Abstract: A post connection adapter for detachably fastening a scaffolding post to a support includes a fastening body having first and second fastening-body fasteners in first and second fastening-body fastening positions, respectively, and detachably fastenable to the support selectively by the first or second fastener. The first and second positions have a fastening position distance between each other of 72 mm. The post connection adapter includes a post connection body extending toward the post connection body axis and fastened to the fastening body. An imaginary center plane containing an imaginary center point between the first and second positions is offset by 20 mm perpendicular to the center plane and to the post connection body axis, with respect to a post connection body axis plane extending parallel to the center plane and containing the post connection body axis. A device has two identical post connection adapters detachably fastened to a support.

Abstract: A device for raising a temporary wall to enclose an area includes a main body, a drive wheel attached centrally to the main body, a motor mounted on the main body and configured to drive the drive wheel, and a hook portion attached each end of the main body. Each hook portion has an arm member extending from the main body, a wheel support member extending from the arm member, the wheel support member extending substantially parallel to the main body, a wheel attached to the wheel support member on a surface facing the main body, and a depth adjustment mechanism configured to adjust a depth of the device by adjusting a length of the arm member. The device also includes a width adjustment mechanism configured to adjust a width of a gap between the wheel support members and a loop member attached to the main body.

Abstract: Methods and apparatuses for performing automated operations using a high-density robotic cell. An apparatus comprises a first plurality of robotic devices; a second plurality of robotic devices; and a control system. Each of the second plurality of robotic devices is coupled to a single function end effector. The control system controls the second plurality of robotic devices to concurrently perform tasks at a plurality of locations on an assembly, while the first plurality of robotic devices independently maintain a clamp-up at each of the plurality of locations.

Abstract: A step ladder device for improving the safe working elevation of a step ladder is provided. The step ladder device includes a working ladder portion that terminates in a rigid working tray providing a safety grab bar. The step ladder device is dimensioned and adapted to piggyback on to the step ladder so that the working ladder portion slidably moves in a coplanar orientation relative to the underlying step ladder, which enables the working tray to be locked in one of a plurality of selective working elevations relative to the underlying step ladder. As a result, the user can embrace the safety grab bar and balance themselves while standing on the upper rungs of the underlying step ladder or the lower rungs afforded by the working ladder portion.

Abstract: Engine installation systems and related methods. An engine installation system includes an adapter cradle and a transport dolly. The adapter cradle is configured to support the engine, and the transport dolly is configured to be selectively and operatively coupled to the adapter cradle to support the adapter cradle to facilitate transporting the adapter cradle and the engine across a ground surface. The adapter cradle is configured to be selectively coupled to each of the transport dolly and the vehicle. The adapter cradle is configured to pivot relative to the transport dolly or relative to the vehicle to transition between a transport configuration and an upright configuration. In examples, methods of installing an engine within an engine bay of a vehicle include positioning the engine beneath the engine bay, pivoting the engine relative to the vehicle, and lifting the engine into the engine bay.

Abstract: A drive arrangement includes a movable, rotatable rail segment of an elevator system. An electric motor moves the movable rail segment. The drive arrangement is configured to rotate the rail segment about an angle of rotation of less than 360°. An inverter unit provides electrical power to the electric motor and is configured to receive a control command relating to the position of the movable rail segment and provide the electrical drive power based on the control command. The drive arrangement forms two or exactly three drive segments. Each drive segment includes an inverter unit and a coil arrangement, which is supplied with electrical power by the assigned inverter unit. Each inverter unit includes a communication unit, which receives the control command. The communication units are configured to specify amongst themselves a master communication unit and to specify the remaining communication unit as slave communication units.

Abstract: Embodiments of the present invention generally relate to a vehicle-mounted conveyor system, and more specifically a maneuverable and mobile system interconnected to a motor vehicle, such as a truck, for conveying products and material. In some embodiments, the conveyor system comprises: a first conveyor; a second conveyor; a conveyor mount, wherein the first conveyor is interconnected to the conveyor mount; a first plate; a second plate; a post interconnected to the first plate; an arm member interconnected on one end to the post and interconnected on a second end to the second plate; a first hydraulic cylinder interconnected to the post and the arm member; a rotator gear interconnected to the second plate and the conveyor mount; a second hydraulic cylinder interconnected to the conveyor mount and the rotator gear; and a vehicle stabilizer, wherein the conveyor system has a first travel position and a second deployed position.

