An assembly for accomplishing package transfer to and from a drone. The assembly includes a base supporting at least one extendable member. A package receiving platform is secured atop the member and a control system interfaces the assembly with the drone for issuing a set of command instructions for guiding and positioning the drone relative to the platform and for accomplishing package transfer between the drone and the platform. The command instructions include at least an instruction to elevate the platform at any point prior to package exchange and a subsequent instruction to retract the platform at any point following package exchange. Additional command instructions provide for managing each of pre-exchange and post-exchange of the package, such as for providing secure retention and post-exchange access by the recipient in the instance of a drone delivered and securely retained package.

A forming system includes a frame and two forming walls. The two forming walls are positioned at a distance from each other to define a first vertical wall course. One forming wall is supported by the frame such that the one forming wall can be translated toward or away from the respective other forming wall. The frame can be raised to raise the two forming walls to be positioned to pour a second vertical course on top of the first vertical course. The translation of the one forming wall allows for the pouring of the first vertical course with horizontally extending rebar that extends through the one forming wall outside of the first vertical wall course, to tie in to a subsequently poured floor slab. The translation permits the vertical raising of the one forming wall, without striking the extending rebar, to pour the second vertical course on the first vertical course. A worker's platform is provided that is supported by the frame and vertically movable by raising the frame. The worker's platform is located below the one forming wall on a side of the one forming wall opposite the respective other forming wall and is rollable or pivotal to also clear the extending rebar during raising of the frame.

A telescopic column includes at least two telescopic elements movable with respect to one another between two end positions and at least one damper that is configured such that, prior to reaching at least one of the end positions, a force slowing the relative movement of the telescopic elements is exerted on at least one of the telescopic elements.

Pumping machine (650, 750) comprising: at least two tubular elements (651, 751) containing pressurized gas and extending vertically in parallel and interconnected between them by means of a connecting element (652, 752); and an electromechanical lifting system (600, 700) comprising a first cylinder (601, 701), interconnected to the tubular elements (651, 751) and comprising a substance compressible by a piston (601b, 701b); and a screw (602, 702) with a vertical axis Y coinciding with the axis of the pumping machine (650, 750). The screw (602, 702) is inserted inside a second thrust cylinder (658, 758), connected in sliding manner inside the first cylinder (601, 701), and has a first end (602b, 702b) fixed to the connecting element (652, 752) and a second end (602a, 702a) configured for sliding inside the thrust cylinder (658, 758) and overlying a chamber (605, 705) comprising lubrication and cooling oil overlying the piston (601b, 701b).

Pumping machine (650, 750) comprising: at least two tubular elements (651, 751) containing pressurized gas and extending vertically in parallel and interconnected between them by means of a connecting element (652, 752); and an electromechanical lifting system (600, 700) comprising a first cylinder (601, 701), interconnected to the tubular elements (651, 751) and comprising a substance compressible by a piston (601b, 701b); and a screw (602, 702) with a vertical axis Y coinciding with the axis of the pumping machine (650, 750). The screw (602, 702) is inserted inside a second thrust cylinder (658, 758), connected in sliding manner inside the first cylinder (601, 701), and has a first end (602b, 702b) fixed to the connecting element (652, 752) and a second end (602a, 702a) configured for sliding inside the thrust cylinder (658, 758) and overlying a chamber (605, 705) comprising lubrication and cooling oil overlying the piston (601b, 701b).

A hydraulic lifting column for medical devices includes a hydraulic cylinder unit, a base element, a carrier element, at least one intermediate element and at least one first engaging member arranged on the carrier element and formed separately from the carrier element. The hydraulic cylinder unit is configured to move the lifting column along a travel axis between a retracted position and an extended position. The at least one intermediate element is disposed between the base element and the carrier element at least in the retracted position. The carrier element and the at least one intermediate element can be moved relative to the base element along the travel axis by the hydraulic cylinder unit acting on the carrier element. The first engaging member abuts against the intermediate element when the lifting column is moved between the retracted position and the extended position and drives the at least one intermediate element.

A hydraulic lifting column for medical devices includes a hydraulic cylinder unit, a base element, a carrier element, at least one intermediate element and at least one first engaging member arranged on the carrier element and formed separately from the carrier element. The hydraulic cylinder unit is configured to move the lifting column along a travel axis between a retracted position and an extended position. The at least one intermediate element is disposed between the base element and the carrier element at least in the retracted position. The carrier element and the at least one intermediate element can be moved relative to the base element along the travel axis by the hydraulic cylinder unit acting on the carrier element. The first engaging member abuts against the intermediate element when the lifting column is moved between the retracted position and the extended position and drives the at least one intermediate element.

In order to secure a reached extension position of a piston rod (22, 22) of an in particular multi stage operating cylinder device (100) with at least one operating cylinder unit (50) not only through the operating pressure in the cylinder (1, 1) of the operating cylinder unit (50) but additionally mechanically, a mechanical safety through interlocking safety elements (4a, b) in the interior of the operating cylinder device (100) is provided which is activated exclusively by the operating pressure in the first pressure cavity and disengaged by a pressure in a second operating cavity.

A lightweight jack includes a pressure cylinder, where the pressure cylinder has a pressure cylinder passage and a pressure cylinder body, the pressure cylinder body being a block through which a cylinder body passage is formed. The pressure cylinder is mechanically coupled to the pressure cylinder. The lightweight jack further includes a hydraulic actuator, where the hydraulic actuator is coupled to the pressure cylinder body. The hydraulic actuator includes an inner hydraulic cylinder, the inner hydraulic cylinder mechanically coupled to an inner cylinder head, and an outer cylinder, the outer cylinder mechanically coupled to an outer cylinder head. The lightweight jack also includes an extending body, the extending body coupled to the hydraulic actuator. The extending body is a block through which an extending body passage is formed, wherein the pressure cylinder passage, the cylinder body passage, and the extending body passage are aligned to form a tension member channel. The lightweight jack also includes a strand grabber, the strand grabber mechanically coupled to the extending body. The pressure cylinder, outer cylinder, and strand grabber are made of aluminum, titanium, fiber reinforced plastic, polymers, or carbon fiber.

A lightweight jack includes a pressure cylinder, where the pressure cylinder has a pressure cylinder passage and a pressure cylinder body, the pressure cylinder body being a block through which a cylinder body passage is formed. The pressure cylinder is mechanically coupled to the pressure cylinder. The lightweight jack further includes a hydraulic actuator, where the hydraulic actuator is coupled to the pressure cylinder body. The hydraulic actuator includes an inner hydraulic cylinder, the inner hydraulic cylinder mechanically coupled to an inner cylinder head, and an outer cylinder, the outer cylinder mechanically coupled to an outer cylinder head. The lightweight jack also includes an extending body, the extending body coupled to the hydraulic actuator. The extending body is a block through which an extending body passage is formed, wherein the pressure cylinder passage, the cylinder body passage, and the extending body passage are aligned to form a tension member channel. The lightweight jack also includes a strand grabber, the strand grabber mechanically coupled to the extending body. The pressure cylinder, outer cylinder, and strand grabber are made of aluminum, titanium, fiber reinforced plastic, polymers, or carbon fiber.