BARGE LID LIFTER SYSTEM AND METHOD

Abstract

A barge lid lifter system having a frame, a plurality of vertical beams adjustably mounted to the frame, a plurality of cross bracing beams, and a plurality of load engagement mechanisms mounted to the vertical beams. Each load engagement mechanism may include a frame including a dagger plate, and a linear actuator configured to position an arm is configured an arm over a dagger point to retain a lifting assembly of a barge lid. The brackets of the vertical beams are configured to mount onto plates disposed on the frame such that the position of the load engagement mechanisms can be adjusted to fit barge lids of varying lengths and widths.

Claims

1. A barge lid lifter system comprising: an upper frame; a lower frame connected to the upper frame by a plurality of cables, the lower frame comprising a plurality of side beams; and a plurality of vertical beams adjustably mounted to the lower frame, wherein the side beams have a first end and a second end, wherein the first end and the second end of each side beam comprises a plate; wherein individual ones of the plurality of vertical beams are connected to a respective bracket such that the vertical beams can be adjustably mounted at various positions on the plates disposed on the side beams of the lower frame, and wherein load engagement mechanisms are mounted to the individual ones of the plurality of vertical beams, and wherein the load engagement mechanisms are configured to retain lifting assemblies of a barge lid.

2. The barge lid lifter system of claim 1, wherein the individual vertical beams are connected to the respective brackets by a horizontal pivot pin.

3. The barge lid lifter system of claim 2, wherein the individual vertical beams comprise: a guide that is mounted below the horizontal pivot pin; and a bumper plate that is mounted above the horizontal pivot pin, wherein the respective brackets comprise a bumper such that the bumper plate is configured to contact the bumper when the vertical beams rotate about the horizontal pivot pin.

4. The barge lid lifter system of claim 1, wherein the lower frame is comprised of curvilinear side beams joined by a plurality of connecting rods.

5. The barge lid lifter system of claim 1, wherein the respective brackets have upper hooks and lower hooks, and wherein the plate comprises an upper flange and a lower flange.

6. The barge lid lifter system of claim 5, wherein the upper hooks of the respective brackets are configured to fit against the upper flange of the plates and the lower hooks of the respective brackets are configured to fit against the lower flange of the plates.

7. The barge lid lifter system of claim 5, wherein the upper hooks and the upper flange each have at least one complementary surface that is machined to allow each bracket to slide along the plates.

8. The barge lid lifter system of claim 5, wherein the lower flange further comprises a plurality of teeth, and wherein a lock assembly is provided adjacent to the lower hooks, wherein the lock assembly comprises a plunger that is configured to fit between the plurality of teeth of the lower flange such that the lock assembly prevents lateral movement of the respective brackets in relation to the plates.

9. A barge lid lifter system comprising: a frame having four corners, each of the four corners comprising a respective plate; a plurality of vertical beams, wherein individual ones of the plurality of vertical beams are adjustably mounted to the respective plate via a bracket; a plurality of load engagement mechanisms, individual ones of the plurality of load engagement mechanisms disposed on each vertical beam, each load engagement mechanism comprising: a mechanism frame comprising a dagger plate; and a linear actuator, the linear actuator configured to position an arm over a dagger point on the dagger plate to retain a lifting assembly of a barge lid.

10. The barge lid lifter system of claim 9, wherein the bracket comprises a locking assembly that prevents lateral movement of the bracket in relation to the respective plate.

11. The barge lid lifter system of claim 10, wherein each bracket has upper hooks and lower hooks, and wherein the respective plate comprises an upper flange and a lower flange.

12. The barge lid lifter system of claim 11, wherein the upper hooks of the bracket are configured to slidably fit against the upper flange of the respective plate and the lower hooks of the bracket are configured to slidably fit against the lower flange of the respective plate.

13. The barge lid lifter system of claim 12, wherein the upper hooks, the lower hooks, the upper flange, and the lower flange each have at least one surface that is machined, wherein individual ones of the plurality of vertical beams have a proximal portion and a distal portion, and wherein the brackets are disposed on the proximal portion.

14. The barge lid lifter system of claim 13, wherein the lower flange further comprises a plurality of teeth, and wherein the locking assembly is provided adjacent to the lower hooks, wherein the locking assembly comprises a plunger that is configured to fit between the plurality of teeth of the lower flange.

15. The barge lid lifter system of claim 9, wherein each of the plurality of vertical beams is connected to each bracket by a horizontal pivot pin, and wherein each of the plurality of vertical beams comprises: a guide that is mounted below the horizontal pivot pin; and a bumper plate that is mounted above the horizontal pivot pin; wherein each bracket comprises a bumper such that the bumper plate is configured to contact the bumper when the vertical beams rotate about the horizontal pivot pin.

16. A method of lifting a barge lid comprising the steps of: providing a barge lid lifter system, the barge lid lifter system having a frame, the frame comprising a plurality of vertical beams, individual ones of the plurality of vertical beams having a proximal portion that is adjustably mounted to the frame of the barge lid lifter system, and having a distal portion that is mounted to one of a plurality of load engagement mechanisms; contacting a plurality of guides of the barge lid lifter system to a barge, wherein each of the plurality of guides is mounted to a respective one of the plurality of vertical beams; landing the barge lid lifter system onto the barge lid, wherein individual lifting assemblies of the barge lid are positioned between a dagger point and an arm of individual ones of the plurality of load engagement mechanisms; and securing the plurality of barge lid lifting assemblies, wherein each of the arms of the plurality of load engagement mechanisms close over each of the dagger points to retain the plurality of lifting assemblies of the barge lid.

17. The method of claim 16 wherein the step of contacting further comprises rotating individual ones of the plurality of vertical beams about a horizontal pivot pin.

18. The method of claim 16 further comprising lifting the barge lid lifter system, wherein the barge lid is lifted off of the barge.

19. The method of claim 16, further comprising, adjusting one or more of the plurality of vertical beams to fit the lifting eyes of the barge lid, prior to contacting the plurality of guides, wherein individual vertical beams are adjustably mounted to the frame via a respective bracket, and wherein the respective brackets are mountable to a respective plate disposed on the frame.

20. The method of claim 18, further comprising verifying that the plurality of load engagement mechanisms are landed and latched prior to lifting the barge lid lifter system.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. 1 depicts a perspective view of a first embodiment of a barge lid lifter system.

[0008] FIG. 2 depicts a top view of the barge lid lifter system of FIG. 1.

[0009] FIG. 3 depicts a side view of the barge lid lifter system.

[0010] FIG. 4 depicts a perspective view of the barge lid lifter system above a barge lid.

