Patent Grant
11673783
A wide variety of potential practical and useful embodiments will be more readily understood through the following detailed description of certain exemplary embodiments, with reference to the accompanying exemplary drawings in which:
Certain exemplary embodiments can provide a system comprising a rotatable aerial platform. The rotatable aerial platform comprises a yoke assembly, an annular base member, an upper frame, a chain drive, and a load supporting deck. The annular base member is coupled to the yoke assembly. The load supporting deck coupled to the upper frame, the load supporting deck constructed to support personnel and materials. The rotatable aerial platform is rotatable and positionable about a vertical axis permitting access to elevated locations.
Certain exemplary embodiments provide a machine that is a rotating rectangular work stage/platform enclosed by a safety railing and gate system with dimensions adequate for handling personnel, equipment, and/or materials/supplies. The platform comprises a circular supporting framework mounted on steel receiving channels constructed to accept and lock onto the forks of a telehandler or other forklift truck. The receiving channels are welded to the circular carriage base and central pivot yoke. The platform is coupled to and rotates on the carriage base and yoke. The platform is coupled to the base and yoke by rollers and a central axle/pin. The rotation of the platform is actuated by an electrical motor, hydraulic motor, manual crank, hand wheel, or drill-driven shaft, which operates a chain drive system or cog-to-cog gear drive system. Electric and hydraulic motor powered systems are controlled by forward and reverse switching mounted on a user interface that comprises a pedestal and dashboard. The platform can be rotated continuously in either direction for the purpose of positioning workers, equipment, and/or materials and supplies to perform tasks at heights above the ground otherwise requiring scaffolding and ladders. The platform's safety devices comprise an OSHA compliant railing and gate system with personnel fall protection/harness connectors and baseboard, foot pedal-actuated rotation lock/brake, and fork lock/retainer pins. The rotation lock/brake release pedal is part of a control pedestal, which can be located just outside of the railing-enclosed standing area of the platform. The control pedestal is a fixedly coupled part of the rotating platform/standing area portion of the machine. The rotation lock/brake release pedal is coupled to a lever, which raises a spring-loaded deadbolt pin coupled to the rotating platform part of the machine. The deadbolt pin, when in the inserted/locked position (at all times when not retracted by the operator pressing the foot pedal), rests in an aperture in the vertical surface of the upper ring of the annular base member upon which the support rollers of the platform ride. There are multiple apertures of this type evenly spaced around the circumference of the flange. When the platform operator depresses the safety lock/brake release pedal, the lever coupled to the safety lock/brake release pedal also (while retracting the spring-loaded deadbolt pin) makes a connection to complete an electrical circuit to supply power to a forward/reversing rocker switch mounted on the control pedestal. The rocker switch sends power to a motor. A sprocket is mounted on the shaft of the motor and drives a chain that encircles the lower circumference of the annular base of the support frame on which the standing area/platform rotates. The chain links catch on dogs/pins protruding from the circular rim of the annular base. Energizing the motor runs the sprocket (affixed to the motor shaft) on the chain causing the motor and platform to rotate around the stationary support carriage of the supporting frame, which can be mounted to telehandler or forklift forks. Rocking the switch to the right causes the platform to rotate to the right (clockwise as viewed from above). Rocking the switch to the left rotates the platform to the left (counter-clockwise).
A forklift or telehandler operator trained to operate the lifting machinery can engage a platform machine by inserting forks of a forklift or telehandler into the fork receiving channels of an exemplary platform and then coupling two or more safety locking pins, such as one behind each fork, through holes in receiving channel pin tabs. One or more persons aboard the platform (separate from the operator) can enter/exit, load/unload equipment and materials via a gate located at each end of the platform (the ends being the sides of the rectangular platform with the smaller dimension). Personnel aboard the platform can wear fall protection harnesses. Upon entering the platform, personnel can clip/connect straps for fall-protection harness(s) to connection locations on a safety rail system. The platform can be lifted by the telehandler or forklift to an appropriate working height. The platform can be rotated into a desired position by one of the persons aboard the platform using controls for the platform rotation system. Rotation controls are located on a pedestal fastened to the frame of the platform. In order to rotate the platform, the person operating the rotation system will press down a foot pedal to release the safety rotation lock/brake. The foot pedal actuates a lever, which retracts a spring-loaded safety deadbolt/pin and also completes an electrical connection to power a rotation drive motor (as described infra). While holding the foot pedal in a depressed position, an operator/worker moves a switch mounted on the pedestal to the right or to the left. As the switch is moved to the right or left, the drive motor is energized and will turn a drive sprocket affixed to the motor shaft. Moving the switch to the right energizes the motor to drive the sprocket in a direction that causes the platform to rotate to the right (clockwise as viewed from above the platform). Moving the switch to the left energizes the motor to drive the sprocket in a direction that causes the platform to be rotated to the left (counter-clockwise). The drive sprocket connects with a chain and will run along the chain to cause the platform to rotate around the stationary support framework which is mounted on the forks of the lifting machinery (the telehandler or forklift) as described in the machine description. The platform can be rotated in either direction to achieve desired positioning to perform tasks at hand.
