is a bottom view of the tie down apparatus of Figure 4.

[0014] Figure 6 is a perspective view of the tie down apparatus of Figure 4 with a portion of the housing removed.

[0015] Figure 7 is a perspective view of the tie down apparatus of Figure 4 with the housing removed.

[0016] Figure 8 is a perspective view of another example embodiment of a tie down apparatus with the housing removed.

[0017] Figure 9 is a partial perspective view of another example embodiment of a tie down apparatus with the housing removed.

[0018] Figure 10A is a perspective view of another example embodiment of a tie down apparatus receiving an end of a strap.

[0019] Figure 10B is a perspective view of the tie down apparatus of Figure 10A tensioning a strap.

[0020] Figure 11 is a perspective view of an example of the tie down apparatus of Figure 10A tensioning a strap around a load.DETAILED DESCRIPTION

[0021] While the systems, devices, and methods described herein may be embodied in various forms, the drawings show and the specification describes certain exemplary and nonlimiting embodiments. Not all of the components shown in the drawings and described in the specification may be required, and certain implementations may include additional, different, or fewer components. Variations in the arrangement and type of the components; the shapes, sizes, and materials of the components; and the manners of connections of the components may be made without departing from the spirit or scope of the claims. Unless otherwise indicated, any directions referred to in the specification reflect the orientations of the components shown in the corresponding drawings and do not limit the scope of the present disclosure. Further, terms that refer to mounting methods, such as mounted, connected, etc., are not intended to be limited to direct mounting methods but should be interpreted broadly to include indirect and operably mounted, connected, and like mounting methods. This specification is intended to be taken as a whole and interpreted in accordance with the principles of the present disclosure and as understood by one of ordinary skill in the art.

[0022] Various embodiments of the present disclosure provide a tie down apparatus, a tie down system, and a method of using the tie down apparatus. The tie down apparatus enables an operator to tension a strap around a load to a predetermined tension level and to tension different straps to a reproducible tension level.

[0023] Figures 1-3 show one embodiment of a tie down apparatus 100. The tie down apparatus 100 includes a body 111 defining a housing 110, a tensioner 120, a retractor 130, a strap dispenser 140, a locking assembly 150, a ratchet assembly 160, and a frame 170. The frame 170 is disposed inside of the housing 110. The ratchet assembly 160 and the locking assembly 150 are coupled to the frame 170.

[0024] The housing 110 includes a first side 112 and a second side 114 adjacent to the first side 112. A first opening 116 is defined through the second side 114, and a second opening 118 is defined through the second side 114. The first opening 116 is sized and shaped to receive a head 122 of a tensioner 120, and a portion of the head 122 of the tensioner 120 is disposed within the first opening 116. The second opening 118 is sized and shaped to receive a head 132 of a retractor 130, and a portion of the head 132 of the retractor 130 is disposed within the second opening 118.

[0025] The head 122 of the tensioner 120 and the head 132 of the retractor 130 are configured to be engaged by a drive unit. In some embodiments, the head 122 and the head 132 are configured to be pushed by a drive unit to create a connection with a ratchet shaft 164. The drive unit is configured to rotate the head 122 of the tensioner 120 and the head 132 of the retractor 130. In some embodiments, the drive unit takes the form of drive unit 50 illustrated in Figure 11. Further, in some embodiments, the driver unit is a drill configured to rotate either the head 122 or the head 132. In some such embodiments, the drill is a cordless drill or a corded drill.

[0026] The housing 110 also includes a third opening disposed at a top portion of the housing 110. The third opening is defined through the top portion of the housing 110. A release 152 of the locking assembly 150 protrudes from the housing 110. A shroud 152 A is disposed at the top portion of the housing 110 and is configured to surround the third opening. The shroud 152A protects the release 152, shielding the release 152 from external components or damage. The shroud 152A reduces any debris from entering the third opening or reduces the user from pinching their fingers in the locking assembly.

[0027] The tensioner 120 includes the head 122 and an axle 124. The axle 124 has an end attached to the head 122 and another end coupled to a ratchet assembly 160. In some embodiments, the axle 124 is a rod. The ratchet assembly 160 includes a pair of ratchets 162, and a ratchet shaft 164. Each ratchet 162 is disposed and coupled at opposing ends of the ratchet shaft 164. Further, each ratchet 162 defines a plurality of teeth 163. The ratchet shaft164 defines a through channel 166 sized and shaped to receive a strap. In some embodiments, the channel 166 is a slot.

[0028] In some embodiments, the strap takes the form of strap 590 illustrated in Figures 10A-10B and 11. In some embodiments, the strap is a reuseable strap. Further, in some embodiments, the strap is a woven material, such as cotton or polyester; plastic; or metal. In some embodiments, the strap takes the form of a belt.

[0029] The axle 124 of the tensioner 120 is coupled to the ratchet shaft 164. In the embodiment illustrated in Figures 1-3, a longitudinal axis defined by the axle 124 is substantially parallel with a longitudinal axis defined by the ratchet shaft 164. In some embodiments, the tensioner 120 includes a gear assembly coupling the axle 124 to the ratchet shaft 164.