[0011] FIG. 5 depicts a perspective view of a barge lid lifting assembly.

[0012] FIG. 6 depicts a perspective view of the barge lid lifter system that has landed on a barge lid.

[0013] FIG. 7 depicts a perspective view of the barge lid lifter system lifting the barge lid.

[0014] FIG. 8 depicts a partial cut-away perspective view of the barge lid lifter system landed on a barge lid.

[0015] FIG. 9 depicts a partial cut-away perspective view of the barge lid lifter system in which load engagement mechanisms are landed and latched on a barge lid lifting assembly.

[0016] FIG. 10 depicts a perspective view of an embodiment of a load engagement mechanism of the barge lid lifter system.

[0017] FIG. 11 depicts a front view of a load engagement mechanism of FIG. 10.

[0018] FIG. 12 depicts a side view of the load engagement mechanism of the barge lid lifter system.

[0019] FIG. 13 depicts a sectional view of the load engagement mechanism of the barge lid lifter system along line A-A of FIG. 12.

[0020] FIG. 14 depicts a front perspective view of the load engagement mechanism of the barge lid lifter system.

[0021] FIG. 15 depicts a side perspective view of the load engagement mechanism of the barge lid lifter system.

[0022] FIG. 16 depicts a perspective view of the load engagement mechanism of the barge lid lifter system in a landed and unlatched position from a barge lid lifting assembly.

[0023] FIG. 17 depicts a perspective view of the load engagement mechanism of the barge lid lifter system in a landed and latched position on a barge lid lifting assembly.

[0024] FIG. 18 depicts a perspective view of the load engagement mechanism of the barge lid lifter system in an unlanded and latched position on a barge lid lifting assembly.

[0025] FIG. 19 depicts a front perspective view of the load engagement mechanism of the barge lid lifter system in the unlanded and latched position on a barge lid lifting assembly.

[0026] FIG. 20 depicts a top perspective view of the load engagement mechanism of the barge lid lifter system in the unlanded and latched position on a barge lid lifting assembly.

[0027] FIG. 21 depicts a bottom perspective view of the load engagement mechanism of the barge lid lifter system in the unlanded and latched position on a barge lid lifting assembly.

[0028] FIG. 22 depicts a top perspective view of the load engagement mechanism of the barge lid lifter system in the landed and unlatched position from a barge lid lifting assembly.

[0029] FIG. 23 depicts a plurality of indication lights showing an example of the status of the barge lid lifter system throughout the process of lifting a barge lid.

[0030] FIG. 24 depicts a perspective view of a second embodiment of a barge lid lifter system.

[0031] FIG. 25 depicts a top view of the barge lid lifter system of FIG. 24.

[0032] FIG. 26 depicts a side view of the barge lid lifter system.

[0033] FIG. 27 depicts a load engagement mechanism having a vertical guide system.

[0034] FIG. 28 depicts a spring system of the vertical guide system of FIG. 27.

[0035] FIG. 29 depicts a tope view of the load engagement mechanism having a vertical guide system.

[0036] FIG. 30 depicts a cross sectional view of a connecting rod and spherical bearing of the second embodiment of the barge lid lifter system.

[0037] FIG. 31 depicts a perspective view of a third embodiment of a barge lid lifter system.

[0038] FIG. 32 depicts a dock side view of the third embodiment of the barge lid lifter system of FIG. 31.

[0039] FIG. 33 depicts a top view of the barge lid lifter system of FIG. 31.

[0040] FIG. 34 depicts a side view of the lower frame of the barge lid lifter system of FIG. 31.

[0041] FIG. 35 depicts a side view of the vertical beam and load engagement mechanism.

[0042] FIG. 36 depicts a dock side view of the vertical beam and load engagement mechanism.

[0043] FIG. 37 depicts a perspective view of the vertical beam and load engagement mechanism.

[0044] FIGS. 38a-d depict dock side views and perspective views of slider mount assemblies when the vertical beams are adjusted to the fore side of the plate and the aft side of the plate.

[0045] FIGS. 39a-b depict front perspective and rear perspective views of the bracket mounted to the plate.

[0046] FIGS. 40a-b depict side perspective views of vertical beams

[0047] FIGS. 41a-b depict side views of the slider mount assemblies in a first position and a second position.

[0048] FIGS. 42a-c depict perspective views and a front view of the load engagement mechanism of the barge lid lifter system of FIG. 31.

DETAILED DESCRIPTION

[0049] For the purposes of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Any alterations and further modifications in the described embodiments, and any further applications of the principles as described herein are contemplated as would normally occur to one skilled in the art to which the subject matter of the disclosure relates.

[0050] It is necessary to remove and reposition barge lids during loading and offloading of river barge freight. The barge lid lifter system allows workers on shore to land load engagement mechanisms onto a barge lid, acquire lifting hooks, and lift the barge lid off the barge, remotely. It is possible to minimize situations in which workers are required to climb or reach onto the barge by providing a remote communication system that allows the barge lid lifter system to verify that load engagement mechanisms are landed on a barge lid and latched onto barge lid lifting eyes. Less workers climbing onto barges to attach and release barge lids from lifting equipment will increase safety and result in a more efficient process of loading and offloading river barge freight.

[0051] Referring to FIG. 1, an example embodiment of a barge lid lifter system 100 is shown with a horizontal frame 102 connected to an oblong link 104 using a cable bridle 106. The oblong link 104 can be attached to a crane hook (not shown) or other lifting means. The illustrated embodiment shows cable anchor points 108a, 108b, 108c, 108d attached to the horizontal frame 102. The oblong link 104 is configured to accept a hook suspended from a crane or an overhead hoist. Alternate embodiments may include a frame with different anchor points configured to accept plate lifters, grapplers, container spreaders and other lifting systems for lifting balanced or unbalanced loads when weight is distributed over several points.

[0052] In the illustrated embodiments, reference numerals ending in a, b, c, or d correspond to structures that are related, such as the load engagement mechanisms 122a, 122b, 122c, 122d located at the four corners of the barge lid lifter system 100, or structures that occur in pairs such as side beams 110a, 110b, 310a, 310b, 510a, 510b in barge lid lifter systems 100, 300, 500.

[0053] The horizontal frame 102 includes two side beams 110a, 110b and two end beams 112a, 112b. Horizontal corner bracing beams 114a-114d provide support between the side beams and end beams, and horizontal side bracing beams 116a-116c are provided between the side beams 110a, 110b. A first housing 118 and a second housing 120 are mounted between horizontal side bracing beams 116a-116c of the horizontal frame 102. The first housing 118 contains a remote transmitter control system and is preferably water-tight to protect the remote transmitter control system from the elements. The remote transmitter control system includes relays, a programmable logic controller (PLC), radio communication equipment, and wiring. The second housing 120 contains a battery system to power the remote transmitter control system and the load engagement mechanisms 122a-122d of the barge lid lifter system 100. Other means of providing power to the barge lid lifter system 100 may include pneumatic power, hydraulic power, and mechanical power.

