A lift device includes a guardrail assembly pivotally coupled to a mast assembly and having a guardrail and a door pivotally coupled to a free end of the guardrail by an automatic door hinge assembly. The automatic door hinge assembly includes a hinge rod rotationally fixed relative to the guardrail and including a plurality of helical protrusions, a hinge channel extending through the door and including a plurality of helical recesses, and a hinge rod spring biased between the guardrail and the door and configured to generate a biasing force on the door that biases the door toward a closed position. Each of the plurality of helical protrusions is received within a corresponding one of the plurality of helical recesses.

A lift assembly includes a base, a platform moveable relative to the base between raised and lowered positions, and a scissor mechanism to move the platform relative to the base. The lift assembly also includes a lift mechanism including a base support coupled to the base and extending from the base toward the platform, a platform support mounted to the platform and extending from the platform toward the base, a first linkage supported by the base support and coupled to the platform support, and a first pulley supported by the first linkage. The lift assembly also includes a drive mechanism supported by the base and a cable extending from the drive mechanism, wrapped at least partially around the first pulley, and fixed relative to the platform support. The cable is configured to be tensioned by the drive mechanism such that the lift mechanism moves the platform to the raised position.

A trailer tongue jack is convertible between operation by an integral actuator and an external actuator. The jack includes a clutch mechanism or coupler operable to selectively engage a drive screw with the integral actuator or the external actuator.

A trailer tongue jack is convertible between operation by an integral actuator and an external actuator. The jack includes a clutch mechanism or coupler operable to selectively engage a drive screw with the integral actuator or the external actuator.

The current invention is a remote-controlled vehicle jack that attach to the axle or other jack attachment points. A motor is located at the top of the jack. The motor is operated remotely. A cylinder housing is positioned vertically having brackets that are attached to the cylinder housing. The bracket consists of two horizontal steel bars with a bolt that connects them when secure. With the top bar open, the bracket is placed around the axle. The bracket is secured by driving the screw through both bars. with the piston rod pushing downward. A baseplate is secured at the bottom end of the piston rod and will be the point of contact with the ground.

The current invention is a remote-controlled vehicle jack that attach to the axle or other jack attachment points. A motor is located at the top of the jack. The motor is operated remotely. A cylinder housing is positioned vertically having brackets that are attached to the cylinder housing. The bracket consists of two horizontal steel bars with a bolt that connects them when secure. With the top bar open, the bracket is placed around the axle. The bracket is secured by driving the screw through both bars. with the piston rod pushing downward. A baseplate is secured at the bottom end of the piston rod and will be the point of contact with the ground.

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 vehicle lift assembly having an input shaft, a first ball screw coupled to rotate with the input shaft, a ball screw nut coupled to a first bracket and configured to selectively move a lifting member based on rotation of the first ball screw, and a power unit coupled to the input shaft, the power unit having a wireless transponder and configured to be selectively powered based on wireless signals received by the transponder from a remote device.

A portable tool mounting device has a frame, a tool mount member slidably mounted to the frame, and a motor connected to the frame and a threadable rod that extends through a bore in the tool mount member. Attached to the threadable rod is a nut that is positioned to engage the tool mount member.