[0030] The axle 124 is configured to rotate the ratchet shaft 164 via engagement of the head 122 by the drive unit. In some embodiments, the axle 124 is configured so that it turns the ratchet shaft 164 when the head 122 is pushed by the drive unit. When the drive unit is engaged with the head 122 of the tensioner 120, the drive unit rotates the head 122. The head 122 then rotates the axle 124 which in turn rotates the ratchets 162 and the ratchet shaft 164. The rotation drives the ratchets 162 and the ratchet shaft 164, causing the strap attached to the ratchet shaft 164 to be pulled, and thus applying a tension to the strap.

[0031] In some embodiments, the tensioner 120 includes a predetermined maximum tension level. However, in other embodiments, the tensioner 120 includes an adjustable maximum tension level.

[0032] In some embodiments, the applied strap tension is indicated using a force indicator 195 or a display. In some embodiments, the force indicator is a spring scale.

[0033] The retractor 130 includes the head 132 and an axle 134. The axle 134 is disposed below the axle 124. The axle 134 has an end attached to the head 132 and another end coupled to the strap dispenser 140. The axle 134 extends into a cavity defined by the strap dispenser 140 and is configured to store the strap and dispense the stored strap. In some embodiments, the axle 134 is a rod.

[0034] In some embodiments, the strap is retracted through the engagement of the head 132 of the retractor 130 by the drive unit. The drive unit, when engaged with the head 132, rotates the axle 134 which in turn dispenses the strap wrapped around the axle 134. However, inother embodiments, the strap is dispensed from the strap dispenser 140 through pulling movement on the strap.

[0035] The locking assembly 150 is coupled to the frame 170 and is configured to engage with the ratchet assembly 160 to lock the rotation of the ratchets 162, and thus reduce rotation of the ratchet shaft 164. In some embodiments, rotation is reduced in one rotational direction. The locking assembly 150 includes the release 152, the shroud 152A, a pair of pawls 154, and springs 156. While the embodiment of the locking assembly 150 illustrated in Figure 3 includes three springs 156, in other embodiments the locking assembly includes more or less than three springs.

[0036] The release 152 includes a handle with two parallel vertical grips, one top horizontal bar, and one central horizontal bar. Pawls 154 are integrated at the bottom of each vertical grip, enabling the handle to function as both a gripping device and a locking mechanism. The top and central horizontal bars connect the two parallel vertical grips to each other and provide stability and multiple grip points, while the pawls 154 engage with teeth 163 of corresponding ratchets 162. The teeth 163 allow rotation of the corresponding ratchets 162 in one direction, while reducing rotation of the corresponding ratchets 162 in the opposite direction.

[0037] The release 152 moves between a first position and a second position, with part of the release 152 extending outside the housing 110. The springs 156 are connected at one end to the release 152 and at the other end to the frame 170. Each spring 156 is connected at one end to a portion of the release 152 and connected at the other end to the frame 170. When the release 152 is in the first position, the pawls 154 prevent rotation of the ratchets 162 in the second direction. Conversely, when the release 152 is in the second position, the rotation in the second direction is permitted. The springs 156 bias the release 152 back to the first position when it is disengaged from the second position.

[0038] In some embodiments, an operator uses the tie down apparatus 100 to tension a strap around a load. First the operator pulls on a free end of the strap, which has one end coupled to the through channel 166, to dispense the strap from the apparatus. In some embodiments, the operator actuates the release 152, moving the release 152 to the second position, which allows rotation in the second direction by disengaging the pawls 154 from the corresponding ratchets 162. In some embodiments, the operator engages the drive unit with the retractor 130 to dispense the strap from the dispenser 140. After the strap is dispensed, theoperator releases the release 152, which causes the pawls 154 to reengage with the ratchets 162.

[0039] Next, the operator wraps the strap around the load and attaches the free end to a first piece of a quick connect buckle 190. The operator then closes the quick connect buckle 190, securing the free end of the strap. The operator then disengages the drive unit from the retractor 130 and engages the drive unit with the tensioner 120, which rotates the ratchet shaft 164 to apply tension to the strap.

[0040] To release tension in the strap, the operator actuates the release 152. The operator then engages the drive unit to the retractor 130 to retract the strap wound around the ratchet shaft 164, and wrap the excess strap to store in the dispenser 140.

[0041] In some embodiments the release 152 is a depressible button and when in first position the button is in an undepressed state and when in the second position the button is in a depressed state.

[0042] In some embodiments, the tie down apparatus 100 does not have the retractor 130 or the strap dispenser 140, and in such embodiments the tie down apparatus 100 has a tether.

[0043] In some embodiments, the tie down apparatus 100 does not include a separate drive unit, and in such embodiments the tie down apparatus 100 includes multiple actuators and a power source.

[0044] In some embodiments, the tie down apparatus 100 does not include the retractor 130, the strap dispenser 140, or a separate drive unit, and in such embodiments the tie down apparatus 100 includes a tether, an actuator, and a power source.

[0045] Figures 4 7 show another embodiment of a tie down apparatus 200. In such an embodiment, one or more components of the tie down apparatus 200 are the same or similar in form and function to one or more components of the tie down apparatus 100. Further, in the embodiment illustrated in Figures 4—7, the tie down apparatus 200 includes a tether 230.