[0054] Indication lights 130 are provided on the sides and/or ends of the horizontal frame 102 to communicate the status of the load engagement mechanisms 122a-122d to crane operators, dock workers, and others working on land.

[0055] Four vertical beams 124a-124d are mounted on the four corners of the horizontal frame 102. A load engagement mechanism 122 is mounted to the bottom of each vertical beam 124.

[0056] Vertical corner bracing beams 126b, 126d are provided between the vertical beams 124b, 124d and the side beam 110b of the horizontal frame 102. Vertical cross bracing beams 128a-128d are installed diagonally between vertical beams 124a-124d to provide structural support on the ends of the horizontal frame 102.

[0057] Referring to FIG. 2, a top view of the barge lid lifter system 100 is shown. The horizontal frame 102 has a rectangular shape comprising two side beams 110a, 110b and two end beams 112a, 112b. The load engagement mechanisms 122a-122d are located below each corner of the horizontal frame 102.

[0058] Referring to FIG. 3, a side view of the barge lid lifter system 100 is shown. The first housing 118 and second housing 120 are mounted above the horizontal frame 102. Power cables and communication wiring (not shown) are run between the first housing 118, the second housing 120, and the load engagement mechanisms 122a-122d.

[0059] Referring to FIG. 4, the barge lid lifter system 100 is positioned over a barge lid 132. The barge lid 132 is made of fiberglass and is lifted using four lifting assemblies 134a-134d positioned at either edge 136a, 136b of the barge lid 132. The horizontal frame 102 is designed to engage each of the four lifting assemblies 134a-134d. The side beams 110a, 110b are approximately 30 feet long and the end beams 112a, 112b are approximately 9 feet long. An operator uses a crane to position the barge lid lifter system 100 so that the load engagement mechanisms 122a-122d are positioned over each of the barge lid lifting assemblies 134a-134d located on either edge 136a, 136b of the barge lid 132.

[0060] Typically, two barge lid lifting assemblies are mounted on the dock side of the barge lid and are spaced at a distance W.sub.A of approximately 9 feet. The barges typically have a width of approximately 30 feet, however, this distance can change over time as the barge ages and depending on whether the barge is fully loaded or completely empty. In the illustrated embodiment, the lid lifting assemblies on opposite sides of the barge are spaced at a distance W.sub.B of approximately 29 feet.

[0061] Preferably the load engagement mechanisms are adjustably mounted to the frame such that the barge lid lifter can be adjusted to fit barge lids having lifting assembly geometries that include a distance W.sub.A from about 8 feet to about 10 feet and a distance W.sub.B from about 29 feet to about 29.25 feet.

[0062] Once in position, an operator will verify the status of the load engagement mechanisms 122a-122d. The worker may lower the barge lid lifter system 100 down onto the barge lid 132 once all four of the load engagement mechanisms 122a-122d are verified to be in the unlatched position.

[0063] Tag lines, as may be required by the Occupational Safety and Health Administration, may be attached to the horizontal frame 102 to allow workers to guide the barge lid lifter system 100 as it is lowered into place. Additionally or alternatively, a removable guide system may be provided on the horizontal frame 102. The removable guides may be bolted onto and extend outward from the horizontal frame 102 to align the barge lid lifter system 100 with the sides 152, 154 of a barge 150.

[0064] Referring to FIG. 5, a perspective view of a barge lid lifting assembly 134 is shown with a portion of barge lid 132. Each lifting assembly 134 has a movable portion 138 and a fixed portion 140. The movable portion 138 includes a lifting eye 142 (or bail) attached to a clamp portion 144. The movable portion 138 is rotatably secured to the fixed portion 140 by two eyelets 146a, 146b. The fixed portion 140 includes an upper plate 148 and a bottom plate (not shown) that are bolted or otherwise affixed to the barge lid 132. A locator pin (not shown) extends from the bottom plate.

[0065] The clamp portion 144 of the barge lid lifting assembly 134 retains a flange on the side wall of a barge. To remove the barge lid 132, the lifting eye 142 is rotated away from the edge 136a of the barge lid 132 to raise the clamp portion 144. Barge lids having lifting assemblies with a lifting eye and a clamp portion may be sold by certain manufacturers such as Trinity Marine Products, Inc. of Dallas, Tex.

[0066] Referring to FIG. 6, the barge lid lifter system 100 is shown landed and unlatched on a barge lid 132. When a barge 150 is docked, a first end 112a of the horizontal frame 102 is positioned at a dock side 152 of the barge lid 132, and a second end 112b of the horizontal frame 102 is positioned at a far side 154 of the barge lid 132.

[0067] Referring to FIG. 7, after the load engagement mechanisms 122a-122d of the barge lid lifter system 100 engage the barge lid lifting assemblies 134a-134d (FIG. 4), the barge lid lifter system 100 and the barge lid 132 are lifted off of the barge 150 by a crane (not shown).

[0068] Referring to FIG. 8, the load engagement mechanisms 122a, 122b are landed on the barge lid lifting assemblies 134a, 134b such that each lifting eye 142a, 142b is positioned between the arm 160a, 160b and the mechanism frame 162a, 162b of each load engagement mechanism 122a, 122b.

[0069] Referring to FIG. 9, each of the load engagement mechanisms 122a, 122b comprises a linear actuator 164a, 164b that extends to retain the lifting eye 142a, 142b (not shown) and raise the clamp portion 144a, 144b of each barge lid lifting assembly 134a, 134b.

[0070] Referring to FIG. 10, a load engagement mechanism 122 is shown having a mechanism frame 162 attached to a vertical beam 124. The mechanism frame 162 of the load engagement mechanism 122 in this example embodiment includes a first side plate 166, a second side plate 168, a top plate 170, a horizontal pivot pin 172, a horizontal pivot pin sleeve 174, and a dagger plate 176. The first side plate 166 and second side plate 168 are welded to the top plate 170 and the dagger plate 176. The horizontal pivot pin 172 extends between the first side plate 166 and the second side plate 168 and is retained in a horizontal pivot pin sleeve 174 that is welded to the vertical beam 124. A grease fitting 178 is provided on the horizontal pivot pin sleeve 174 to lubricate the horizontal pivot pin 172. The components comprising the mechanism frame 162 of the load engagement mechanism 122 may be constructed of a high-strength low carbon alloy steel such as A572.