Abstract: A desk having a bottom plate, a face plate movably coupled to the bottom plate by one or more support members, a motor configured to selectively move the face plate upward and downward with respect to the bottom plate, and a control mechanism. The control mechanism can have a first sensor device coupled to an upper surface of the bottom plate, the first sensor device having one or more first optical sensors, and a second sensor device aligned parallel to the first sensor device and coupled to a lower surface of the face plate, the second sensor device having one or more second optical sensors in communication with the one or more first optical sensors. The control mechanism can be configured to stop the motor from moving the face plate in response to an object between the first sensor device and the second sensor device.

Abstract: The aerial work platform comprises a control console (30) for moving the platform (20) to a working position at a height and for moving the chassis (2) on the ground in the forward (FAV) and backward (FAV) directions. To avoid confusing these two directions of movement because of the variable orientation of the console (30) with respect to the chassis (2), the direction of movement selected at the control console (30) is indicated to the operator by activation of at least one visual indication (63a, 64a, 64b, 70.i, 72) located on the side of the chassis (2) that corresponds to the direction of movement selected, or having a form pointing in the direction of movement (FAV, FAR) selected. A screen (40) also indicates the direction of movement (FAV, FAR) selected by a display transposing to the screen (40) the above visual indication system in relation to the azimuthal direction of the chassis (2) with respect to the console (30).

Abstract: A mesh handler for a mining machine includes a generally U-shaped frame arranged for receiving and positioning at least one mesh against a roof portion of an underground tunnel. The frame includes at least one generally U-shaped rail and a guide mechanism arranged for guiding the mesh along the rail in a direction substantially perpendicular to a longitudinal direction of the mining machine. Moreover, a mining machine including the mesh handler is provided.

Abstract: An apparatus for displacing an elevator car from its pathway includes a rotational vehicle configured to rotate around an axis of rotation and at least one guide rail section mounted with the rotational vehicle along, which at least one guide rail section the at least one elevator car is arranged to travel. The at least one guide rail section is mounted substantially parallel to the axis of rotation of the rotational vehicle. The rotational vehicle is configured to rotate 90 degrees. An elevator system is also disclosed.

Abstract: Embodiments of the present invention generally relate to a vehicle-mounted conveyor system, and more specifically a maneuverable and mobile system interconnected to a motor vehicle, such as a truck, for conveying products and material. In some embodiments, the conveyor system comprises: a first conveyor; a second conveyor; a conveyor mount, wherein the first conveyor is interconnected to the conveyor mount; a first plate; a second plate; a post interconnected to the first plate; an arm member interconnected on one end to the post and interconnected on a second end to the second plate; a first hydraulic cylinder interconnected to the post and the arm member; a rotator gear interconnected to the second plate and the conveyor mount; a second hydraulic cylinder interconnected to the conveyor mount and the rotator gear; and a vehicle stabilizer, wherein the conveyor system has a first travel position and a second deployed position.

Abstract: A support platform for enabling a worker to service an oil well next to a wellhead having a valve tree includes a platform having an upper floor, a lower floor and a cavity in between the floors. A platform provides a periphery, a central opening and radially extending beams. A plurality of walls attached to the periphery of the platform, said beams connecting to said walls below said upper floor. A drain that enables fluid to drain from the upper floor to the lower floor and into the cavity. A coupler that spans between the floors for enabling a connection to be made between the platform and valve tree. A liquid guard or other provision that disallows the escape of fluid from a floor via the central opening. One or more sleeves are provided in the cavity, each connecting to the upper floor, each sleeve having a bore that extends to and through the upper floor. Fluid that drains to the cavity is not able to escape the cavity via the sleeve or sleeve bore.

