Patent Application
20210309498
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
The disclosure relates to lift devices and more particularly pertains to a new lift device for automatically lifting cargo on a scaffold.
The prior art relates to lift devices and the prior art discloses a motorized scaffold platform for lifting and lowering a work surface. Additionally, the prior art discloses a novel drive unit for lifting and lowering a scaffolding platform along vertical cables. The prior art discloses a scaffold hoist that includes a winch and a cable and which is mounted atop a leg of scaffolding. The prior art also discloses a portable hoist for lifting heavy objects that includes wheels for rolling on a support surface. The prior art discloses a vertical lift member that includes slidable elements for improving safety of a stanchion climbing hoist.
An embodiment of the disclosure meets the needs presented above by generally comprising a pair of supports is each mountable to a respective outrigger of scaffolding. A winch unit is positionable on the supports when the supports are mounted on the scaffolding and the winch unit has a cable extending downwardly therefrom. The cable is lowered or lifted when the winch is actuated. A receiver is coupled to the winch unit and the receiver is in electrical communication with the winch unit. A remote control is provided that is carried by a user and the remote control is in wireless electrical communication with the receiver. In this way the user can remotely lift and lower the cable for lifting and lowering cargo.
There has thus been outlined, rather broadly, the more important features of the disclosure in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the disclosure that will be described hereinafter and which will form the subject matter of the claims appended hereto.
The objects of the disclosure, along with the various features of novelty which characterize the disclosure, are pointed out with particularity in the claims annexed to and forming a part of this disclosure.
The disclosure will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
With reference now to the drawings, and in particular to
As best illustrated in
A winch unit 24 is positionable on the supports 12 when the supports 12 are mounted on the scaffolding 16 such that the winch unit 24 is spaced upwardly from a support surface on which the scaffolding 16 is positioned. The winch unit 24 has a cable 26 extending downwardly therefrom. The cable 26 is extended outwardly from the winch unit 24 when the winch unit 24 is actuated into a lowering condition. Conversely, the cable 26 is retracted into the winch unit 24 when the winch unit 24 is actuated into a lifting condition. In this way the winch unit 24 can lift or lower building materials, tools, equipment or any other heavy objects that are commonly lifted during the course of a construction project.
The winch unit 24 comprises a housing 28 that has a first end 30, a second end 32 and an outer wall 33 extending therebetween, and the housing 28 is elongated between the first end 30 and the second end 32. The outer wall 33 has a top side 34, a bottom side 36, a front side 38 and a back side 40. The bottom side 36 has a cable aperture 42 extending into an interior of the housing 28 and the cable aperture 42 is centrally positioned between the first end 30 and the second end 32. A suspension loop 44 is coupled to the top side 34 of the outer wall 33 of the housing 28 and the suspension loop 44 can be attached to a suspension line for suspending the housing 28 therefrom. The suspension loop 44 is centrally positioned between the first end 30 and the second end 32 for balancing the housing 28 when the housing 28 is suspended.
A winch 46 is positioned within the housing 28, the winch 46 is aligned with the cable 26 opening and the cable 26 is coupled to the winch 46. The winch 46 turns in a first direction when the winch 46 is turned on for lifting. Additionally, the cable 26 is wrapped around the winch 46 when the winch 46 turns in the first direction to lift a load attached to the cable 26. The winch 46 turns in a second direction when the winch 46 is turned on for lowering. Additionally, the cable 26 is unwrapped around the winch 46 when the winch 46 turns in the second direction to lower the load attached to the cable 26. The winch 46 may be an electric winch that has a lifting capacity of approximately 2000.0 pounds.
The cable 26 has a distal end 48 with respect to the winch 46 and a weight sensor 50 is coupled to the distal end 48 of the cable 26 where to sense the weight of the load on the cable 26. The weight sensor 50 is in electrical communication with the winch 46 and the weight sensor 50 sends a shut off signal to the winch 46 when the weight sensor 50 senses a weight that exceeds a pre-determined trigger weight. In this way the weight sensor 50 inhibits the winch 46 from being overloaded by the weight of the load attached to the cable 26. The weight sensor 50 may comprise an electronic weight sensor, a spring and a switch that is turned on when the spring is stretched to a trigger length or any other type of weight sensor.
A hook 52 is coupled to the weight sensor 50 thereby facilitating the load to be attached to the hook 52 for lifting and lowering. A pair of suspensions 54 is each coupled to the bottom side 36 of the outer wall 33 of the housing 28. Each of the suspensions 54 may comprise a hook or the like and cabling can be attached between the suspensions 54. In this way additional block and tackle can be added for increasing the weight capacity of the winch 46.