[0071] The linear actuator 164 is provided having a communication portion 180, an electric motor 182, a cylinder 184, a shaft 186, a rear portion 188, and a forward portion 190. The rear portion 188 of the linear actuator 164 is mounted to the first side plate 166 at a rear bracket 192 using a rear pin 194, and the forward portion 190 of the shaft 186 of the linear actuator 164 is mounted to a rotation elbow 196 at a forward bracket 198 using a forward pin 200. The forward pin 200 and rear pin 194 are held in place by ring pins 202a, 202b and bolts 204a, 204b. Pins used throughout this embodiment of the load engagement mechanism 122 are constructed of a general purpose low carbon steel alloy such as C1018.

[0072] The linear actuator 164 is powered by the battery system and controlled by the remote transmitter control system mounted on the horizontal frame 102 of the barge lid lifter system 100. A command is generated remotely by a dock worker or crane operator that is received by the radio transmitter control system. The linear actuator 164 contains internal limit switches used to determine the status of the shaft 186 of the linear actuator 164 and communicates with the PLC. The PLC controls the indication lights 130 on the horizontal frame 102 that are viewed by the crane operator and other workers on land.

[0073] The first side panel 166 of the load engagement mechanism 122 includes a vertical hinge 206 at a forward end. The vertical hinge 206 secures a rotation plate 208 to the first side plate 166 and allows the rotation plate 208 to turn about a vertical axis 210. The rotation elbow 196 is connected to the forward portion 190 of the shaft 186 of the linear actuator 164 and is welded to the rotation plate 208. The arm 160 is welded to the rotation plate 208 at a first end 212 and has a second end 214 that extends horizontally outward. The second end 214 of the arm 160 extends toward the second side plate 168 in the unlatched position. When the shaft 186 of the linear actuator 164 extends, the shaft 186 moves forward in the cylinder 184 and causes the rotation plate to rotate about the vertical hinge 206. As the rotation plate 208 turns, the second end 214 of the arm 160 moves over the dagger point 216 and toward the vertical beam 124.

[0074] In the illustrated embodiment, the shaft 186 of the linear actuator 164 is about 6 inches long and may extend about 4 to 5 inches from the unlatched position to the latched position. In other embodiments the shaft 186 of the linear actuator 164 may extend only about 3 inches or greater than about 5 inches to reach a latched position. In other embodiments the extension of the linear actuator 164 may be accomplished using the electric motor 182 or the linear actuator may comprise a means for extending such as, a hydraulic cylinder, a pneumatic cylinder, a voice coil (electric cylinder) or a linear motor (linear magnetic actuator using electromagnets).

[0075] One or more blocks 218 are attached to the vertical beam 124 to act as stops. The block 218 contacts the first side panel 166 when the load engagement mechanism 122 is unlanded. A gap (not shown) exists between the block 218 and the first side panel 166 when the load engagement mechanism 122 is landed on a barge lid 132 or when the weight of the mechanism frame 162 is otherwise supported from below rather than hanging from the vertical beam 124 (such as when sitting on the ground).

[0076] A vertical plate 220 is attached to the vertical beam 124. A gap 222 exists between the vertical plate 220 and a rear surface 224 of the top plate 170 when the load engagement mechanism 122 is unlanded. As the weight of the load engagement mechanism 122 is supported by the barge lid lifting assembly 134, the mechanism frame 162 pivots on the horizontal pivot pin 172 about a horizontal axis 173, and the vertical plate 220 contacts the rear surface 224 of the top plate 170.

[0077] In the illustrated embodiment, the mechanism frame 162 pivots approximately 4 to 8 degrees on the horizontal pivot pin 172 about the horizontal axis 173 from the unlanded position to the landed position. In other embodiments the mechanism frame 162 may pivot approximately 2 to 3 degrees or greater than approximately 8 degrees from an unlanded to a landed position (as the top plate 170 contacts the vertical plate 220). Preferably, the frame rotates between about 1 degree and about 45 degrees, more preferably, the frame rotates between about 3 degrees and about 30 degrees, and most preferably, the frame rotates between about 4 degrees and about 15 degrees. In other embodiments the thickness and/or location of the one or more blocks 218 and the thickness and/or location of the vertical plate 220 may be adjusted to increase or decrease the amount of rotation about the horizontal axis 173 between the landed and unlanded positions.

[0078] Referring to FIG. 11, the dagger point 216 is mounted to the dagger plate 176 and has a flat, top surface 226 that extends above the dagger plate 176 and has a non-flat, lower surface 228 that extends below the dagger plate 176. The dagger point 216 may, for example, be constructed from a high strength steel alloy such as A514 (sold as T-1 by ArcelorMittal).

[0079] Referring to FIG. 12, the first side plate 166 of the load engagement mechanism 122 has a rear bracket 192 that engages the rear portion 188 of the linear actuator 164 via a rear pin 194. The horizontal pivot pin 172 is retained in the first side plate 166 using a bolt 202c and a ring pin 204c. The non-flat, lower surface 228 of the dagger point 216 that extends below the first side plate 166 is useful for penetrating snow, ice, or any other debris that could be present on the top plate of a barge lid lifting assembly 134. The vertical hinge 206 allows the rotation plate 208 to rotate and thereby move the arm 160 between an unlatched position and a latched position. The vertical hinge 206 includes a hinge pin 230, held in place by a ring pin 202d and a bolt 204d, and a plurality of brass bushings 232a-232d.

[0080] Referring to FIG. 13, a sectional view along line A-A of FIG. 12 shows the horizontal pivot pin 172 retained in the first side panel 166 and the second side panel 168. A ring pin 202c (or eyebolt) extends through a shaft 234 in the horizontal pivot pin 172. The ring pin 202c is secured to the first side panel 166 by a bolt 204c and a washer 236. The horizontal pivot pin 172 is housed in a horizontal pivot pin sleeve 174 that extends between two bushings 232e, 232f that may come into contact with the first side panel 166 and the second side panel 168. The horizontal pivot pin sleeve 174 is permanently secured to the vertical beam 124 by welds or other means.

[0081] Referring to FIG. 14, when the load engagement mechanism 122 of the barge lid lifter system 100 is in an unlatched and unlanded position, the shaft 186 (not shown) of the linear actuator 164 is not extended, the arm 160 is substantially perpendicular to the second side plate 168, and the first side plate 166 is in contact with the block 218.