Certain exemplary embodiments provide systems, devices, and/or methods for transporting, lifting, and positioning movable platforms on powered industrial vehicles. Such embodiments elevate and permit work persons to place themselves and materials in any desired position for carrying out desired operations. Certain exemplary embodiments provide a rotatable aerial platform, which can be utilized with forklift trucks.
Powered industrial vehicles such as lift trucks are used to lift and transport materials and personnel. Forklift vehicles are distinguished by an elevator guided to travel up and down on upright guides suitably mounted on the forklift vehicles and provided with horizontal outwardly projecting arms often referred to as “forks” on which a load may be placed for transportation. These vehicles have mechanisms and systems under control of the driver by which an elevator may be raised or lowered.
Forklift vehicles are able to pick up and deposit loads. Certain exemplary embodiments provide a movable platform, (which becomes the primary load), to facilitate placement of secondary loads (i.e. personnel, equipment, and/or materials) in narrow spaces where space for positioning the forklift vehicle might be limited. Ground-level building site spaces adjacent to doorways or constrained areas are more readily accessible utilizing exemplary movable platforms.
During construction of buildings and other structures, it is often helpful to lift workers and materials to elevated levels and positions. A powered industrial truck such as a telescopic boom forklift vehicle intended for lifting and moving loads can comprise a chassis section, a lifting section, and/or a control unit. The lifting section can comprise a boom assembly and a slewing mechanism, the boom assembly can be supported on the chassis section and comprises a telescopic boom, on the working end of which may be fitted forklift arms for receiving a platform. The control unit can comprise a chassis control, which controls the chassis section, and a boom assembly control, which controls the boom assembly. The control unit can be constructed for operation from outside an unmanned telehandler. The chassis section can comprise stands for either of a wheeled or of a tracked telehandler chassis, which stands enable a transfer of the telehandler from one worksite location to another and on which may be supported the lifting section including the boom assembly and the slewing mechanism intending for rotating the same. Telehandlers can comprise telescopic or articulated booms to position aerial deck and platforms at selected elevations. Certain exemplary embodiments facilitate positioning a platform substantially flush to a vertical surface or in close proximity to wall intersections/corners, or within an interior corner of a building or substantially flush with the edge of a roof or vertical wall. Certain exemplary embodiments facilitate improved alignment of elevated platforms.
Certain exemplary embodiments facilitate elevating workers and/or materials, and can be rotated to conform the deck of the platform to a desired position relative to a structure regardless of the position of the lift vehicle or other lifting mechanism.
Certain exemplary embodiments provide a rotatable aerial platform constructed for elevating and supporting a load on forks of a forklift vehicle while such load is being moved or rotated such that a side of the rotatable aerial platform is positionable at an angle within an interior corner or flush up against a surface of a structure.
Certain exemplary embodiments provide a rotatable aerial platform that can be positioned by a worker on the rotatable aerial platform.
Certain exemplary embodiments provide a rotatable aerial platform that can be locked into position by a worker on the platform. Certain exemplary embodiments provide a rotatable aerial platform that is economical and easy to use.
Certain exemplary embodiments provide a rotatable aerial platform that comprises a rotatable upper frame, a load supporting deck, an annular base member and yoke assembly, and forklift arm receiving channels.
In certain exemplary embodiments, arm receiving channels are coupleable to forklift arms, which channels are constructed for use with lifting forks such as forklift vehicles, and heavy machines or telehandlers having telescopic booms.
