A fully-electric lift vehicle comprises a base, a battery, a scissor lift movable between an extended position and a retracted position, a work platform the scissor lift, a linear actuator including an electric motor powered by the battery, an electromagnetic brake coupled to the electric motor; and a manual release coupled to the electromagnetic brake so that, in the event of a power failure, actuation of the manual release enables the scissor lift to descend toward the retracted position. The electric motor is configured to act like a generator and reduce a descent speed of the scissor lift during the descend toward the retracted position.

A system is disclosed which provides the ability to install a cross arm on a power pole utilizing an electrically isolated bucket which is free of all hydraulic components used by an operator in the bucket to manipulate the bucket. The system also utilizes an in-the-bucket rechargeable battery powered electric tool such as a saw, drill etc. without a need for a hydraulic electric generator in the bucket. The system includes the ability to provide communication to and from and to supply electrical power to remote portions of an electrically isolated boom, by transmitting optical power and control signals through an electrically non-conductive optical fiber.

An apparatus for treating a surface of a structure includes a main carriage having an accessory carriage that is vertically movable with respect to the main carriage.

A lift device comprises a base, a retractable lift mechanism, a work platform, a linear actuator, and a descent control mechanism. The base has a plurality of wheels. The retractable lift mechanism has a first end coupled to the base and is moveable between an extended position and a retracted position. The work platform is configured to support a load. The work platform is coupled to and supported by a second end of the retractable lift mechanism. The linear actuator is configured to selectively move the retractable lift mechanism between the extended position and the retracted position. The linear actuator has an electric motor. The descent control mechanism is configured to reduce a speed at which the retractable lift mechanism is moved from the extended position to the retracted position.

A floating device for an aerial work platform, comprising a pressure oil source (100), a controller (200), a left floating device, and a right floating device, a chassis (700), and a swing axle (600). The left floating device comprises a left hydraulic cylinder (300), a left balance valve (310), and a left locking device; the right floating device comprises a right hydraulic cylinder (400), a right balance valve (410), and a right locking device; one end of the left hydraulic cylinder (300) and one end of the right hydraulic cylinder (400) are hinged on the chassis (700); the swing axle (600) is hinged with the chassis (700); the other end of the left hydraulic cylinder (300) and the other end of the right hydraulic cylinder (400) are hinged on two opposite ends of the swing axle (600); and the left locking device and the right locking device constitute second-level locking of the left hydraulic cylinder (300) and the right hydraulic cylinder (400), thereby ensuring that the aerial work platform will not tip over due to the sliding of the hydraulic cylinders.

A machine system includes a first wireless transceiver, a plurality of second wireless transceivers, and a processing circuit. The first wireless transceiver is configured to couple to a first portion of a machine. The plurality of second wireless transceivers are configured to couple to a second portion of the machine. The first portion is movable relative to the second portion. The processing circuit is configured to determine a position of the first portion based on time delays in communication between the first wireless transceiver and each of the plurality of second wireless transceivers.

A concave personnel basket for an aerial work platform such as a boom lift is disclosed. The personnel basket is configured with a middle portion, facing away from the boom lift, that is recessed several feet towards the boom lift. The basket also has two opposite ends, also facing away from the boom lift, that protrude several feet outward relative to the middle portion. As a result, the personnel basket can partially envelop convex target structures such as cell towers and building corners. Personnel standing in the basket can thus access multiple sides of the target without needing to command the boom lift to reposition the basket. This improves work efficiency and safety.

An aerial device data collection apparatus is described. The aerial data collection apparatus includes a power source, a data capture device, a wireless transmitter, and a housing. The data capture device is connected to the power source. The wireless transmitter is connected to the power source and is communicably coupled to the data capture device. The wireless transmitter is configured to transmit data captured by the data capture device. The power source and the wireless transmitter are contained within the housing. The housing is configured to couple to a surface of an aerial bucket.

A concave personnel basket for an aerial work platform such as a boom lift is disclosed. The personnel basket is configured with a middle portion, facing away from the boom lift, that is recessed several feet towards the boom lift. The basket also has two opposite ends, also facing away from the boom lift, that protrude several feet outward relative to the middle portion. As a result, the personnel basket can partially envelop convex target structures such as cell towers and building corners. Personnel standing in the basket can thus access multiple sides of the target without needing to command the boom lift to reposition the basket. This improves work efficiency and safety.

An electrical full bridge strain gauge circuit, load cell, and load detection device for use in lifting platforms such as forklifts, loaders, cranes, and trucks, wherein the detection of the weight of a given load is desirable. The circuit includes a full bridge strain gauge configuration having a pair of voltage supply terminals and a pair of signal terminals, first resistors connected in series between the supply terminals and having a first tap between two resistors, and second resistors connected in series between the signal terminals and having a second tap between two resistors. A comparer has input terminals connected to the first and the second taps, for comparing a first voltage potential at the first tap with a second voltage potential at the second tap, and for producing a corresponding drift signal.