[0082] Referring to FIG. 15, when the load engagement mechanism 122 of the barge lid lifter system 100 is in an unlanded and unlatched position, a gap 222 exists between the top plate 170 of the mechanism frame 162 and the vertical plate 220 attached to the vertical beam 124.

[0083] Referring to FIG. 16, when the load engagement mechanism 122 of the barge lid lifter system 100 is in a landed and unlatched position, the shaft 186 of the linear actuator 164 is not extended, the rotation plate 208 is parallel to the first side plate 166, and the top plate 170 contacts the vertical plate 220. Only a portion of the barge lid 132 is shown in FIGS. 16-22 for the purpose of illustrating the interaction between the barge lid lifting assembly 134 and the load engagement mechanism 122.

[0084] Referring to FIG. 17, when the load engagement mechanism 122 of the barge lid lifter system 100 is in the landed and latched position, the shaft 186 of the linear actuator 164 is extended, the rotation plate 208 is nonparallel in relation to the first side plate 166, and the arm 160 is closed over the flat, top surface 226 of the dagger point 216.

[0085] In the illustrated embodiment, the arm 160 rotates approximately 70 degrees from the unlatched position to the latched position. In other embodiments the arm 160 may rotate only 45 degrees or greater than 180 degrees to reach a latched position. In the illustrated embodiment, the arm 160 has a thickness that is substantially constant over the length of the arm 160. In other embodiments the arm may have a curved shape and may have a thickness that is not constant over the length of the arm.

[0086] As the shaft 186 of the linear actuator 164 is extended, the arm 160 contacts the lifting eye 142 of the movable portion 138 of the barge lid lifting assembly 134 and the movable portion 138 rotates in the eyelets 146a, 146b toward the vertical beam 124. As the movable portion 138 rotates, the lifting eye 142 is retained below the arm 160, and the clamp portion 144 is raised out from under the barge lid 132.

[0087] The extension of the shaft 186 of the linear actuator 164 may accomplish three distinct actions with one motion. Extension of the linear actuator 164 rotates the rotation plate 208 and simultaneously, 1) rotates the movable portion 138 of the barge lid lifting assembly 134 up and toward the vertical beam 220, 2) unclamps the clamp portion 144 from the barge 150, and 3) secures the lifting eye 142 to the load engagement mechanism 122. The reverse is true when the linear actuator 164 is moved to an unextended position. As the shaft 186 retracts into the cylinder 184, three events take place: 1) the movable portion 138 of the lifting assembly 134 is rotated down and away from the vertical beam 220, 2) the clamp portion 144 is clamped to the barge 150, and 3) the lifting eye 142 is disengaged from the load engagement mechanism 122. All four barge lid lifting assemblies 134a-134d may be engaged by the load engagement mechanisms 122a-122d simultaneously or sequentially.

[0088] Each linear actuator comprises a sensor that determines the status of cylinder. When the cylinder is extended, the load engagement mechanism is latched, and when the cylinder is retracted (unextended) the load engagement mechanism is unlatched.

[0089] Referring to FIG. 18, when the load engagement mechanism 122 of the barge lid lifter system 100 is latched onto the barge lid lifting assembly 134 and lifting the barge lid 132, the load engagement mechanism 122 is in an unlanded and latched position. In this position, the lifting eye 142 contacts the dagger point 216 and the dagger plate 176, and the barge lid 132 hangs from the load engagement mechanism 122.

[0090] Referring to FIG. 19, when the load engagement mechanism of the barge lid lifter system 100 is in an unlanded and latched position, the dagger point 216 is no longer in contact with the upper plate 148 of the barge lid lifting assembly and no gap exists between the first side plate and the block 218.

[0091] Referring to FIG. 20, when the load engagement mechanism 122 of the barge lid lifter system 100 is in an unlanded and latched position, the arm 160 extends over the dagger point 216 and the lifting eye 142 toward the vertical plate 124.

[0092] Referring to FIG. 21, when the load engagement mechanism 122 of the barge lid lifter system 100 is viewed from below, the lower plate 238 of the fixed portion 140 of the barge lid lifting assembly 134 is visible. The locator pin 240 is attached to the lower plate 238 of the fixed portion 140 of the barge lid lifting assembly 134 and helps to guide the barge lid 132 into place on the flange 156 located at either sidewall 158 of a barge 150 (shown in FIGS. 6-7).

[0093] Referring to FIG. 22, when the load engagement mechanism 122 of the barge lid lifter system 100 is in a landed and unlatched position, the lifting eye 142 is in a substantially vertical position and the clamp portion 144 is in a lowered position.

[0094] Referring to FIG. 23, the barge lid lifter system 100 includes a plurality of indication lights 242 comprising three round lights arranged in a row. A first light 244 is yellow and becomes illuminated when all four of the load engagement mechanisms 122a-122d are landed. If any of the load engagement mechanisms 122a-122d is in an unlanded position, this light is off. The landed status is sensed by one or more proximity switches (not shown) which are mounted on the first side panel 166 or on the vertical beam 124. In an unlanded position the block 218 comes into contact with the first side panel 166. In a landed position, a gap (not shown) exists between the block 216 and the first side panel 216. A proximity sensor on the vertical beam 124 is used to determine when the first side panel 166 is in close proximity to the block and give a signal that the load engagement mechanism 122 is in an unlanded position. The proximity sensor determines when the first side panel 166 is not in close proximity to the block 218 and gives a signal that the load engagement mechanism 122 is in a landed position.

[0095] A second light 246 is green and becomes illuminated when the shaft 186 of the linear actuator 164 is extended to signal a latched position. The second light 246 is off in an unlatched position. A third light 248 is red and is illuminated when the shaft 186 of the linear actuator 164 is unextended to signal an unlatched position. The status of the linear actuator 164 is sensed by limit switches inside the linear actuator that are connected to the communication portion 180. The latched or unlatched status is communicated to the PLC which controls the indication lights 242.

[0096] As the barge lid lifter system 100 is moved into position, each load engagement mechanism 122 is in the unlanded and unlatched position. The first indication light status 250a shows an unlanded and unlatched position. The yellow and green lights are off, and the red light is illuminated (in each successive status shown in FIG. 23 (250a-250g): the first light, when illuminated, is yellow; the second light, when illuminated, is green; and the third light, when illuminated, is red). The second indication light status 250b shows a landed and unlatched position. The yellow and red lights are illuminated, and the green light is off. The third indication light status 250c shows a landed and latched position. The yellow and green lights are illuminated, and the red light is off. The fourth indication light status 250d shows an unlanded and latched position. The green light is illuminated, and the yellow and red lights are off. The fifth indication light status 250e shows a landed and latched position. The yellow and green lights are illuminated, and the red light is off. The sixth indication light status 250f shows a landed and unlatched position. The yellow and red lights are illuminated, and the green light is off. The seventh indication light status 250g shows an unlanded and unlatched position. The yellow and green lights are off, and the red light is illuminated.

