An inverted telescoping mast configured to be mounted to a ceiling or other structure within a building for supporting a payload at a range of heights within the building. The mast can include cable management for routing of cables external the mast for supplying/exchanging power, control signals, data etc. to the payload. An internal spring retains the mast in the retracted position. A tension control system restricts extension and/or retraction of the mast when actuating cable tension is above or below respective tension thresholds.

Reduction of minimum turning radius of an aerial work platform. Drive motors are provided to driven wheels of the platform respectively, so that the driven wheels can be independently controlled in terms of rotational speed and rotation direction. When the steering angle of steered wheels is at most a first steering angle, constant velocity control is performed, driving both of the driven wheels in the same rotation direction and at the same rotational speed. When the steering angle exceeds the first steering angle and is at most a second steering angle, differential control is performed, reducing the rotational speed of the driven wheel on the inside in the turning direction relative to the driven wheel on the outside in the turning direction. When the steering angle exceeds the second steering angle, counter-rotation control is performed, counter-rotating the driven wheel that is on the inside in the turning direction.

A transportation apparatus includes a delivering device, an elevating unit and a loading device. The delivering device is horizontally movable. The elevating unit is disposed under and mounted to the delivering device, and is vertically extendable and contractible relative to the delivering device. The loading device is adapted for loading and unloading an object, and includes a moving unit and a fork unit. The moving unit includes a moving base horizontally movable along a lower first axis parallel to a first direction relative to the elevating unit. The fork unit includes two fork prongs being horizontally spaced apart from each other along a second direction which is transverse to the first direction.

A watercraft storage system for storing and concealing items on watercraft, which includes a suspendable shelf extending downwardly from and attaching to a select portion of the floorboard and connecting to a pair of end caps to form a containment enclosure for housing therewithin a scissor lift configured with an upper platform connecting to a base platform by a pair of moveable supports. A linear actuator connecting to the base platform and a lower forward shaft of the scissor lift operably sets in motion the moveable supports to lift and lower the upper platform relative to the base platform to respectively receive and store items temporarily below the floorboard so as to maintain continuity of the walkways associated with the watercraft.

A dynamic system for a lifting apparatus is disclosed. The dynamic system includes a first motor and a second motor decoupled from the first motor. During the ascent of the lifting apparatus, only the first motor is involved in the driving of the lifting apparatus. During the descent of the lifting apparatus, only the second motor is involved in charging the battery system. Since the first motor and the second motor are decoupled from each other, the first motor can have a high driving efficiency and the second motor can have a high power generation efficiency, the problem that when only one motor is adopted, the motor needs to balance between the driving efficiency and power generation efficiency is solved. The energy recovery rate of this invention can be increased from 10% in the prior art to about 30%.

A hoist attachment which includes a base member; a positioning guide extending from the base member; a positioning member; and an endless sling. The endless sling extends from the base member and cooperates with the positioning guide, the positioning member and the hook member. The hoist attachment remains in position when lifting a load but is easily adjustable when no load is applied. The hoist attachment may be used with the forks of a forklift truck.

The bucket truck canopy is a PVC framework with adjustable and removable vinyl windows. The structure is built to attach to the bucket of a bucket truck by means of four clamps. The length of the vinyl windows on the four sides is four to five inches longer than the PVC structure to hang past the lip of the attached bucket and further protect against the weather. All of the vinyl windows are translucent, giving visibility to the worker within the canopy, and are connected to the framework by velcro so the worker may remove them or adjust their positioning as desired. The pitched roof provides shelter from precipitation and is held in place by a locking mechanism. All elements of the bucket design and locking mechanism are non-flammable and non-conductive to protect the worker inside of the structure.

A multi-lift point elevator includes a lifting frame for elevating a plane. The lifting frame includes lift stanchions with telescoping tubes controlled by bias connectors extending into the telescoping tubes from leaf springs connected to the lifting frame. The leaf springs are activated by a connector extension, which urges the leaf springs away from the lift stanchions to release the bias connectors from the telescoping tubes to cause the telescoping tubes to extend or retract as a jack elevates or lowers the plane.

Method and apparatus for improved height adjustment of wall partitions. According to the present disclosure, an extendable Foot Controlled Elevator Device is placed beneath a wall partition. A user may then apply downward force on a Vertical Height Control to adjust the vertical position of the wall partition. In some embodiments, the Foot Controlled Elevator Device has a compressible base, allowing it to fit into tight areas (e.g., between toilets in a restroom under construction). In other embodiments, one or more Foot Controlled Elevator Devices may be linked, allowing for better control over the wall divider and simultaneous or distinct control of the respective Foot Controlled Elevator Devices.

The disclosure pertains to a method and structure of securing a fallen tree or broken utility pole that has remained partially upright and in an insecure position, thereby creating a hazard to persons or property. The disclosure teaches a stand or similar structure that secures the partially fallen tree or pole during removal operations. The stand is load bearing and may be supported by at least one angled stabilizing leg structure. The structure may rest on ground support plates. The support plates may be attached to the ground by spike or anchor mechanisms. The stand can be extendable utilizing hydraulic or manual levered jacks or an extendable piston-cylinder combination. The structure can be placed under the fallen tree or pole and extended vertically upward into contact with the tree trunk or pole. The structure may use lifting components comprising cylinder/piston combinations, telescoping pistons, scissor lift components or similar.