A plurality of spot lights 56 is provided and each of the spot lights 56 is coupled to the bottom side 36 of the outer wall 33 of the housing 28 to emit light outwardly therefrom. Each of the spot lights 56 is positioned adjacent to a respective one of the first end 30 and the second end 32 of the housing 28 and each of the spot lights 56 is electrically coupled to the winch 46. Each of the spot lights 56 is turned on when the winch 46 is turned on to illuminate the load. Each of the spot lights 56 may comprise an LED or other type of electronic light emitter.
A pair of handles 58 is each coupled to a respective one of the first end 30 and the second end 32 wherein for gripping and carrying the housing 28. A pair of tie downs 60 is each coupled to the outer wall 33 of the housing 28. Each of the tie downs 60 is positioned adjacent to a respective one of the first end 30 and the second end 32. Each of the tie downs 60 has a strap space 62 integrated therein and a tie down strap 64 can be extended through the strap space 62 for attaching the housing 28 to a structure.
A strobe light 66 is coupled to the front side 38 of the outer wall 33 of the housing 28 to emit light outwardly therefrom. The strobe light 66 is electrically coupled to the winch 46 and the strobe light 66 is turned on when the winch 46 is turned on. In this way the strobe light 66 visually alerts people to the potential danger of the load is lifted or lowered. The strobe light 66 may comprise an LED that emits red light or any other type of electronic light emitter. A horn 68 is coupled to the housing 28 to emit an audible alert and the horn 68 is electrically coupled to the winch 46. The horn 68 is turned on when the winch 46 is turned on to audibly alert people to the potential danger of the load is lifted or lowered. The horn 68 may be an electric horn similar to that which is found on motor vehicles.
A female electrical outlet 70 is integrated into the bottom side 36 of the outer wall 33 of the housing 28 to have a power cord 72 plugged therein. The female electrical outlet 70 is electrically coupled the winch 46 to deliver electrical current to the power cord 72. The female electrical outlet 70 may be a three prong outlet or the like and the power cord 72 may be a three prong power cord. A power supply 74 is positioned within the housing 28, the power supply 74 is electrically coupled to the winch 46 and the power supply 74 comprises at least one battery 76.
A receiver 78 is coupled to the winch unit 24 and the receiver 78 is in electrical communication with the winch unit 24. The receiver 78 is electrically coupled to the winch 46. The receiver 78 turns on the winch 46 for lifting when the receiver 78 receives a lift command. The receiver 78 turns on the winch 46 for lowering when the receiver 78 receives a lower command. The receiver 78 may comprise a radio frequency receiver 78 or the like.
A remote control 80 is provided that can be carried by a user and the remote control 80 is in wireless electrical communication with the receiver 78. The remote control 80 broadcasts the lift command to the receiver 78 when a lift button on the remote control 80 is depressed to facilitate the user to remotely actuate the winch unit 24 for lifting. The remote control 80 broadcasts the lower command to the receiver 78 when a lower button on the remote control 80 is depressed to facilitate the user to remotely actuate the winch unit 24 for lowering. The remote control 80 includes a transmitter 82 and the transmitter 82 is in electrical communication with the receiver 78. The transmitter 82 may comprise a radio frequency transmitter or the like.
A lift box 84 is provided that is attachable to the cable 26 thereby facilitating the winch unit 24 to lift or lower the lift box 84. The load is positionable in the lift box 84 thereby facilitating the winch 46 to lift or lower the load. The lift box 84 has a bottom wall 86 and a perimeter wall 88 extending upwardly therefrom, and the perimeter wall 88 has a distal edge 90 with respect to the bottom wall 86. A plurality of engagements 92 is each coupled to the distal edge 90 of the perimeter wall 88 of the box. The engagements 92 are spaced apart from each other and are evenly distributed around the distal edge 90. A plurality of rigging 94 is provided and the rigging 94 is coupled between each of the engagements 92 and the hook 52 on the cable 26. In this way the rigging 94 evenly distributes the weight of the load in the lift box 84 with respect to keeping the lift box 84 in a horizontal oriented during lifting and lowering.
In use, the scaffolding 16 is assembly to accommodate the winch unit 24 to be positioned at a preferred location for lifting and lowering the load. Each of the supports 12 is attached to the respective outrigger 14 of the scaffolding 16 and the housing 28 is positioned on top of the supports 12. Tie down strap 64s can be secured to each of the tie downs 60 on the housing 28 to secure the housing 28 to the scaffolding 16. The remote control 80 is manipulated to either lift or lower the lift box 84. In this way the load can be lifted without requiring the user to manually lift the load. Thus, the time required to lift a collection of bricks up to a rooftop, for example, is reduced as compared to carrying the bricks.
As is most clearly shown in
With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of an embodiment enabled by the disclosure, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by an embodiment of the disclosure.
Therefore, the foregoing is considered as illustrative only of the principles of the disclosure. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the disclosure to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the disclosure. In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be only one of the elements.