[0097] Referring to FIG. 24, a second example embodiment of a barge lid lifter system 300 is shown. This second embodiment is provided with reference numerals that track like structures in the first embodiment, the first embodiment denoted by 100 series reference numerals and the second embodiment denoted by 300 series reference numerals.

[0098] The barge lid lifter system 300 includes an upper frame 302 connected to an oblong link 304 using a cable bridle 306, and a lower frame 303 connected to the upper frame 302 by a plurality of cables 327a-327d. The oblong link 304 can be attached to a crane hook (not shown) or other lifting means. The illustrated embodiment shows cable anchor points 308a, 308b, 308c, 308d attached to the upper frame 302. The oblong link 304 is configured to accept a hook suspended from a crane or an overhead hoist. Alternate embodiments may include a frame with different anchor points configured to accept plate lifters, grapplers, container spreaders and other lifting systems for lifting balanced or unbalanced loads when weight is distributed over several points.

[0099] When the barge lid lifter system 300 is landed on a barge lid, the lower frame rests on the barge lid, which creates slack in one or more of the cable that join the upper frame and the lower frame. This two-piece frame allows the crane to support the upper frame such that only the weight of the lower frame needs to be supported by the barge lid.

[0100] The upper frame 302 includes two side beams 310a, 310b and two end beams 312a, 312b. Horizontal bracing plates 314a-314b provide support between the side beams and end beams, and horizontal bracing beams 316a-316b are provided between the side beams 310a, 310b. A first housing 318 and a second housing 320 are mounted between horizontal side bracing beams 316a-316b of the upper frame 302. The first housing 318 contains a remote transmitter control system and is preferably water-tight to protect the remote transmitter control system from the elements. The remote transmitter control system includes relays, a programmable logic controller (PLC), radio communication equipment, and wiring. The second housing 320 contains a battery system to power the remote transmitter control system and the load engagement mechanisms 322a-322d of the barge lid lifter system 300. Other means of providing power to the barge lid lifter system 100 may include pneumatic power, hydraulic power, and mechanical power.

[0101] Indication lights 330 are provided on the sides and/or ends of the horizontal frame 302 to communicate the status of the load engagement mechanisms 322a-322d to crane operators, dock workers, and others working on land.

[0102] The lower frame 303 comprises two curvilinear side beams. The curvilinear side beams include upper anchor points 328a-328d and are joined by connecting rods 334a-334d. The ends of the connecting rods are retained in spherical bearings mounted on the curvilinear side beams. Each bearing housing 360 is mounted by a bearing housing support plate 361 that is welded to the upper and lower flanges of the curvilinear side beam 332. See FIG. 29. Four vertical beams 324a-324d are mounted on the four corners of the lower frame 303. Each load engagement mechanism 322 is mounted to the bottom of each vertical beam 324.

[0103] Referring to FIG. 25, a top view of the barge lid lifter system 300 is shown. The upper frame 302 has a rectangular shape comprising two side beams 310a, 310b and two end beams 312a, 312b. The load engagement mechanisms 322a-322d are located below each corner of the lower frame 303. Power cables and communication wiring (not shown) are run between the first housing 318, the second housing 320, and the load engagement mechanisms 322a-322d.

[0104] Referring to FIG. 26, a side view of the barge lid lifter system 300 is shown. The guides are mounted to the bracing beams 316a-316b of the upper frame 302 above the stops 317a, 317b on the lower frame 303.

[0105] Referring to FIG. 27, a perspective view of a vertical guide is shown. The barge lid lifter system 300 includes a plurality of vertical guides for positioning the load engagement mechanisms over the four lifting assemblies positioned at either of a barge lid. The lower frame 303 is designed to engage each of the four lifting assemblies. The side beams 310a, 310b are approximately 30 feet long and the connecting rods 334a-334d are approximately 9 feet long. The connecting rods are welded to rod end portions that are each retained in a spherical bearing. The bearing housings 360 are each welded to a bearing housing support plate 361 which is mounted to the inside of the side beams 332.

[0106] An operator uses a crane to position the barge lid lifter system 300 so that the load engagement mechanisms 322a-322d are positioned over each of the barge lid lifting assemblies located on the either edge of the barge lid. Once in position, an operator will verify the status of the load engagement mechanisms 322a-322d (unlatched). The worker may lower the barge lid lifter system 300 down onto the barge lid once all four of the load engagement mechanisms are verified to be in the unlatched position.

[0107] A guide system is provided on the lower frame 303. Each guide post 338 may be bolted onto and extend outward from each vertical beam 324 of the lower frame 303 to align the barge lid lifter system 100 with the sides 152, 154 of a barge 150. A vertical guide is attached to each guide post via a spring system 340 which includes a spring and a hinge.

[0108] Referring to FIG. 28, the vertical guide systems include a guide post 336 with a bracket 337. The lower portion of each vertical guide 338 forms an angular portion 339. The angular portion is sloped such that when the angular portion contacts the edge of a barge lid, the lower portion of the vertical guide moves outward and the spring is compressed. The vertical guide is located on the opposite side of the load engagement mechanism as the linear actuator so that it does not interfere with the movement of the arm as the arm moves over the dagger point to latch the lifting eye of a barge lid. The vertical guide system includes a spring system 340 and a hinge.

[0109] The spring system 340 includes a bolt 344 mounted through the vertical guide 338 and the bracket 337. A spring 342 is mounted around the bolt 344 and may be compressed between the vertical guide and the bracket as the vertical guide moves in relation to the bracket which in turn causes movement about the hinge. A spacer 348 and a nut 350 are mounted on the bolt 344 to adjust the spring system 340. The hinge includes a hinge pin 352 that is retained in a set of lugs 354a, 354b mounted to the vertical guide 338 and a set of lugs 353a, 353b mounted to the bracket 337. A spring is retained in a bolt above the hinge. A castle nut 350 secures a spacer 348 (or a series of flat washers) on the bolt 344.

[0110] Referring to FIG. 29, a top view of a load engagement mechanism and vertical guide is shown. Rather than extending out over the load engagement mechanism (the guide post extends away from the lower frame and the load engagement mechanism at an angle such that it does not interfere with the movement of the arm 460. The angle of the guide post in relation to the vertical guide is preferably between about 30 and about 60, most preferably about 45. In the illustrated embodiment, the spring 342 is comprised of approximately 15-25 Belleville washers arranged in an alternating pattern with one flat washer at either end. The Belleville washers function as a spring that is compressed when the vertical guide contacts the side of a barge lid. The position of the vertical guide is adjustable by adding or removing flat washers from the spring system. The castle nut 350 functions as a locking device. The bolt may have one or more holes through which a cotter pin may be inserted. The cotter pin may engage the crenellated portions of the castle nut to prevent the nut 350 from becoming loosened.