As shown in
As illustrated in
As shown in
As shown in
The annular base member 1800 can comprise an upper ring 1840, bottom ring 1820, a center hub 1850 and pivot plate 1860, plurality of radially spaced spokes 1880, an annular flange 1890 having an upper surface and a bottom surface. Center hub 1850 and pivot plate 1860 has a central aperture 1865 for receiving a pivot in the form of a pivot 1895 (e.g., a shaft or pin) that is rotatably received in central aperture 1865 defined in center hub 1850, which permits turning of upper frame on the annular base portion, as further described herein. Upper frame 1200 rotates about pivot 1895 relative to yoke assembly 1900. Upper surface of annular flange 1890 is constructed to engage with a plurality of rollers 1295 via which rotatable aerial platform 1000 rotates. Rotatable aerial platform 1000 rotates about center hub 1850. Radially spaced spokes 1880 are fixedly coupled to and provide support for center hub 1850 and pivot plate 1860.. Bottom ring 1820 of annular base member 1800 comprises a plurality of circumferentially spaced removable dogs 1898 threaded through the ring from its inner surface to and protruding beyond its outer surface for the purpose of resisting slippage of the chain around the circumference of bottom ring 1820. Bottom ring 1820 of annular base member 1800 comprises a plurality of circumferentially spaced protrusions 1899. Plurality of radially spaced protrusions 1899 are disposed on an outer surface of bottom ring 1820 of annular base member 1800 and serve as guides to align the chain upon the dogs.
Annular base member 1800 forms a wheel-like turntable, which is disposed horizontally, and which comprises annular flange 1890 horizontally extending from outer surface of annular base member 1800, as will be further described herein. A plurality of radially spaced spokes 1880, preferably four in number, are disposed within annular base member 1800 and fixed at their outer ends to the inner periphery thereof. At their inner ends, plurality of radially spaced spokes 1880 abut against and are secured in connection with center hub 1850, which center hub 1850 defines a central aperture 1865 therethrough.
Annular base member 1800 comprises an annular flange 1890 extending perpendicularly from outer circumferential surface thereof. A top surface of annular flange 1890 forms a raceway for plurality of rollers 1295 which are mounted on a bottom surface of the longitudinal side beams 1220, 1240 comprised by upper frame 1200. Annular base member 1800 comprises plurality of circumferentially spaced removable dogs 1898 threaded through a respective plurality of perforations through bottom ring 1820 and a plurality of circumferentially spaced protrusions 1899 which are disposed on the outer surface of bottom ring 1820 of annular base member 1800 to thereby guide the links of chain 1980 to align with dogs 1898. Plurality of rollers 1295, which can be coupled to upper frame 1200, are each in contact with annular base member 1800. Rotatable aerial platform rotates via plurality of rollers 1295.
A pivot plate 1205 having a generally circular shape is seated in upper frame 1200 and secured by welding to pivot plate support beams 1292 of upper frame 1200. Pivot plate support beams 1292 are fixed by welding at their outer ends to upper frame crosspiece beams 1290, 1290, 1290, 1290. Pivot plate 1205 overlies and is coterminous with center hub 1850 of annular base member 1800. Pivot plate 1205 comprises central pivot circular aperture 1215 axially aligned with central aperture 1865. A pivot 1895 extends downwardly through central pivot circular aperture 1215 in pivot plate 1205 and central aperture 1865 of center hub 1850, respectively. Pivot 1895 comprises a radial shoulder, which engages an upper surface of pivot plate 1205 seated in upper frame 1200. Pivot plate 1205, longitudinal pivot plate support beams 1292 and upper frame crosspiece beams 1290, 1290, 1290, 1290 surrounds and is rotatable about pivot 1895. Upper frame longitudinal side beams 1220, 1240 carry mounted on their bottom sides a plurality of rollers 1295 which rest on a flat top surface of annular flange 1890 of annular base member 1800 and on which in turn rests the upper frame 1200 and load supporting deck 1600 which is centered by the pivot 1895. Plurality of rollers 1295 may be hardened steel rollers or any suitable material for providing an antifriction bearing for the upper frame 1200. One having ordinary skill in the art will understand that the term “pivot” is used in a functional sense indicating a generally cylindrical structural member that couples an axle or center of a wheel or gear that allows or causes it to turn or rotate. Examples pivots comprise pins, shafts, kingbolts, rods, and/or bars, etc. Those of skill in the art will understand that any suitable connecting member can be used in forming a pivot.
As shown in
The load supporting deck 1600 is secured to the upper frame 1200. Load supporting deck 1600 comprises two opposed side edges and two opposed end edges. As shown in
The upper frame 1200 further comprises an upstanding flange along outer edge bounding the load supporting deck 1600. Load supporting deck 1600 can comprise a slip resistant surface for protection of personnel against slipping or skidding thereupon.
As shown in
Materials suitable for fabrication of the upper frame 1200, annular base member 1800, and yoke assembly 1900 can comprise steel, aluminum, metal alloys, and/or any durable, sturdy materials having suitable properties.
