A scissor lift (100) for use in a stage assembly includes a base portion (110) configured to be supported on a floor or other support surface and a top portion (120) configured to support a platform. A scissor arm assembly (130) connects the base portion (110) and the top portion, and a rigid chain lifting system (150) comprising a rigid chain (151) connecting the base portion (110) and the top portion (120). Extension and retraction of the rigid chain (151) causes the top portion (120) to rise and fall with respect to the base portion (110). The use of a rigid chain lifting system (150) means that the scissors (130) are provided for guidance rather than applying load. The scissor lift (100) can be used in conjunction with one or more passive scissors (200), couplable to the scissor lift (100).

A modular platform is provided and includes a platform having upper and lower surfaces. The modular platform further includes one or more propulsion units, mesh coverings, jack elements and a lock mechanism. The one or more propulsion units are embedded within the platform to generate upward thrust. The mesh coverings overlay each of the one or more propulsion units in the upper surface. The jack elements are coupled to the lower surface and support the platform above an underlying substrate. The lock mechanism connects the platform to a neighboring platform. A power storage unit is embedded in the platform and powers the one or more propulsion units, the jack elements and the lock mechanism. A control unit is embedded in the platform and controls operations of the one or more propulsion units, the jack elements and the lock mechanism.

A modular platform is provided and includes a platform having upper and lower surfaces. The modular platform further includes one or more propulsion units, mesh coverings, jack elements and a lock mechanism. The one or more propulsion units are embedded within the platform to generate upward thrust. The mesh coverings overlay each of the one or more propulsion units in the upper surface. The jack elements are coupled to the lower surface and support the platform above an underlying substrate. The lock mechanism connects the platform to a neighboring platform. A power storage unit is embedded in the platform and powers the one or more propulsion units, the jack elements and the lock mechanism. A control unit is embedded in the platform and controls operations of the one or more propulsion units, the jack elements and the lock mechanism.

The present invention provides an exterior wall maintenance apparatus. In certain embodiments, the exterior wall maintenance apparatus comprises a suspension means; and a suspended platform, where the suspended platform is physically coupled with the suspension means and the suspension means moves the suspended platform vertically and horizontally in parallel to an exterior wall of high rise buildings.

An aerial work platform (AWP) includes a base, a retractable lifting mechanism, a platform, an actuator, and a spring. The retractable lifting mechanism has a first end rotatably coupled to the base. The platform is coupled to and supported by a second end of the retractable lifting mechanism. The actuator is pivotally coupled to the retractable lifting mechanism. The actuator has a piston received within a housing that is movable between a stowed position and a deployed position, where the piston engages and forces the retractable lifting mechanism away from the base to lift the platform away from the base. The spring biases the retractable lifting mechanism away from the base and provides a variable biasing force to the retractable lifting mechanism that increases as the piston approaches the stowed position.

An adjustable mechanic apparatus to facilitate elevated access to a vehicle, including a bottom frame portion to allow a user to stand thereupon, the bottom portion including a bottom central planar surface to be disposed near a front portion or a rear portion of the vehicle, the bottom central planar surface having a length that is longer than a width of the vehicle, and such that the bottom central planar surface is disposed substantially perpendicularly with respect to a length of the vehicle, a first bottom planar support surface disposed perpendicularly away from a first end of the bottom central planar surface with respect to a first lateral direction, a second bottom planar support surface disposed perpendicularly away from a second end of the bottom central planar surface with respect to the first lateral direction, and a plurality of adjustable legs removably connected to at least a portion of at least one of a bottom portion of the bottom central planar surface, a bottom portion of the first bottom planar support surface, and a bottom portion of the second bottom planar support frame to allow the bottom surface portion to be elevated above a ground surface, and a top frame portion to extend perpendicularly away from a top surface of the bottom frame portion in a second direction to create a wall-like structure that prevents the user from falling onto the vehicle.

An adjustable mechanic apparatus to facilitate elevated access to a vehicle, including a bottom frame portion to allow a user to stand thereupon, the bottom portion including a bottom central planar surface to be disposed near a front portion or a rear portion of the vehicle, the bottom central planar surface having a length that is longer than a width of the vehicle, and such that the bottom central planar surface is disposed substantially perpendicularly with respect to a length of the vehicle, a first bottom planar support surface disposed perpendicularly away from a first end of the bottom central planar surface with respect to a first lateral direction, a second bottom planar support surface disposed perpendicularly away from a second end of the bottom central planar surface with respect to the first lateral direction, and a plurality of adjustable legs removably connected to at least a portion of at least one of a bottom portion of the bottom central planar surface, a bottom portion of the first bottom planar support surface, and a bottom portion of the second bottom planar support frame to allow the bottom surface portion to be elevated above a ground surface, and a top frame portion to extend perpendicularly away from a top surface of the bottom frame portion in a second direction to create a wall-like structure that prevents the user from falling onto the vehicle.

A scaffolding arrangement for a building outer wall, comprising a plurality of anchor bolts arranged at a distance from each other at least in the horizontal direction, including tube clamps connected to the anchor bolts, a horizontally extended rail, the rail being fixed to the tube clamps, a scaffolding as well as a connecting device for fixing the scaffolding to the rail. The connecting device provides a first coupling encompassing the rail as well as a second coupling encompassing a tube element of the scaffolding and a coupling connector for connecting the first coupling to the second coupling.

A lift device includes a base, a platform configured to support an operator, and a scissor assembly coupling the base to the platform. The scissor assembly includes a first scissor layer including a first inner arm pivotally coupled to a first outer arm. The first inner arm is configured rotate relative to the first outer arm about a first middle axis. The first scissor layer has a first end axis center point. An actuator is configured to move the platform between a fully raised position and a fully lowered position relative to the base. The first middle axis is offset vertically from the first end axis center point.

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, and a scissor assembly coupling the base to the platform. The scissor assembly includes a scissor layer including a first scissor arm pivotally coupled to a second scissor arm. The first scissor arm is configured to rotate relative to the second scissor arm about a middle axis that extends laterally. A pulley is coupled to the first scissor arm. A tensile member is wrapped around the pulley and coupled to the second scissor arm. An actuator is 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.