[0111] Referring to FIG. 30, each of the connecting rods 334 of the lower frame comprises an intermediate portion that is hollow and welded to rod end portions 358. At each rod end portion 358, the rod end is retained in a spherical bearing 362 inside a bearing housing 360 that is mounted or welded to the curvilinear side beam 332 and a bearing housing support plate 361 that is welded to the upper and lower flanges of the curvilinear side beam 332. The spherical bearing housing retains the outer portion 362a and the inner portion 362b of the spherical bearing. The rod end portions extend through the side beams and are retained by a nut 364 having a set screw 372. The rod end surface extends on the outside of the side beam and this outer portion of the rod end portion 358 has a smaller diameter than the connecting rod 334. The spherical bearings allow rotational movement between the connecting rods and the side beams. Over the nine foot length of each connecting rod, the rotational movement in the spherical bearings results in about 2 to 10 inches in relation to a direction normal to the interior surface of the curvilinear side beam. This independent movement allows the lower frame to be semi-rigid.

[0112] Referring to FIG. 31, a third example embodiment of a barge lid lifter system 300 is shown. This third embodiment is provided with reference numerals that track like structures in the first embodiment, the first embodiment denoted by a series of reference numerals starting with 100, the second embodiment denoted by a series of reference numerals starting at 300, and the third embodiment denoted by a series of reference numerals starting at 500.

[0113] The barge lid lifter system 500 includes an upper frame 502 connected to an oblong link 504 using a cable bridle 506, and a lower frame 503 connected to the upper frame 502 by a plurality of cables 527a-527d. The oblong link 504 can be attached to a crane hook (not shown) or other lifting means. The illustrated embodiment shows cable anchor points 508a-508d attached to the upper frame 502. The oblong link 504 is configured to accept a hook suspended from a crane or an overhead hoist. Alternate embodiments may include a frame with different anchor points configured to accept plate lifters, grapplers, container spreaders and other lifting systems for lifting balanced or unbalanced loads when weight is distributed over several points.

[0114] When the barge lid lifter system 500 is landed on a barge lid, the lower frame rests on the barge lid, which creates slack in one or more of the cables that join the upper frame and the lower frame. This two-piece frame allows the crane to support the upper frame such that only the weight of the lower frame needs to be supported by the barge lid.

[0115] The upper frame 502 includes two side beams 510a, 510b and two end beams 512a, 512b. Horizontal bracing plates 514a-514b provide support between the side beams and end beams, and horizontal bracing beams 316a-316d are provided beneath the side beams 510a, 510b. A first housing 518 and a second housing 520 are mounted between horizontal side bracing beams 516a-516b of the upper frame 502. The first housing 518 contains a remote transmitter control system and is preferably water-tight to protect the remote transmitter control system from the elements. The remote transmitter control system may include relays, a programmable logic controller (PLC), radio communication equipment, and wiring. The second housing 320 contains a battery system to power the remote transmitter control system and the load engagement mechanisms 522a-522d of the barge lid lifter system 500. Other means of providing power to the barge lid lifter system 500 may include pneumatic power, hydraulic power, and mechanical power.

[0116] Indication lights 530 are provided on the sides and/or ends of the upper frame 502 to communicate the status of the load engagement mechanisms 522a-522d to crane operators, dock workers, and others working on land. In the illustrated embodiment, indication lights 530 are provided on the dock side of the upper frame of the barge lid lifter system 500.

[0117] The lower frame 503 comprises two curvilinear side beams 532a-532b. The curvilinear side beams include upper anchor points 528a-528d and are joined by connecting rods 534a-534d. The ends of the connecting rods are retained in spherical bearings mounted on the curvilinear side beams. Each bearing housing is mounted by a bearing housing support plate that is welded to the upper and lower flanges of the curvilinear side beam. See FIG. 29. Four vertical beams 524a-524d are adjustably mounted on the four corners of the lower frame 503 via a slider mount assembly.

[0118] Referring to FIG. 32, a dock side view of the barge lid lifter system 500 shows that each vertical beam comprising a load engagement system is attached to the lower frame via a slider mount system. This enables adjustment of the position of the vertical beams in the fore direction and aft direction relative to the lower frame to accommodate barge lids having different dimensions. In the illustrated embodiment the adjustable slider mounts are at an initial setting such that the distance between the midpoint of each W.sub.A is approximately 9 feet, in this example.

[0119] Referring to FIG. 33, a top view of the lower frame 503 of the barge lid lifter system is depicted. Each slider mount assembly 652a-652d is mounted on either end of the side beams 532a-532b.

[0120] Referring to FIG. 34, a side view of the lower frame of the barge lid lifter system shows the distance W.sub.B between the midpoint of the dagger point 628b of load engagement mechanism 522b and the dagger point 628d of load engagement mechanism 522d is approximately 29 feet, in this example.

[0121] The distance W.sub.C between the dagger point of the load engagement mechanism and the respective guide is approximately 6.5 inches, in this example. As the barge lid lifter system is lowered into place atop a barge lid, the guides contact the side of the barge and aid in positioning the load engagement mechanisms over the lifting eye of each of the lifting assemblies.

[0122] Referring to FIG. 35, a side view of a slider mount assembly 652b is shown. The slider mount assembly 652b includes a plate 656b that is bolted to a flange 651b of the lower frame (not shown). Each plate 655b has an upper flange having an upper machined surface 662b and a lower flange having a lower machined surface 663b. Each bracket 654b has upper hooks 655b and lower hooks 657b that are complimentarily shaped to fit against the upper and lower flanges of the plate. Each bracket 654b is mounted to a respective vertical beam 524b via a horizontal pivot pin 653b. The upper hooks 655b and lower hooks 657b have smooth, machined surfaces to facilitate sliding along the plate 655b in a lateral (left to right) direction. A bracket 654b is adjustably mounted onto the plate such that it can slide laterally along the plate 655b when the locking assembly 659b is disengaged from the lower flange.

[0123] The load engagement mechanism 522b is mounted at the bottom (distal) portion of the vertical beam 524b. The guide post 536b is mounted above the load engagement mechanism 522b and below the horizontal pivot pin 653b. The bumper plate 661b is mounted at the top of the vertical beam 524b, above the horizontal pivot pin 653b.