[0046] The tie down apparatus 200 includes a body 211 defining a housing 210, a tensioner 220, the tether 230, a locking assembly 250, a ratchet assembly 260, and a frame 270. The frame 270 is disposed inside of the housing 210 and the ratchet assembly 260 is coupled to the frame 270.

[0047] The housing 210 includes a first side 212, a second side 214 adjacent to the first side 212, and a bottom side 218. The bottom side 218 is adjacent to both the first side 212 and the second side 214, and the bottom side 218 connects the first side 212 and the second side 214.

[0048] The second side 214 of the housing 210 includes an opening 216. The opening 216 is defined through the second side 214 of the housing 210. The opening 216 is sized and shaped to receive a head 222 of a tensioner 220, and a portion of the head 222 of the tensioner 220 is disposed within the opening 216.

[0049] The bottom side 218 of the housing 210 also includes the tether 230 configured to provide an exit for a free end of a strap. In some embodiments, the tether 230 is an outlet for a free end of the strap to dispense out of the housing 210. In some embodiments, one end of the strap is attached to the ratchet assembly 260 located within the housing 210, and the other free end of the strap is designed to extend outward through the tether 230 so as to assist an operator in tensioning the strap around a load. For example, an operator pulls on the strap to pull the strap through the tether 230 out of the apparatus. The free end of the strap is then attached to a quick connect buckle 290.

[0050] The housing 210 also includes a third opening disposed at a top portion of the housing 210. The third opening is defined through the top portion of the housing 210. The third opening allows a release 252 to protrude out of the housing 210. Additionally, a shroud 252 A is disposed at the top portion of the housing 210 and is configured to surround the third opening from which the release 252 of the locking assembly 250 protrudes out, which is fiirther described below. The shroud 252A protects the release 252, shielding the release 252 from physical damage or external components. Additionally, the shroud 252A prohibits any debris from entering the third opening.

[0051] The tensioner 220, the locking assembly 250, the ratchet assembly 260, and the frame 270 of the tie down apparatus 200, are similar in function to the tensioner 120, the locking assembly 150, the ratchet assembly 160, and the frame 170, respectively, of the tie down apparatus 100. The tensioner 220 includes a head 222 and an axle 224. The axle 224 has an end attached to the head 222 and another end coupled to the ratchet assembly 260.

[0052] The ratchet assembly 260 includes a pair of ratchets 262, and a ratchet shaft 264. Each ratchet 262 is disposed and coupled at opposing ends of the ratchet shaft 264. Additionally, each ratchet 262 defines a plurality of teeth 263. The ratchet shaft 264 defines a through channel 266 sized and shaped to receive a strap. The axle 224 of the tensioner 220 iscoupled to the ratchet shaft 264, and a longitudinal axis defined by the axle 224 is substantially parallel with a longitudinal axis defined by the ratchet shaft 264. The axle 224 is configured to rotate the ratchet shaft 264 via engagement of the head 222 by the drive unit.

[0053] The locking assembly 250 is coupled to the frame 270 and is configured to engage with the ratchet assembly 260 to lock the rotation of the ratchets 262, thus inhibiting the rotation of the ratchet shaft 264. The locking assembly 250 includes the release 252, the shroud 252A, a pair of pawls 254, and three springs 256.

[0054] In some embodiments, an operator uses the tie down apparatus 200 to tension a strap around a load in a similar way as operator uses the tie down apparatus 100 to tension the strap around the load. However, unlike the tie down apparatus 100, during use of the tie down apparatus 200, the operator manually retracts the strap from the tether 230.

[0055] In some embodiments, when the release 252 is in the second position, the operator pulls an end of the strap wrapped around the ratchet shaft 264, which dispenses the strap from the tie down apparatus 200. In other embodiments, to tension the strap, the operator engages the tensioner 220, via the drive unit, which rotates the ratchet shaft 264 causing the strap to wrap around the ratchet shaft 264. When the apparatus is not in use, the strap is dispensed out of the apparatus through the tether 230.

[0056] Figure 8 shows another embodiment of a tie down apparatus 300. In such an embodiment, one or more components of the tie down apparatus 300 are the same or similar in form and function as one or more components of the tie down apparatus 100. Further, in the embodiment illustrated in Figure 8, the tie down apparatus 300 includes a pair of actuators 326 and 336, and a power unit 380 coupled to the actuators 326 and 328.

[0057] The tie down apparatus 300 includes a body 311 defined by a frame 310, a tensioner 320, a retractor 330, a strap dispenser 340, a locking assembly 350, a ratchet assembly 360, and the power unit 380. The locking assembly 350, the ratchet assembly 360, and the power unit 380 are coupled to the frame 310. In some embodiments, the body 311 defined by the frame 310 is disposed inside of a housing similar to the housing 110 and 210.