Abstract: A portable tower trailer having a light tower housing constructed to allow for both stacking and nesting which is beneficial in both storage and shipping of light towers is disclosed. The portable tower trailer employs a frame having a hinged axle that allows the wheels to operate in a conventional manner. The hinged axle further allows the wheels to be rotated upward allowing the frame to rest flush on the ground or stacked upon a similar shaped portable tower. The stackable light tower is constructed having a base employing an engine system and a fuel tank; and a mast pivotally coupled to the base and movable between a storage configuration and a positioning configuration. The storage configuration is when the mast is folded over an upper surface of the base whereby an additional light tower base or tower trailer may be placed or stacked over the top of the first light tower base.

Abstract: A rolling base comprises, for use, a pair of fastening plates for fastening to a foot of the mast, each plate having a symmetry axis; —three arms, each having an orientable castor, including one fixed arm in the extension of the symmetry axis of the plates, and two swivelling arms symmetrically arranged on either side of the fixed arm. Each plate comprises on each side of the symmetry axis at least three means for locking the swivelling arms in three different angular positions relative to the symmetry axis. For storage, each swivelling arm is parallel to the fixed arm and to the symmetry axis of the plates. For transport under load, each swivelling arm forms an angle to the symmetry axis of more than 105°. For vertical fastening position, each swivelling arm forms an angle to the symmetry axis of more than 90° and less than that in transport.

Abstract: A massage device includes a leg assembly that extends between a table top assembly and a surface. The leg assembly includes a first leg and a second leg that are coupled to one another. The first leg includes a first leg top that is coupled to the table top assembly, a first leg bottom that is positioned adjacent to the surface, and a first leg body that extends between the first leg top and the first leg bottom. The second leg includes a second leg top that is coupled to the table top assembly, a second leg bottom that is positioned adjacent to the surface, and a second leg body that extends between the second leg top and the second leg bottom. The second leg bottom includes a pair of fork members that are coupled to the second leg body, the fork members being positioned relative to one another to provide a pair of spaced apart contact points along the surface.

Abstract: An inspection lighting system including a first frame structure and a plurality of linear light arrays coupled to the first frame structure. Each of the linear light arrays have a plurality of integrated lights and at least one generally linear bracket. The integrated lights are arranged end-to-end, with each of the integrated lights having at least one T-slot along at least a portion of a length of the integrated light. The linear bracket coupling adjacent ones of the integrated lights together using the T-slots in the adjacent integrated lights.

Abstract: A rolling cart has a wheeled frame, telescoping vertically extendable members with glide strips, and a tiltable frame having glide strips interspersed with transfer balls to easily slide slabs or sheet materials for construction such as when installing countertops. The tiltable frame includes retractable lifter feet which support a slab in transit but drop below the level of the slab automatically when the tiltable frame is tilted to horizontal.

Abstract: A hand-held tool for supporting a horizontally-oriented panel, e.g. drywall, while installing the panel on a ceiling is provided. The tool has a gripping region, a plurality of spaced-apart elongated panel supports, a plurality of spaced-apart struts connecting the gripping region to the panel supports, and a holder configured to releasably retain fasteners for installing the panel of the ceiling. The tool is portable, easy to manage and quick to use.

Abstract: An elevation-type stair structure comprises: a first stair module, including plural first treads and a first wall surface having a first door and a second door; a second stair module, including plural second treads and a second wall surface having a third door and a fourth door; and an elevator module, enabling the first stair module or the second stair module to be ascended or descended, when the second stair module is ascended for being above a location defined at one side of the first stair module, the second door is aligned with the third door, when the second stair module is descended for being below a location defined at one side of the first stair module, the first door is aligned with the fourth door. Accordingly, a user can walk through the first stair module and the second stair module then return to an original location.

Abstract: A work implement frame having a top support and a bottom support. The top support and bottom support are tied together structurally by end plates and/or vertical ribs. One or more fork tines may be combined with the top or bottom support of the frame and are adapted to carry pallets or other loads as is know in the art. The frame includes a load rest to help support the load. The load rest is typically positioned near the top of the frame. A gate in the load rest is movable between an open position and a closed position. In its open position an operator may pass through the gate to enter the cab. The gate may be pivotally or slidably combined with the load rest.

