Abstract: A belly dump trailer has a hopper having a bottom gate and a mobile support frame. The belly dump trailer is supported by wheels which may be in a dual axle configuration. The bottom gate is rotated between an open and closed position to discharge a load of materials within the hopper. The bottom gate is driven by a rotary drive connected to the bottom gate by an over center cam lock formed of pivotally connected link arms. The opening and closing of the bottom gate is driven by a pair of pneumatic linear actuators. The bottom gate may be positioned in between the two axles of the dual axle configuration.

Abstract: A belly dump trailer has a hopper having a bottom gate and a mobile support frame. The belly dump trailer is supported by wheels which may be in a dual axle configuration. The bottom gate is rotated between an open and closed position to discharge a load of materials within the hopper. The bottom gate is driven by a rotary drive connected to the bottom gate by an over center cam lock formed of pivotally connected link arms. The opening and closing of the bottom gate is driven by a pair of pneumatic linear actuators. The bottom gate may be positioned in between the two axles of the dual axle configuration.

Abstract: A portable, low-energy light tower to provide high, bright light having ground-engaging elements, a telescoping mast secured to the base and the mast having a pivot, the telescoping mast being rotatable about the pivot between a transport position and an operating position, and LED lighting elements at the top end of the telescoping mast. An electrically operated linear actuator mounted on the telescoping mast extends and retracts the telescoping mast through a system of cables and pulleys.

Abstract: An elevated platform for rapid evacuation has a cage having a floor and a railing, one or more suspension points secured to an upper portion of the cage above the floor and an eyelet secured to the cage for receiving a descender, the eyelet being positioned in relation to the cage such that a line drawn downward from the eyelet does not intersect the cage.