[0058] The ratchet assembly 360 includes a pair of ratchets 362, a ratchet shaft 364, and a first drive wheel 368. The ratchets 362 are coupled at each end of the ratchet shaft 364. Additionally, each ratchet 362 defines a plurality of teeth 363. The ratchet shaft 364 defines a through channel 366 sized and shaped to receive a strap. The first drive wheel 368 is alsocoupled at an end of the ratchet shaft 364 and adjacent to a ratchet 362 and the tensioner 320. Rotation of the first drive wheel 368 causes the ratchet shaft 364 and the attached ratchets 362 to rotate in unison.

[0059] The tensioner 320 includes a second drive wheel 322, an axle 324, and an actuator 326. The second drive wheel 322 is coupled to the axle 324 at one end, and the actuator 326 is coupled to the axle 324 at another end. The actuator 326 is a drive unit configured to rotate the axle 324. In some embodiments, the second drive wheel 322 is a head attached to the axle 324.

[0060] The actuator 326 is coupled to the axle 324, which rotates the second drive wheel 322. The second drive wheel 322 is engaged with the first drive wheel 368. The second drive wheel 322, via the first drive wheel 368, rotates the ratchet shaft 364 and the ratchet 362 that is coupled to the ratchet shaft 364.

[0061] In some embodiments, the first drive wheel 368 and the second drive wheel 322 are gears configured to engage with each other.

[0062] In some embodiments, the tensioner 320 includes a predetermined maximum tension level. However, in other embodiments, the tensioner 320 includes an adjustable maximum level.

[0063] The strap dispenser 340 is coupled to the frame 310, and is sized and shaped to retain and dispense a strap. The strap dispenser 340 includes a spool around which the strap is wrapped. The spool is disposed in a cavity defined as the strap dispenser 340. In some embodiments, the spool is an axle.

[0064] The strap dispenser 340 also includes a third drive wheel 342. The third drive wheel 342 is coupled to the strap dispenser such that when the third wheel 342 rotates, the strap dispenser 340 also rotates.

[0065] The retractor 330 includes a fourth drive wheel 332, an axle 334, and an actuator 336. The fourth drive wheel 332 is coupled to the axle 334 at one end, and the actuator 336 is coupled to the axle 334 at another end. The actuator 336 is a drive unit configured to rotate the axle 334. In some embodiments, the fourth drive wheel 332 is a head attached to the axle 334.

[0066] For example, the actuator 336 of the retractor 330 rotates the axle 334 and thus the fourth drive wheel 332. The fourth drive wheel 332 is engaged with the third drive wheel 342, which is engaged with the spool 340. As a result, the actuator 336 rotates the spool 340 via engagement of the fourth drive wheel 332 and the third drive wheel 342.

[0067] In some embodiments, the third drive wheel 342 and the fourth drive wheel 332 are gears configured to engage with each other.

[0068] The power unit 380 is configured to provide power to both the first actuator 326 and the second actuator 336. The locking assembly 350 includes similar components and is similar in function to the locking assembly 150 of the tie down apparatus 100. The locking assembly 350 is coupled to the frame 370 and is configured to engage with the ratchet assembly 360 to lock the rotation of the ratchets 362, thus reducing the rotation of the ratchet shaft 364. The locking assembly 350 includes the release 352, the shroud 352a, a pair of pawls 354, and three springs 356.

[0069] In some embodiments an operator uses the tie down apparatus 300 to tension a strap around a load in a similar way as the operator uses the tie down apparatus 100 to tension the strap around the load. However, during use of the tie down apparatus 300, the operator uses the actuators 326 and 336 to retract and tension the strap.

[0070] In some embodiments, an operator actuates the release 352, moving the release 352 to the second position, which allows rotation in the second direction by disengaging the pawls 354 from the corresponding ratchets 362. In some embodiments, the operator dispenses the strap by pulling the strap out of the apparatus. After the strap is dispensed, the operator releases the release 352, which causes the pawls 354 to reengage with the ratchets 362.

[0071] The operator then wraps the strap around the load and attaches the free end to a first piece of a quick connect buckle 390. . The operator then closes the quick connect buckle 390, securing the free end of the strap. The operator then actuates the first actuator 326 to rotate the ratchet shaft 364 to provide tension to the strap.

[0072] To release tension in the strap, the operator actuates the release 352 disengaging the pawls 354 from the corresponding ratchets 362, which allows the ratchet shaft 364 to rotate freely. In some embodiments, the operator pulls on the strap to retract the strap. The operator then actuates the second actuator 336 to retract the strap wrapped around the ratchet shaft 364.

[0073] Figure 9 shows another embodiment of a tie down apparatus 400. In such an embodiment, one or more components of the tie down apparatus 400 are the same or similar in form and function to one or more components of the tie down apparatus 300 described above. Further, in the embodiment illustrated in Figure 9, the tie down apparatus 400 includes a tether 430 and only one actuator 426, and does not includes a retractor 330 or a strap dispenser 340.

[0074] The tie down apparatus 400 includes a body 411 defined by a frame 410, a tensioner 420, a tether 430, a locking assembly 450, a ratchet assembly 460, and a power unit 480. The locking assembly 450, the ratchet assembly 460, and the power unit 480 are coupled to the frame 410. Although not depicted in Figure 9, in some embodiments, the body defined by the frame 410 is disposed inside of a housing similar to the housing 110 and 210.