Abstract: A lift device includes a chassis, tractive elements, a platform including a deck, a lift assembly, and a stair assembly. The lift assembly is configured to move the platform between a lowered position and a raised position. The stair assembly is coupled to at least one of the platform and the chassis and includes a first support and a second support extending parallel to one another. The stair assembly is repositionable between a stored position and a deployed position and facilitates access to the deck from the ground when in the deployed position. The first support extends farther outward horizontally than the second support relative to the chassis when the stair assembly is in the deployed position. The first support extends farther outward horizontally relative to the chassis when the stair assembly is in the deployed position than when the stair assembly is in a stored position.

Abstract: A device for guiding bracing cables in a tower of a wind turbine. The device comprises at least one guide bracket to be arranged in the tower between a tower wall and at least one of the bracing cables, such that the at least one bracing cable bears against the guide bracket and is thereby guided along the tower wall, and a bracket mount for attaching the guide bracket to the tower wall, wherein the position of the guide bracket in the circumferential direction of the tower along the bracket mount can be changed in order to match the position of the at least one bracing cable.

Abstract: The invention relates to a building access system (100) adapted to be arranged externally of a building comprising a number of storeys, comprising an elevator module (2) with an elevator shaft (2A) for an elevator and a mounting arrangement (3) for mounting to a wall (4) of the building. The access system further comprises at least one balcony module (1,1) comprising one or more balconies (1A,1A,1A,1B,1B,1B), each said balcony comprising a balcony door (16) for providing access to the elevator in a side wall (13). The balcony module (1,1) or modules comprises/comprise one or more separate modules adapted for connection to the building in association with the elevator module (2), or the elevator module and one or more balcony modules comprise an integrated elevator and balcony module. The mounting arrangement (3) is adapted for interconnecting the balcony and elevator modules with the wall (4) of the building.

Abstract: A transportation apparatus is described herein that comprises a lifting apparatus having a support structure, a base portion and a scissor-lift device disposed between the support structure and the base portion. The scissor-lift device having a first arm having a first end and a second end pivotally connected to a second arm having a first end and a second end. The first end of the first arm is hingedly connected to the base portion and the second end of the first arm is slidably engaged with the support structure. Similarly, the first end of the second arm is slidably engaged with the base portion and the second end of the second arm is hingedly connected to the support structure. A method of raising centrifuge equipment to a desired height via the lifting apparatus is also described herein.

Abstract: A vehicle lift assembly includes a base, a vehicle engagement member, an actuation assembly, and a lifting linkage assembly. The vehicle engagement member vertically actuates relative to the base member while interfacing with a vehicle in order to lift the vehicle relative to the base member. The actuation assembly drives the vehicle engagement member relative to the base member. The lifting linkage assembly connects the actuation assembly with the vehicle engagement member. The lifting linkage assembly also includes one or more longitudinally extending links, while one or more reinforcement plates are fixed to each of the longitudinally extending links, wherein each reinforcement plate is shorter than the respective link to which it is attached.

Abstract: A portable processing plant for processing granular material is provided. The portable plant includes a plurality of portable processing modules configured to be stacked vertically to allow for a vertically downward progression of the generally granular material through the portable processing plant. Each portable processing module includes a self-supporting independent frame structure and has at least one processing component affixed to the self-supporting independent frame structure. The self-supporting independent frame structures of the plurality of portable processing modules combine to define a structural skeleton of the portable processing plant. Each self-supporting independent frame structure can be removed from the structural skeleton substantially fully assembled while the at least one processing component carried by the self-supporting. Methods of assembling and disassembling the portable processing plant are also provided.

Abstract: A method and system for a scissors lift vehicle are provided. The scissors lift vehicle includes a carriage including a plurality of independently steerable wheels configured to engage a travel surface, the wheels including an axis of rotation and a circular profile having a radius R, the wheels spaced apart in a fore/aft direction and in a right/left direction.