[0124] The lower portion of each vertical guide 538b forms a rounded portion 539b. The rounded portion is curved such that when the rounded portion contacts the edge of a barge lid, the lower portion of the vertical guide moves outward as the vertical beam 524b rotates about the horizontal pivot pin 653b and the bumper 660b is compressed.

[0125] Referring to FIG. 36, a dock side view of the slider mount assembly 652b shows a row of teeth 664b disposed on the lower flange of the plate 655b. The teeth provide a plurality of locations for the locking assembly 659b to secure the bracket 654b in a fixed location relative to the plate 655b. The vertical guide is located on the opposite side of the load engagement mechanism 522b as the linear actuator so that it does not interfere with the movement of the arm as the arm moves over the dagger point to latch the lifting eye of a barge lid.

[0126] Referring to FIG. 37, a perspective view of the slider mount assembly 652b is shown. A horizontal pivot pin 653b secures the vertical beam 524b to the bracket 654b.

[0127] Referring to FIGS. 38a-d, the adjustable nature of the slider mount assembly 652a allows a bracket 654a and respective vertical beam 524a of the barge lid lifter system 500 to be mounted to the left side of the plate 655a (FIGS. 38a-38b) or to the right side of the plate 655a (FIGS. 38c-38d). In this example embodiment, this lateral adjustment allows for the barge lid lifter system to fit barge lids having lifting assemblies 136a,b that are mounted at a distance W.sub.A between approximately 8 feet and 10 feet apart on the dock side of the barge. See FIGS. 4 and 32.

[0128] Referring to FIGS. 39a-39b, front and rear views of the slider mount assembly are included. The front side of the bracket 654 includes a pivot pin sleeve, an upper plate 658, and a stop. The bumper 660 is mounted to the upper plate via a bolt.

[0129] The upper hooks 656 and lower hooks 657 have machined surfaces that fit against corresponding machines surfaces on the upper flange 662 and lower flange 663 of the plate 655 to provide a close fit. These machined surfaces are preferably lubricated so that one can slide the bracket 654 along the plate 655 by hand. The locking assembly 659 includes a spring-loaded plunger that can be operated by hand. Once the plunger handle is pulled down, the upper point of the plunger is below the teeth 664 of the plate 655 and the locking assembly 659 is disengaged. With the locking assembly 659 disengaged, a dockworker can move the bracket 654 and vertical beam 524 fore or aft (left or right) and then release the plunger handle. When the plunger handle is released, the spring causes the plunger to reengage the teeth 664 of the plate 655.

[0130] Referring to FIGS. 40a-40b, the vertical beam 524 includes a horizontal pivot pin 653 held in place by a pivot pin retaining pin. The horizontal pivot pin sleeve 578 of the load engagement mechanism (not shown) is positioned at the bottom of the vertical beam 524. The top half of the vertical beam 524 comprises a proximal portion 665 and the bottom half of the vertical beam 524 comprises the distal portion 667. The proximal portion 665 comprises the bumper plate 661, the horizontal pivot pin 653 (held in place by a ring pin), and the distal portion 667 comprises four bolt holes for attachment of a guide post 536 (see FIG. 37) and the horizontal pivot pin sleeve 574 of the load engagement mechanism (not shown).

[0131] Referring to FIGS. 41a-41b, the vertical beam 524 is shown in a first position such that the beam hangs parallel to the plate, and the bumper 660 is not compressed and a second position such that the vertical beam is tilted approximately three degrees such that the bumper 660 is compressed between the bumper plate 661 of the vertical beam 524 and the upper plate of the bracket. In the first position the distance W.sub.D between the vertical guide 538 and the vertical plane of the plate 655 is approximately 20 and 5/16 inches, in this example embodiment. In the second position the distance W.sub.E between the vertical guide 538 and the vertical plane of the plate 655 is approximately 23 and inches, in this example embodiment.

[0132] Referring to FIGS. 42a-42c, perspective view and a front view of the load engagement mechanism 522 are shown. The load engagement mechanism 522 has a frame 562 that includes a first side plate 566, a second side plate 568, a top plate 570, a horizontal pivot pin 572, and a dagger plate 576. The first side plate 566 and second side plate 568 are welded to the top plate 570 and the dagger plate 576. The horizontal pivot pin 572 extends between the first side plate 566 and the second side plate 568 and is retained in a horizontal pivot pin sleeve 574 that is welded to the vertical beam 524. A grease fitting 578 (FIG. 40) is provided on the horizontal pivot pin sleeve 574 to lubricate the horizontal pivot pin 572. The components comprising the frame 562 of the load engagement mechanism 522 may be constructed of a high-strength low carbon alloy steel such as A572.

[0133] The first side panel 566 of the load engagement mechanism 522 includes a vertical hinge at a forward end. The vertical hinge secures a rotation plate 608 to the first side plate 566 and allows the rotation plate 608 to turn about a vertical axis. The rotation elbow 596 is connected to the forward portion of the shaft of the linear actuator 564 and is welded to the rotation plate 608. The arm 560 is welded to the rotation plate 608 at a first end and has a second end that extends horizontally outward. The second end of the arm 560 extends toward the second side plate 568 in the unlatched position. When the shaft of the linear actuator 564 extends, the shaft moves forward in the cylinder and causes the rotation plate to rotate about the vertical hinge. As the rotation plate 608 turns, the second end of the arm 160 moves over the dagger point 616 and toward the vertical beam 524.

[0134] The dagger plate having an upper portion (the dagger point 616) and a bottom surface 628 that extends the entire width of the of the dagger plate 576.

[0135] The embodiments detailed above may be combined, in full or in part, with any alternative embodiments described.

INDUSTRIAL APPLICABILITY

[0136] Important advantages of the barge lid lifter system include load engagement mechanisms that use arms to retain the lifting eyes of barge lid lifting assemblies, linear actuators for deploying the arms, and a horizontal frame capable of hoisting a barge lid. Another important advantage of the lift beam system is the combination of remote communication to verify the status of load engagement mechanisms and remote latching to engage barge lid lifting eyes without putting a dock worker over water.

[0137] The use of the terms a and an and the and similar references in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., such as) provided herein, is intended merely to better illuminate the disclosure and does not pose a limitation on the scope of the disclosure unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the disclosure.

[0138] Numerous modifications to the present disclosure will be apparent to those skilled in the art in view of the foregoing description. Various embodiments of this disclosure are described herein, including the best mode known to the inventors for carrying out the disclosure. It should be understood that the illustrated embodiments are exemplary only, and should not be taken as limiting the scope of the disclosure.