[0075] The ratchet assembly 460 includes similar components and is similar in function to the ratchet assembly 360 of the tie down apparatus 300. The ratchet assembly 460 includes a pair of ratchets 462, a ratchet shaft 464, and a first drive wheel 468. The ratchets 462 are coupled to the ratchet shaft 464 at opposite ends and each ratchet 462 defines a plurality of teeth 463. The ratchet shaft 464 defines a through channel 466 sized and shaped to receive a strap. The first drive wheel 468 is also coupled to the ratchet shaft 464. The first drive wheel 468 is disposed at one end of the ratchet shaft 464, adjacent to both a ratchet 462 and the tensioner 420. Rotation of the first drive wheel 468 causes the ratchet shaft 464 and the attached ratchet 462 to rotate in unison.

[0076] The tensioner 420 includes similar components and is similar in function to the tensioner 320 of the tie down apparatus 300. The tensioner 420 includes a second drive wheel (e.g., head) 422, an axle 424, and an actuator 426. The second drive wheel 422 is coupled to the axle 424 at one end, and the actuator 426 is coupled to the axle 424 at another end. The actuator 426, powered by the power unit 480, rotates the axle 424.

[0077] As mentioned above, the tie down apparatus 400 also includes a tether 430. The tether 430 is similar in function to the tether 230 of the tie down apparatus 200. The tether 430 is an outlet for a free end of the strap to dispense out of a housing. In some embodiments, one end of the strap is attached to the ratchet assembly 460 located within the housing, and the other free end of the strap is designed to extend outward through the tether 430 so as to assist an operator in tensioning the excess strap around a load. The other free end of the strapcan be coupled to a quick connect buckle 490. The tether 430 is defined as a portion of the strap that extends away from the ratchet assembly 460.

[0078] The locking assembly 450 includes similar components and is similar in function to the locking assembly 150 of the tie down apparatus 100. The locking assembly 450 is coupled to the frame 410 and is configured to engage with the ratchet assembly 460 to lock the rotation of the ratchets 462, thus inhibiting the rotation of the ratchet shaft 464. In some embodiments, the locking assembly inhibits the rotation of the ratchet assembly in one direction. The locking assembly 450 includes the release 452, the shroud 452a, a pair of pawls 454, and three springs 456.

[0079] In some embodiments, an operator uses the tie down apparatus 400 to tension a strap around a load in a similar way as the operator uses the tie down apparatus 100 to tension to strap around the load. However, during use of the tie down apparatus 400, the operator uses the tether 430 and actuator 426 to retract and tension the strap.

[0080] In some embodiments, the operator actuates the first actuator 426 to rotate the ratchet shaft 464 to provide tension to a strap secured around a load. To release tension in the strap, the operator actuates the release 452, which disengages the pawls 454 from the corresponding ratchets 462, allowing the ratchet shaft 464 to rotate freely. When the release 452 is in the second position, the operator pulls on the strap wrapped around the ratchet shaft 464, which dispenses the strap from the tie down apparatus 400.

[0081] Figures 10A and 10B show another embodiment of a tie down apparatus 500. The tie down apparatus 500 includes a body 511 defining a housing 510, an actuator 520, a receiver 530, and a strap 590.

[0082] The housing 510 has a cylindrical shape having a first side 512 and a second side 514. The first side 512 includes an actuator 520 and an opening 518 disposed on the actuator 520. The opening 518 is defined through the actuator 520. The opening 518 is sized and shaped to receive a head 522 of a tensioner, and a portion of the head 522 of the tensioner is disposed within the opening 518.

[0083] The housing 510 also includes a protrusion 585 mounted on a curved surface 516 of the cylindrical shape. The protrusion 585 also has a proximal side and a distal side (e.g., receiver) 530. The proximal side of the protrusion 585 is attached to the cylinder's curved surface, while the distal side 530 includes a first slot (e.g., receiver slot) 532 that extendsthrough the housing 510. At the opposite end of the housing 510, opposing the protrusion 585, there are two additional slots: a second slot 534 and a third slot 536. The second slot 534 is configured to receive a first end 592 of the strap 590 where the first end 592 of the strap 590 is fixed. The third slot 536 is configured to communicate with the first slot 532 defining a through hole. The third slot 536 accommodates a second end 594 of the strap 590, which passes through the housing 510 from the first slot 532.

[0084] In the embodiment illustrated in Figure 10A, the first end 592 of the strap 590 is coupled to the tie down apparatus 500 via the second slot 534, and the second end 594 of the strap 590 is coupled to the tie down apparatus 500 via the first slot 532.

[0085] The head 522 of the actuator 520 is configured to be engaged by a drive unit, such as the drive unit 50 depicted in Figure 11. The drive unit is configured to rotate the head 522 of the actuator 520 to tension the strap.

[0086] The actuator 520, via the drive unit, is configured to tension the strap 590. In some embodiments, the actuator 520 includes a predetermined maximum tension level. However, in other embodiments, the actuator 520 includes an adjustable maximum tension level.