Abstract: A support platform for enabling a worker to service an oil well next to a wellhead having a valve tree includes a platform having an upper floor, a lower floor and a cavity in between the floors. A platform provides a periphery, a central opening and radially extending beams. A plurality of walls attached to the periphery of the platform, said beams connecting to said walls below said upper floor. A drain that enables fluid to drain from the upper floor to the lower floor and into the cavity. A coupler that spans between the floors for enabling a connection to be made between the platform and valve tree. A liquid guard or other provision that disallows the escape of fluid from a floor via the central opening. One or more sleeves are provided in the cavity, each connecting to the upper floor, each sleeve having a bore that extends to and through the upper floor. Fluid that drains to the cavity is not able to escape the cavity via the sleeve or sleeve bore.

Abstract: A work platform includes a floor structure having a width dimension and a depth dimension and a safety rail coupled with the floor structure. A control panel area is cooperable with the safety rail and includes a sensor support bar having a top cross bar extending along the width dimension and side bars extending substantially perpendicularly from the top cross bar. Each of the side bars includes an upper section extending from the top cross bar inward in the depth dimension to a bent section, and a lower section extending from the bent section outward in the depth dimension to the safety rail. A platform switch that is configured to trip upon an application of a predetermined force may be attached to the sensor support bar. A switch bar may be secured to the control panel area, and the platform switch may be attached to the switch bar.

Abstract: A mooring assembly includes: a mooring buoy having a central axis, an upper ring portion providing an upper abutment surface; a mooring structure including a cavity with a wall receiving the mooring buoy; and a buoy locking system near the cavity engaging with the upper ring portion for locking the mooring buoy to the turret mooring structure and including at least two locking devices attached to the mooring structure, each locking device having a locking dog connected to a force member for axial displacement and exerting an upward force on the upper abutment surface. The mooring buoy includes a lower abutment surface. The locking system includes an engagement member below the locking dog, engaging with the lower abutment surface and exerting a downward force. The buoy at positions axially above the upper abutment surface situated at an axial clearance from the cavity wall.

Abstract: This invention concerns a light tower (10) having a main body (12) and a mast (26) extending from the main body (12) such that the mast (26) is extendable between a retracted configuration and at least one extended configuration. A lighting unit (34) is mounted to the mast (26). Supports (44), such as legs, are arranged to support the main body in use. Sensors (56) are provided for monitoring the load distribution of the light tower (10) between the supports (44). A controller (64) is configured to alter the load distribution of the light tower (10) according to a comparison between the monitored load distribution and a predetermined acceptable load distribution range.

Abstract: A system for levelling the column of a bucket truck, including a hydraulic cylinder, fulcrums for the cylinder located on a substructure, and a pedestal, and a pivot point for the pedestal allowing the column of the crane and a turntable to be positioned at 0° in relation to the horizontal plane, thereby increasing the working slope range both in the forward and backward direction up to 20° in relation to the chassis of the carrying vehicle.

Abstract: A variable shape three-dimensional structure includes: an upper frame; a lower frame; and a longitudinal coupling member that couples the upper and lower frames. Each of the frames includes cross units and an end coupling portion. Each cross unit is formed by two rigid members crossing each other and pivotally coupled together. The end coupling portion pivotally couples the ends of the rigid members of the cross units. The longitudinal coupling member includes a bent unit comprising a first and second bent rigid members, and a bent portion coupling shaft. The first and second bent rigid members are bent in a V-shape. The bent portion coupling shaft pivotally couples the bent portions of the first and second bent rigid members. The upper end of the bent unit is coupled to the upper frame and the lower end of the bent unit is coupled to the lower frame.

Abstract: In one aspect, an apparatus for manipulating a sheet includes a base portion, and an elevator portion coupled to the base portion, where the elevator portion is vertically movable relative to the base portion. The apparatus also includes a tilting portion pivotably coupled to the elevator portion, where a virtual plane is parallel to the tilting portion. In addition, the apparatus includes at least one first holder and at least one second holder coupled to the tilting portion, where at least one first holder and at least one second holder oppose each other.

Abstract: A stepless ladder is provided that may comprise a frame adapted to support the weight of a user, a track attached to a portion of the frame, an escalating member attached to the track, the escalating member for supporting the weight of the user, and an escalating assembly adapted to raise and lower the escalating member along the track.