Forklift vehicles are commonly made with provisions for adjustment of the fork arms toward and from each other, and the arm receiving channels are located at a distance apart which is within the range of such adjustment and they are also located as near as possible to the outside edges of the annular base member to afford stability without undue material strain. The form lift arm receiving channels are made with dimensions closely approximating the cross section of the forklift arms, with sufficient clearance to permit easy entrance and withdrawal of the forklift arms. Yoke assembly 1900 is coupled to upper frame 1200 clear of the fork; and the sprocket drive and motor are mounted in a position where it will not interfere with the fork arms when entered into the forklift arm receiving channels. When not in use, the annular base and arm receiving channels rest on or may be supported from the floor on blocks or any other convenient standard with the arm receiving channels at a height between the limits of upward and downward travel of the fork. It may then be mounted on the fork by advancing the telehandler or forklift vehicle such that the fork arms are entered into and received within the arm receiving channels and by raising the vehicle elevator or telescopic boom lift arms. Conversely, the aerial platform is disengaged from the fork lift vehicle by the action of lowering the raised elevator, boom or lift arms until the channels underlying the annular base member rests on the ground surface or on its supporting blocks or standard, and backing off the vehicle or telehandler.
When rotatable aerial platform 1000 is thus coupled to lift arms of a forklift vehicle or the telescopic boom of a telehandler class vehicle, the motor is coupled with the chain drive system.
Alternative motors: a hydraulic motor coupled to drive sprocket 1038 and powered by hydraulic accessory systems, which are part of the fork lift or other lifting vehicle; or a drive shaft coupled to drive sprocket 1038 and mounted to the control pedestal 1086 in such a way as to allow the coupling of either of a manual crank or a forward and reversing drill.;
Via rotatable aerial platform 1000, personnel and materials can be carried by a forklift telehandler vehicle and elevated and positioned in a location proximate to or flush with a vertical wall, roof, or interior corner, as well as in other locations which could not be reached owing to limited maneuverability of forklift type vehicles.
When the following terms are used substantively herein, the accompanying definitions apply. These terms and definitions are presented without prejudice, and, consistent with the application, the right to redefine these terms during the prosecution of this application or any application claiming priority hereto is reserved. For the purpose of interpreting a claim of any patent that claims priority hereto, each definition (or redefined term if an original definition was amended during the prosecution of that patent), functions as a clear and unambiguous disavowal of the subject matter outside of that definition.
Still other substantially and specifically practical and useful embodiments will become readily apparent to those skilled in this art from reading the above-recited and/or herein-included detailed description and/or drawings of certain exemplary embodiments. It should be understood that numerous variations, modifications, and additional embodiments are possible, and accordingly, all such variations, modifications, and embodiments are to be regarded as being within the scope of this application.
Thus, regardless of the content of any portion (e.g., title, field, background, summary, description, abstract, drawing figure, etc.) of this application, unless clearly specified to the contrary, such as via explicit definition, assertion, or argument, with respect to any claim, whether of this application and/or any claim of any application claiming priority hereto, and whether originally presented or otherwise:
Moreover, when any number or range is described herein, unless clearly stated otherwise, that number or range is approximate. When any range is described herein, unless clearly stated otherwise, that range includes all values therein and all subranges therein. For example, if a range of 1 to 10 is described, that range includes all values therebetween, such as for example, 1.1, 2.5, 3.335, 5, 6.179, 8.9999, etc., and includes all subranges therebetween, such as for example, 1 to 3.65, 2.8 to 8.14, 1.93 to 9, etc.
When any claim element is followed by a drawing element number, that drawing element number is exemplary and non-limiting on claim scope. No claim of this application is intended to invoke paragraph six of 35 USC 112 unless the precise phrase “means for” is followed by a gerund.
Any information in any material (e.g., a United States patent, United States patent application, book, article, etc.) that has been incorporated by reference herein, is only incorporated by reference to the extent that no conflict exists between such information and the other statements and drawings set forth herein. In the event of such conflict, including a conflict that would render invalid any claim herein or seeking priority hereto, then any such conflicting information in such material is specifically not incorporated by reference herein.
Accordingly, every portion (e.g., title, field, background, summary, description, abstract, drawing figure, etc.) of this application, other than the claims themselves, is to be regarded as illustrative in nature, and not as restrictive, and the scope of subject matter protected by any patent that issues based on this application is defined only by the claims of that patent.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2410373 | Westervelt, Jr. | Oct 1946 | A |
| 3022854 | Eckels | Feb 1962 | A |
| 3062504 | Blanchard | Nov 1962 | A |
| 3709322 | Mitchell | Jan 1973 | A |
| 4356887 | Fisher | Nov 1982 | A |
| 5497851 | Walcher | Mar 1996 | A |
| Number | Date | Country |
|---|---|---|
| 4231843 | Mar 1994 | DE |