[0087] The release 524 is a depressible button having a first position and a second position. When the button is in the first position, the button is in an undepressed state, and when the button is in a second position, the button is in a depressed state. Figure 10A illustrates an example in which the release 524 is pressed, allowing the actuator 520, when engaged by a drive unit, to provide tension to the strap 590 when the strap 590 is inserted through the receiver 530 of the tie down apparatus 500. Figure 10B illustrates an example in which the release 524 is pressed, allowing the tension in the strap 590 to be released.

[0088] In some embodiments, when the release 524 is pressed, the drive unit engages with the head 522 to release tension in the strap 590. In some such embodiments, the drive unit is configured to rotate the head 522 in the opposite direction, thus relaxing the strap 590 from the tie down apparatus 500.

[0089] Figure 11 illustrates an example of the tie down apparatus 500 of Figure 10A tensioning a strap 590 around a load L. The load L includes a top T, a bottom B opposite the top T, a first side Si, and a second side S2 opposite the first side Si, where the first and second sides Si and S2 are disposed between the top T and the bottom B. The load L is disposed on apallet P that includes one or more through channels TC. The load L on the pallet P may be referred to as a palletized load.

[0090] The tie down apparatus 500 is positioned near the first side SI of the load L. One end of the strap 590, referred to as the first end 592, is connected to the tie down apparatus 500 via the second slot 534. The opposite end of the strap 590, referred to as the second end 594, is wrapped around the load L to secure it to the pallet P. To begin, the strap 590 is extended from the first side SI to the second side S2, passing through the through channel TC.

[0091] The second end 594 of the strap 590 is then looped over the top T of the load L, extending from the second side S2 back to the first side SI. The second end 594 of the strap 590 is inserted into the receiver slot 532 of the receiver 530 on the tie down apparatus 500, as shown in Figure 10A.

[0092] Next, with the actuator 520 in its unpressed state, a drive unit 50 is engaged with the head 522 of the actuator 520 on the tie down apparatus 500. The drive unit 50 is then used to rotate the head 522, thereby tensioning the strap 590 and securing the load by increasing the tension in the strap 590.

[0093] To release the tension in the strap 590 and unwrap the load L from the pallet P, the actuator 520 is pressed. Once pressed, the drive unit 50 rotates the head 522, allowing the strap 590 to be dispensed from the receiver slot 532.

[0094] In some embodiments, after pressing the actuator 520, the operator pulls the strap 590 from the tie down apparatus 500, releasing it from the receiver slot 532.

[0095] In some embodiments, a tie down system 600 is provided. In the embodiment illustrated in Figure 11, the tie down system 600 includes the tie down apparatus 500, the strap 590, and the drive unit 50.

[0096] Thus, in various embodiments, the disclosure provides a tie down apparatus including a body defining a housing; a frame disposed within the body; and a ratchet assembly coupled to the frame. The ratchet assembly includes a ratchet shaft defining a through channel sized and shaped to receive a strap, and a ratchet coupled to the ratchet shaft. The ratchet defining a plurality of teeth. The tie down apparatus also includes a tensioner having a head and an axle coupled to the ratchet shaft. The axle is configured to rotate the ratchet shaft via engagement of the head by a drive unit. The tie down apparatus also includesa locking assembly coupled to the frame. The locking assembly includes a pawl disposed within the housing and configured to engage at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction. The locking assembly also includes a release coupled to the pawl and configured to move between a first position and a second position. A portion of the release is disposed outside of the housing. The locking assembly also includes a spring coupled at a first end to the release and at a second end to the frame. Rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in the second position. The spring biases the release to the first position when disengaged from the second position.

[0097] In various embodiments the tie down apparatus further includes a strap dispenser coupled to the frame. The strap dispenser is sized and shaped to retain and dispense the strap.

[0098] In various embodiments the tie down apparatus further includes a retractor coupled to the strap dispenser. The retractor includes an axle extending into a cavity defined by the strap dispenser and a head coupled to the axle.

[0099] In various embodiments of the tie down apparatus, the axle is configured to dispense the strap through pulling movement on the strap and retract the strap through engagement of the head of the retractor by the drive unit.

[0100] In various embodiments of the tie down apparatus, the strap dispenser further includes an axle disposed within a cavity defined by the strap dispenser and a tension spring coupled to the axle. The tension spring is configured to automatically retract the strap within the strap dispenser.

[0101] In various embodiments of the tie down apparatus, a side of the housing includes an opening sized and shaped to receive the head of the tensioner. A portion of the head of the tensioner is disposed within the opening.

[0102] In various embodiments of the tie down apparatus, the release is a handle and when in the first position the handle is retracted and when in the second position the handle is extended.

[0103] In various embodiments of the tie down apparatus, the release is a depressible button and when in the first position the depressible button is in an undepressed state and when in the second position the depressible button is in a depressed state.

[0104] In various embodiments, the tie down apparatus further includes a receiver coupled to the frame. The receiver is sized and shaped to receive the strap.

[0105] In various embodiments of the tie down apparatus, the strap has a first end and a second end opposite the first end. The first end of the strap is coupled to the receiver and the second end is fed through the through channel of the ratchet shaft.