Abstract: A scissor lift incorporating a trolley; lateral and oppositely lateral rollers; axles positioning the rollers at lateral and oppositely lateral sides of the trolley; torque cancelling “C” brackets mounted upon the trolley's lateral and oppositely lateral sides; a jack screw actuator connected operatively to the trolley for alternatively longitudinally and oppositely longitudinally moving the trolley; lateral and oppositely lateral roller tracks having longitudinal edges, each of the tracks supporting one of the rollers and each of the “C” brackets engaging one of the longitudinal edges; a scissor arm matrix having a lower longitudinal end connected to the trolley; a platform attached to the scissor arms' upper end; and a motor connected operatively to a chassis for longitudinally moving the jack screw actuator and for vertically moving the platform.

Abstract: An assembly for controlling a vertically extending member includes a device (22) having a stop member (34) and a speed control member (36) for controlling movement of the vertically extending member such as an elevator load bearing member (32) during a roping procedure. In a disclosed example, the stop member (34) is biased into a stop position where the vertically extending member (32) is locked between a brake pad (60) and a guiding member (54) so that the vertically extending member (32) cannot move relative to the device (22). An example input member for moving the stop member (34) out of the stop position comprises a foot pedal (70) that can be manipulated to control a position of the stop member (34). Absent manual manipulation of the input member, the stop member (34) prevents movement of the vertically extending member (32).

Abstract: A kitchen cabinet installation device to install upper wall cabinets and suspended cabinets is provided. The kitchen cabinet installation device of the present invention is a lightweight box for easy transportation and to provide an easy and quick installation procedure with precision and make the installation procedure a one man job. The kitchen cabinet installation device includes a box having a base and a cap, and a double scissor jack installed into the box. The box features rails with rollers to provide a smooth movement of the jack. The jack includes a lead screw. By cabinet installation the object is placed on the cap and is lifted by turning the knob in lead screw and held during the installation in a secure position.

Abstract: A cabin unit mounted on a horizontal platform includes a mechanism for locking the cabin unit when in a raised position above the horizontal platform. The locking mechanism includes an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint and a cylinder attached between the horizontal support and the articulated member. A cylinder arm is retracted to move the joint of the articulated member to a locked position while the cabin is in a raised position.

Abstract: A highly-compactable camera crane enables a load platform to be kept level as the boom is raised and lowered. A main boom is comprised of a number of crossed links which pivot at their crossings to allow extension and retraction of the boom and an auxiliary boom of similar crossed link construction couples the load platform to a reference pivot point of the main boom, enabling the load platform to be kept level as the booms are moved up and down relative to the pivot point.

Abstract: A seating system according to an exemplary aspect of the present disclosure includes, among other things, a plurality of seating risers configured to telescope relative to one another. Further, at least one of the plurality of seating risers is a powered seating riser configured to deploy and retract the plurality of seating risers. The powered seating riser includes a belt drive system. Additionally, the plurality of seating risers are adjustable between a lowered position and a raised position.

Abstract: A system useful for dressing out or performing maintenance or other work on a structure in a vertical position includes an elevator system emplaced around the perimeter of the structure, the elevator system including at least three elevators, each having an elevator mast and an elevator cab, the elevator masts interconnected such that the elevator system is freestanding; a control station for controlling and maintaining the elevation of the elevator cabs; a scaffolding/platform system attached to the elevator cabs and providing a work surface that may travel to an elevation proximate an upper portion of the structure, the elevation of work surface controllable using the control station and determined by the elevation of the elevator cabs; the elevator cabs being positionable at various elevations to allow for work to be performed on the structure. The systems may be used for construction, modification, and repair of various vertical structures.

Abstract: A portable processing plant for processing granular material is provided. The portable plant includes a plurality of portable processing modules configured to be stacked vertically to allow for a vertically downward progression of the generally granular material through the portable processing plant. Each portable processing module includes a self-supporting independent frame structure and has at least one processing component affixed to the self-supporting independent frame structure. The self-supporting independent frame structures of the plurality of portable processing modules combine to define a structural skeleton of the portable processing plant. Each self-supporting independent frame structure can be removed from the structural skeleton substantially fully assembled while the at least one processing component carried by the self-supporting. Methods of assembling and disassembling the portable processing plant are also provided.

