The present invention relates broadly to a railway track trolley (10) generally comprising a collapsible chassis (12), two pairs of wheels (14a/b) and (16a/b), and a platform assembly (18). The collapsible chassis (12) includes a pair of opposing beams member (20a) and (20b) interconnected by a pair of adjustable cross-members (22) and (24). The pair of wheels (14a) and (16a) are removably mounted to opposing ends of one of the beam members (20a) whereas the other pair of wheels (14b) and (16b) are removably mounted to opposing ends of the other of the beam members (20b). The railway tracks (26a) and (26b) may be separated at one of a plurality of predetermined track gauges and the collapsible chassis in an expanded condition is designed to match the required lateral separation of the opposing rail members (26a/b). The invention is also directed broadly to a gate catch assembly (90) generally comprising a coupling sub-assembly (92), and a catch sub-assembly (96) configured to be releasably engaged by the coupling sub-assembly (92). The gate catch assembly (90) may be installed in conjunction with the platform assembly (18) of the railway track trolley (10) of the earlier aspect of the invention.

A proximity sensor assembly according to the disclosure includes a detection member, a switch, and a movable mounting arrangement associated with the detection member and the switch. The movable mounting arrangement includes a biasing characteristic for urging the detection member toward a home position after the detection member has been displaced from the home position, and a dampening characteristic to dampen movement of the detection member. Furthermore, the switch is actuatable when the detection member is displaced from the home position.

A leak containment system includes a mounting bracket, a tray, and a locking mechanism. The mounting bracket has a first rail, a second rail, and a panel extending between the first rails and the second rail. The panel is vertically offset from feet formed on the first rail, and a channel is defined by at least the first rail and an underside of the panel. The tray is removably received within the channel. The tray includes a bottom surface surrounded by perimeter walls that together define a fluid container. The perimeter walls include a front perimeter wall that extends upwardly above the other walls. The locking mechanism is coupled to the mounting bracket and is configured to selectively engage the front perimeter wall of the tray to restrict movement of the tray outward from the channel.

Systems and methods for a redundant wireless safety system that provides a second level of safety protocol when a worker is exposed to a more dangerous work environment. In an embodiment, such a machine may be configured to perform a specific manufacturing function wherein the machine may include first and second transceivers for maintaining enabling signals for functionality of the machine. The system may further include a base station (e.g., remote control) configured to operate in conjunction with the machine that in turn includes third and fourth transceivers also configured to maintain enabling signals for machine functionality. Machine functionality may be interrupted by an interrupt switch disposed in the machine. That is, the interrupt switch may be configured to enable functionality of the machine if and only if the first transceiver maintains periodic communication with the third transceiver and if the second transceiver maintains periodic communication with the fourth transceiver.

At least one embodiment relates to a lift device including a chassis, a series of tractive elements coupled to the chassis, an implement, and a boom coupling the implement to the chassis. The boom includes (a) a first shell including a first sidewall and a first transition coupling a first set of flanges to the sidewall and (b) a second shell including a second sidewall and a second transition coupling a second set of flanges to the sidewall. The first shell abuts the second shell along the first set of flanges and the second set of flanges. The first transition and the second transition extend along a length of the boom. The first transition and the second transition at least partially define a channel. The first shell is coupled to the second shell by a weld positioned within the channel.

In a floating unit, a floating mechanism is provided with: a rolling portion that includes a holding portion fixed to one of a first member and a second member, a sphere held by the holding portion so as to be rotatable in all directions; and an opposing portion that is fixed to the other one of the first member and the second member, and has an abutment surface that abuts against the sphere. The abutment surface includes an inclined surface that is formed, over the entire region of the abutment surface in a circumferential direction around a reference position, so as to come close to a side, in the vertical direction, on which the sphere is arranged, while extending outward in the horizontal direction from the reference position.

A lift device comprises a base, a retractable lift mechanism, a work platform, a linear actuator, and a lift controller. 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 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 comprises a central screw rod, an electric motor configured to provide rotational actuation to the central screw rod, and a nut assembly configured to translate the rotational actuation of the central screw rod into linear motion. The lift controller is configured to receive a lift command from an operator, monitor at least one lift characteristic associated with the linear actuator, and selectively inhibit the lift command.

In a vehicle with aerial work platform, while not receiving an operation instruction to move down the work platform from the rise and fall operating device, when moving down of the work platform is detected based on the detecting result of the rise and fall position detecting device, the rise and fall control device controls the first switching valve to switch so that the bottom-side oil chamber is connected to the hydraulic pump and controls the second switching valve to switch to the first state so as to make oil pressure in the bottom-side oil chamber be kept by the second switching valve and the check valve. Then, the rise and fall hydraulic cylinder is stopped to be contracted.

Systems and apparatuses an adjustable platform rail assembly. The adjustable platform rail assembly includes a lower rail assembly and an upper rail assembly. The lower rail assembly extends away from a platform of a mobile elevated work platform. The upper rail assembly is coupled to the lower rail assembly and extends upwardly away from the lower rail assembly to define a passenger compartment therein. The upper rail assembly is coupled to the lower rail assembly and is movable between a first position where the upper rail assembly defines an upper perimeter defined by a first length and a second position where the upper rail assembly defines an upper perimeter defined by a second length that is shorter than the first length.

An elevating apparatus includes a platform plate that can be raised and lowered. Once the platform plate has risen, it is locked in place and capable of supporting a load. In some embodiments, the elevating apparatus incorporates four arms in a scissor configuration to support and stabilize the platform plate. In some embodiments, the elevating apparatus incorporates a gas cylinder assembly to apply an upward force on the platform plate so that it rises when released from the lowered position. In some embodiments, a cushioned surface is deployed on the platform plate and around the base so that when the elevating apparatus is in the compressed position, it resembles a cushioned mat.