A lift device according to the disclosure may include a base, and a link arrangement including first and second links that are connected to the base at first and second fixed coupling locations, respectively. The lift device may further include a lifting mechanism coupled to the first and second links, wherein the lifting mechanism is movable between a stowed position and a deployed position. Furthermore, the first and second links are configured to pivot in opposite directions with respect to each other when the lifting mechanism moves between the stowed position and the deployed position.

A lift device includes a base, a platform that is repositionable relative to the base between a fully raised position and a fully lowered position, a scissor assembly coupling the base to the platform, and a booster. The scissor assembly includes a scissor layer including a first scissor arm pivotally coupled to a second scissor arm, a pulley coupled to the scissor layer, a tensile member wrapped around the pulley, and an actuator configured to vary a working length of the tensile member such that the first scissor arm rotates relative to the second scissor arm to move the platform relative to the base. A booster is positioned to engage a portion of the tensile member and apply an upward force on the scissor assembly when the platform is in the fully lowered position.

A scissor lift includes a base, a platform configured to support a load, a lift assembly having a first end coupled to the base and a second end coupled to the platform, and a linear actuator coupled to the lift assembly and configured to extend to raise the platform relative to the base. The lift assembly includes a series of support members that are pivotally coupled to one another. The linear actuator includes a screw, a nut engaging the screw, and an electric motor configured to drive rotation of the screw relative to the nut to control extension of the linear actuator.

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. The scissors lift vehicle also includes a base coupled to the carriage between the wheels spaced apart in the right/left direction within a profile of the wheels and a scissors stack assembly including a plurality of scissors linkages extendable from a retracted position, where the scissors linkages are approximately horizontally configured to an extended position, where the scissors linkages are approximately orthogonally configured with respect to each other, the scissors stack assembly pivotally coupled to the base through a first pair of scissors linkages, the scissors stack assembly slidably coupled to the base through a second pair of scissors linkages.

A trailer lift that that rises to high levels that may tilt for loading and unloading. The trailer lift includes a lift-and-tilt mechanism, a trailer base, and a trailer platform. The lift-and-tilt mechanism includes a lower-strut link, an upper-strut link, a support member, a lower lift cylinder, and an upper cylinder. The lower-strut link and the upper-strut link are pivotably and terminally attached to each other. The support member is positioned offset to the lower-strut link and is pivotably attached to the upper-strut link to guide the upper-strut link. The trailer platform is terminally and pivotably connected to the upper-strut link. Similarly, the trailer base is pivotably and terminally connected to the lower-strut link and the support member. The upper lift cylinder is pivotably mounted in between the upper-strut link and the trailer platform. The lower lift cylinder is pivotably mounted between the upper-strut link and the lower-strut link.

A vehicle for tending to an elevated agriculture includes a base, a lower platform positioned above the base, and an adjustable support frame extending vertically upward from the lower platform. The adjustable support frame includes an expandable scissor portion. The vehicle also includes an elevated platform connected to the adjustable support frame such that the elevated platform is positioned above the lower platform, the elevated platform configured to selectively, vertically raise upward relative to the base from a lower height toward a higher height via selective expansion of the expandable scissor portion. The vehicle also includes a guide rail extending vertically upward from the elevated platform and horizontally surrounding at least a portion of the elevated platform. The vehicle further includes a drive unit operatively attached to the base and configured to selectively direct horizontal movement of the base with the elevated platform thereon.

This piece of machinery (1) comprises a system for lifting people or loads (5) and a first stand-alone electrical power source that is used to make the piece of machinery function. A second location (8) allows an optional second stand-alone electrical power source (15) to be removably accommodated. The latter is selectable from a plurality of different second sources not exclusively made up of engine generators and not exclusively made up of devices for storing electrical power. It for example allows the first stand-alone electrical power source to be recharged or the piece of machinery to be powered together therewith. The piece of machinery comprises a system for identifying the second stand-alone electrical power source among the plurality of second sources accommodated in the second location (8). On-board electronics manage the delivery of electrical power to the piece of machinery by the second source depending on the second source identified.

A lift device includes a chassis, tractive elements, a platform, a lift assembly, a first set of proximity sensors, and a controller. The tractive elements are rotatably coupled to the chassis and support the chassis. The platform is disposed above the chassis and includes a deck for supporting an operator. The lift assembly couples the platform to the chassis and can selectably move the platform between a lowered position and a raised position. The first set of proximity sensors are coupled to the platform and detect a distance of an obstacle relative to the platform. The controller is operably coupled with an alert system and receives obstacle detection data from the first set of proximity sensors. The controller selects a subset of the first set of proximity sensors to analyze based on an active function of the lift device and determines whether the obstacle is within the minimum allowable distance.

Apparatus and methods for fulfilling orders by a picker utilizing multiple different levels of container-storage devices (tote-storage devices in some embodiments), all interconnected by at least one different type of conveyance device. The use of more than one level of tote-storage device is referred to as multi-level tote storage. The storage is utilized to hold containers and to sequence the containers in a preferred order that enhances the pick rate/performance. The performance and location of the container storage on the conveyance device(s) relative to the picker is determined by the required pick rate/performance of the system. The conveyance devices recirculate the containers between different levels of container storage at specific times based on a multi-level tote storage simulation control algorithm that provides the optimum pick rate/performance until such time the picker completes all the pick requests assigned to the picker.

A scissor lift includes a base, a platform configured to support a load, a lift assembly having a first end coupled to the base and a second end coupled to the platform, and a linear actuator coupled to the lift assembly and defining a first actuator end and a second actuator end. The linear actuator includes a push tube, an electric motor configured to control extension of the push tube, a gearbox coupled to the electric motor, and a housing coupled to the gearbox.