Abstract: A ladder lift is provided. The ladder lift may include a foldable platform, a frame, a motorized gear mechanism, a gear channel and a toggle switch. The gear channel may extend upwardly from a supporting surface along the length of the frame. The gear channel may house a belt track extending along the length of the gear channel. The foldable platform may be rigidly connected to the motorized gear mechanism. The motorized gear mechanism may selectively engage the belt track for causing the foldable platform to move in a specified direction along the length of the gear channel. The toggle switch may be used to engage and disengage the motorized gear mechanism. The frame may support the gear channel, the foldable platform, the motorized gear mechanism and a user. The user may be accommodated on the foldable platform. Then the user may activate the toggle switch so that the foldable platform moves in a specified direction along the length of the gear channel for a predetermined distance.

Abstract: A collapsible structure is described that can be erected to provide an elevated working platform having two ends and two sides. Two telescopically collapsible ladder frames (10, 12) are disposed above the level of the platform, one on each end of the platform. Each ladder frame (10, 12) is formed of two stiles (20, 22) having telescopically collapsible sections, rungs each extending between respective sections of the two stiles and latch mechanisms for locking the stile sections in the extended position of the ladder frame. Each of the ladder frames (10, 12) further incorporates a guardrail (30, 32) that lies parallel to the rungs (24) when the ladder frame is collapsed. The guardrail (30, 32) is mounted for rotation about a first stile and releasably secured to the second stile. After release from the second stile of the same ladder frame and rotation about the first stile each guardrail is connectable to the second stile of the other ladder frame to lie parallel to a side of the platform.

Abstract: An apparatus comprising a pair of telescoping arms pivotally coupled between a base and a platform. Each arm comprises a base portion pivotally coupled to the base to pivot about a base pivot axis, an extension portion slidably coupled to the base portion and pivotally coupled to the platform to pivot about a platform pivot axis, and, a pivot support assembly attached along a side of one arm of the pair facing toward the other arm of the pair. The pivot support assembly is configured to allow longitudinal travel of a pivot anchor with respect to the base portion. The pivot assembly is coupled between the pivot anchors. The drive assembly is connected to controllably move the extension portions inwardly and outwardly with respect to the corresponding base portions, and controllably move the pivot anchors toward and away from the corresponding base pivot axes.

Abstract: A portable modular lift system that may be easily transported to a lifting location and compactly stored when not in use. The portable modular lift system generally includes a support base having a plurality of base wheels, a plurality of mast sections connectable to one another to form a vertical mast, a support platform movably positioned upon the vertical mast, and a drive unit connected to the support platform to elevate and lower the support platform upon the mast sections. The mast sections include a plurality of receiver apertures within a first end and a plurality of locking pins extending from a second end that are catchably received within the corresponding receiver apertures.

Abstract: A system useful for dressing out or performing maintenance or other work on a structure in a vertical position includes an elevator system emplaced around the perimeter of the structure, the elevator system including at least three elevators, each having an elevator mast and an elevator cab, the elevator masts interconnected such that the elevator system is freestanding; a control station for controlling and maintaining the elevation of the elevator cabs; a scaffolding/platform system attached to the elevator cabs and providing a work surface that may travel to an elevation proximate an upper portion of the structure, the elevation of work surface controllable using the control station and determined by the elevation of the elevator cabs; the elevator cabs being positionable at various elevations to allow for work to be performed on the structure. The systems may be used for construction, modification, and repair of various vertical structures.

Abstract: A lift safety system that prevents the lifting of a support platform from a support base until all of the support legs for the support base are supporting a minimum amount of weight to ensure stability of the lift. The support base includes a plurality of legs that extend outwardly with each of the legs having an adjustment member with a pad that engages a ground surface. As the adjustment member is adjusted downwardly with respect to the leg, a first engaging member connected to the adjustment member is elevated upwardly to engage a second engaging member thereby releasing a corresponding finger member attached to the support platform from the support base. Once all of the legs are supporting a minimum amount of weight, all of the finger members are released from the support base thereby allowing elevation of the support platform.