[0106] In various embodiments of the tie down apparatus, the ratchet assembly and the pawl are enclosed within the housing.

[0107] In various embodiments of the tie down apparatus, the tensioner further includes a gear assembly coupling the axle to the ratchet shaft.

[0108] In various embodiments of the tie down apparatus, a longitudinal axis defined by the axle of the tensioner is substantially parallel with a longitudinal axis defined by the ratchet shaft.

[0109] In various embodiments of the tie down apparatus, the tensioner further includes a predetermined maximum tension level.

[0110] In various embodiments of the tie down apparatus, the tensioner further includes an adjustable maximum tension level.

[0111] In various embodiments, the disclosure provides a tie down apparatus including: a body defined by a frame; and a ratchet assembly coupled to the frame. The ratchet assembly includes: a ratchet shaft defining a through channel sized and shaped to receive a strap; a ratchet coupled to the ratchet shaft and defining a plurality of teeth; and a first drive wheel coupled to the ratchet shaft. The tie down apparatus further includes a tensioner having an axle coupled to the ratchet shaft and a second drive wheel coupled to the axle. The axle is configured to rotate the ratchet shaft through engagement of the second drive wheel. The tie down apparatus further includes an actuator coupled to the second drive wheel via the axle. Actuation of the actuator produces rotation of the ratchet shaft via engagement of the second drive wheel with the first drive wheel. The tie down apparatus further includes a power source coupled to the frame and the actuator, and a locking assembly coupled to the frame. The locking assembly includes a pawl configured to engage with at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction. The locking assembly also includes a release coupled to the pawl and configured to move between a first position and a second position.The locking assembly also includes a spring coupled at a first end to the release and at a second end to the frame. Rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in the second position. The spring biases the release to the first position when disengaged from the second position.

[0112] In various embodiments, the tie down apparatus further includes a strap dispenser coupled to the frame. The strap dispenser is sized and shaped to retain and dispense the strap.

[0113] In various embodiments, the tie down apparatus further includes a third drive wheel coupled to a spool disposed within a cavity defined by the strap dispenser; and a second actuator including a fourth drive wheel coupled to the third drive wheel. Actuation of the second actuator produces rotation of the spool via engagement of the fourth drive wheel with the third drive wheel.

[0114] In various embodiments of the tie down apparatus, the power source is coupled to the second actuator.

[0115] In various embodiments of the tie down apparatus, the ratchet assembly, the actuator, and the power source are disposed within a housing.

[0116] In various embodiments, the disclosure provides a method for strapping. The method includes engaging a drive unit with a head of a retractor of a tie down apparatus to retract a strap disposed in a strap dispenser of the tie down apparatus. The retractor is coupled to the strap dispenser and includes an axle extending into a cavity defined by the strap dispenser, with the head of the retractor coupled to the axle. The method also includes retracting, using the drive unit engaged to the retractor, a length of the strap from the strap dispenser. The strap has a first end coupled to the strap dispenser and a free second end. The method also includes wrapping the length of the strap around the load such as to secure the load. The method also includes connecting the free second end of the strap to a quick connect buckle of the tie down apparatus. The method also includes disengaging the drive unit with the head of the retractor, and engaging the drive unit with a head of a tensioner of the tie down apparatus. The head of the tensioner is coupled to the ratchet shaft of the ratchet assembly via an axle. The method further includes tensioning, using the drive unit engaged with the head of the tensioner, the length of the strap by rotating the ratchet shaft of the tie down apparatus to increase a level of tension in the strap.

[0117] Although the embodiments described above involve reducing the rotation of the ratchet shaft, other embodiments involve locking the rotation of the ratchet shaft in a direction of rotation.

[0118] Various changes and modifications to the above-described embodiments described herein will be apparent to those skilled in the art. These changes and modifications can be made without departing from the spirit and scope of this present subject matter and without diminishing its intended advantages. Not all of the depicted components described in this disclosure may be required, and some implementations may include additional, different, or fewer components from those expressly described in this disclosure. Variations in the arrangement and type of the components; the shapes, sizes, and materials of the components; and the manners of attachment and connections of the components may be made without departing from the spirit or scope of the claims as set forth herein. Also, unless otherwise indicated, any directions referred to herein reflect the orientations of the components shown in the corresponding drawings and do not limit the scope of the present disclosure. This specification is intended to be taken as a whole and interpreted in accordance with the principles of the invention as taught herein and understood by one of ordinary skill in the art.

Claims

CLAIMS1. A tie down apparatus comprising: a body defining a housing; a frame disposed within the body; a ratchet assembly coupled to the frame, the ratchet assembly including: a ratchet shaft defining a through channel sized and shaped to receive a strap, and a ratchet coupled to the ratchet shaft, the ratchet defining a plurality of teeth; a tensioner having a head and an axle coupled to the ratchet shaft, wherein the axle is configured to rotate the ratchet shaft via engagement of the head by a drive unit; and a locking assembly coupled to the frame, the locking assembly including: a pawl disposed within the housing, wherein the pawl is configured to engage at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction, a release coupled to the pawl and configured to move between a first position and a second position, wherein a portion of the release is disposed outside of the housing, and a spring coupled at a first end to the release and at a second end to the frame, wherein rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in the second position, and wherein the spring biases the release to the first position when disengaged from the second position.

