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 fire fighting device comprises a fire fighting aggregate (3) for penetrating a wall (5) and injecting fire fighting fluid into a space behind the wall. The fire fighting aggregate (3) comprises: a fluid driven rotating motor, such as a turbine, with a rotor (303) carrying a rotating cutting element (305), and a fluid inlet (109) for receiving fire fighting fluid to drive the rotor (303); a support (1) for attachment to the wall (5) suspending the fire fighting aggregate (3), at least the rotating cutting element (305) being movable relative to the support (1) towards the wall (5); a power means (322, 340) for pressing the rotating cutting element (305) towards the wall (5); and a second conduit for feeding the fire fighting fluid to the power means (322, 340) to provide for said power means (322, 340) to press the rotating cutting element (305) towards the wall (5).

A platform assembly includes a work platform including a platform floor and a safety rail extending from the platform floor to a rail height, and a primary sensor unit secured to the work platform and positioned adjacent one of the platform floor and the safety rail. The primary sensor unit is configured to monitor an area from the platform floor or from the safety rail to a space above the rail height and forward and aft of the work platform. The platform assembly enhances protection for an operator from sustained involuntary operation resulting in an impact with an obstruction or structure.

A lift device includes a lift assembly, a platform, and a controller. The lift assembly is configured to be driven to increase or decrease in length by extension and retraction of one or more actuators. The platform is coupled at an upper end of the lift assembly. The controller is configured to receive a value of a pitch angle and a roll angle of the lift device from an orientation sensor. The controller is further configured to determine a maximum allowable elevation of the platform based on at least one of the value of the roll angle and the value of the pitch angle of the lift device. The controller is further configured to limit operation of the lift assembly based on the maximum allowable elevation of the platform.

A lift device includes a base, a platform, and a scissor assembly coupling the base to the platform. The scissor assembly includes a first scissor layer, a second scissor layer, and a third scissor layer each including an inner arm pivotally coupled to an outer arm. The first scissor layer has a first middle axis offset vertically from a first end axis center point. A kicker assembly couples an actuator configured to raise and lower the platform to the second scissor layer and the third scissor layer. The kicker assembly includes a kicker with opposing first and second kicker ends. The kicker is pivotally coupled to the second scissor layer and releasably coupled to the third scissor layer. The actuator rotates the kicker relative to the second scissor layer. A guide is coupled to the kicker and configured to limit the rotation of the kicker.

A mobile elevating apparatus may include a mobile base having a front and a rear with a longitudinal axis being defined between the front and rear, with the mobile base comprising a frame and a wheel assembly mounted on the frame to support the frame in a manner permitting mobility. The apparatus may also include a lift assembly including at least one tier and being mounted on the frame and being extendable and retractable with respect to the frame to raise and lower a top of the lift assembly, an object mounted on the top of the lift assembly such that extension and retraction of the lift assembly raises and lowers the object, a power source positioned on the mobile base; and a control assembly mounted on the mobile base. In embodiments, the object may comprise a display sign.

A self-propelled aerial work platform apparatus includes a chassis and elevating work platform with operator controls thereon. The work platform includes a main deck, an extension deck and a storable work step at one end of the extension deck to allow a worker to access utilities through openings in drop ceilings. The step and attached legs are moveable together from a horizontal work position of the step to a vertically extending storage position with step and legs alongside the step close to guardrails at the end of the extension deck.

A lift device includes a chassis, a platform disposed above the chassis, a lift assembly coupling the platform to the chassis and configured to move the platform between a lowered position and a raised position, and a stair assembly coupled to at least one of the platform and the chassis, the stair assembly including a first step and a second step. The platform includes a deck defining a top surface configured to support an operator. The stair assembly is selectively repositionable relative to the chassis between a stored position and a deployed position. The stair assembly facilitates access to the deck from the ground when in the deployed position.

A vehicle and a hydraulic propulsion system for the vehicle are provided with first and second motors diagonally arranged relative to one another on the vehicle, and third and fourth motors diagonally arranged relative to one another on the vehicle. First, second and third flow divider combiner assemblies are provided and are arranged in a closed fluid loop with the motors. A first port of each of the assemblies are fluidly connected to one another. The first assembly has a second port fluidly coupled to the first and second motors, and a third port fluidly coupled to the third and fourth motors. The second assembly has second and third ports fluidly coupled to the first and third motors, respectively. The third assembly has second and third ports fluidly coupled to the second and fourth motors, respectively. A method of controlling the hydraulic system is also provided.

A supporting and levelling group for aerial work platforms includes a support base for supporting a containing cage of an aerial work platform and a support frame hinged to the support base so as to be able to oscillate with respect to an oscillation axis. The supporting and levelling group also includes at least a pair of ground rest elements hinged independently to the support frame, with respect to respective articulation axes parallel to one another and substantially perpendicular to the oscillation axis, such as to be able to independently vary a height thereof with respect to the support base.