2. The tie down apparatus of claim 1, further comprising a strap dispenser coupled to the frame, wherein the strap dispenser is sized and shaped to retain and dispense the strap.

3. The tie down apparatus of claim 2, further comprising a retractor coupled to the strap dispenser, the retractor including an axle extending into a cavity defined by the strap dispenser and a head coupled to the axle.

4. The tie down apparatus of claim 3, wherein the axle is configured to dispense the strap through pulling movement on the strap and retract the strap through engagement of the head of the retractor by the drive unit.

5. The tie down apparatus of claim 2, wherein the strap dispenser further comprises an axle disposed within a cavity defined by the strap dispenser and a tension spring coupled to the axle, the tension spring configured to automatically retract the strap within the strap dispenser.

6. The tie down apparatus of claim 1, wherein a side of the housing comprises an opening sized and shaped to receive the head of the tensioner, and wherein a portion of the head of the tensioner is disposed within the opening.

7. The tie down apparatus of claim 1, wherein the release is a handle and wherein when in the first position the handle is retracted and when in the second position the handle is extended.

8. The tie down apparatus of claim 1, wherein the release is a depressible button and wherein when in the first position the depressible button is in an undepressed state and when in the second position the depressible button is in a depressed state.

9. The tie down apparatus of claim 1, further comprising a receiver coupled to the frame, wherein the receiver is sized and shaped to receive the strap.

10. The tie down apparatus of claim 9, wherein the strap has a first end and a second end opposite the first end, wherein the first end of the strap is coupled to the receiver and the second end is fed through the through channel of the ratchet shaft.

11. The tie down apparatus of claim 1 , wherein the tensioner further comprises a gear assembly coupling the axle to the ratchet shaft.

12. The tie down apparatus of claim 1, wherein a longitudinal axis defined by the axle of the tensioner is substantially parallel with a longitudinal axis defined by the ratchet shaft.

13. The tie down apparatus of claim 1, wherein the tensioner further comprises a predetermined maximum tension level.

14. The tie down apparatus of claim 1, wherein the tensioner further comprises an adjustable maximum tension level.

15. The tie down apparatus of claim 1, further comprising a force indicator configured to display a tension level.

16. A tie down apparatus comprising: a body defined by a frame; a ratchet assembly coupled to the frame, the ratchet assembly including: a ratchet shaft defining a through channel sized and shaped to receive a strap, a ratchet coupled to the ratchet shaft, the ratchet defining a plurality of teeth, and a first drive wheel coupled to the ratchet shaft; a tensioner having an axle coupled to the ratchet shaft and a second drive wheel coupled to the axle, wherein the axle is configured to rotate the ratchet shaft through engagement of the second drive wheel; an actuator coupled to the second drive wheel via the axle, wherein actuation of the actuator produces rotation of the ratchet shaft via engagement of the second drive wheel with the first drive wheel; a power source coupled to the frame and the actuator; and a locking assembly coupled to the frame, the locking assembly including: a pawl configured to engage with at least one of the plurality of teeth to allow rotation of the ratchet in a first direction and selectively inhibit rotation in a second direction opposite the first direction, a release coupled to the pawl and configured to move between a first position and a second position, and a spring coupled at a first end to the release and at a second end to the frame, wherein rotation of the ratchet in the second direction is inhibited by the pawl when the release is in the first position and permitted when the release is engaged in the second position, and wherein the spring biases the release to the first position when disengaged from the second position.

17. The tie down apparatus of claim 16, further comprising a strap dispenser coupled to the frame, wherein the strap dispenser is sized and shaped to retain and dispense the strap.

18. The tie down apparatus of claim 17, further comprising: a third drive wheel coupled to a spool disposed within a cavity defined by the strap dispenser; and a second actuator including a fourth drive wheel coupled to the third drive wheel, wherein actuation of the second actuator produces rotation of the spool via engagement of the fourth drive wheel with the third drive wheel.

19. The tie down apparatus of claim 18, wherein the power source is coupled to the second actuator.

20. A method for strapping a load, the method comprising: engaging a drive unit with a head of a retractor of a tie down apparatus to retract a strap disposed in a strap dispenser of the tie down apparatus, wherein the retractor is coupled to the strap dispenser and includes an axle extending into a cavity defined by the strap dispenser, with the head of the retractor coupled to the axle; retracting, using the drive unit engaged to the retractor, a length of the strap from the strap dispenser, wherein the strap has a first end coupled to the strap dispenser and a free second end; wrapping the length of the strap around the load such as to secure the load; connecting the free second end of the strap to a quick connect buckle of the tie down apparatus; disengaging the drive unit with the head of the retractor; engaging the drive unit with a head of a tensioner of the tie down apparatus, wherein the head of the tensioner is coupled to a ratchet shaft of a ratchet assembly via an axle; and tensioning, using the drive unit engaged with the head of the tensioner, the length of the strap by rotating the ratchet shaft of the tie down apparatus to increase a level of tension in the strap.

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