Abstract: A foldable ramp for evacuation of a vehicle, the ramp including hingedly connected primary and secondary side members, a primary fixed panel fixedly attached the primary side members, a primary flipping panel extending between the primary side members adjacent the primary fixed panel and having a first end pivotally connected to the primary side members and a second end free from the side members, and a secondary flipping panel extending between the secondary side members and having a first end free from the side members and hingedly connected to the second end of the primary flipping panel and a second end pivotally connected to the secondary side members. The ramp is configurable between a folded and a deployed position, with the panels in the deployed position forming a ramp surface and the panels in the folded position being stacked one against the other.

Abstract: A foldable ramp for evacuation of a vehicle, the ramp including hingedly connected primary and secondary side members, a primary fixed panel fixedly attached the primary side members, a primary flipping panel extending between the primary side members adjacent the primary fixed panel and having a first end pivotally connected to the primary side members and a second end free from the side members, and a secondary flipping panel extending between the secondary side members and having a first end free from the side members and hingedly connected to the second end of the primary flipping panel and a second end pivotally connected to the secondary side members. The ramp is configurable between a folded and a deployed position, with the panels in the deployed position forming a ramp surface and the panels in the folded position being stacked one against the other.

Abstract: The driven pulley is used in a variable-speed belt drive. It includes a clutch for transferring torque from the belt to the main shaft of the driven pulley. The clutch is alternatively movable between a disengaged position where the belt can still be in movement without transferring torque, and an engaged position where the torque is transferred to the main shaft. The clutch is controlled by the winding diameter of the belt. A plurality of rods is also provided for keeping the flanges from rotating relative to each other and for transferring torque from the flanges to a movable plate at the back of the clutch. This driven pulley reduces the wear of the belt, decreases the response time and increases the maximum torque that can be transferred compared with the conventional driven pulleys.

Abstract: The driving pulley is used in a variable-speed belt drive, which includes, in particular, two radially converging ramps facing each other and coaxial to a shaft, one ramp being rigidly attached to a movable flange and the other ramp being rigidly attached to the shaft in spaced relationship with the movable flange. A plurality of sliding flyweights are symmetrically located around the shaft and radially movable between the ramps. The improvement in the driving pulley is that each ramp includes a contact surface on which the flyweights are in contact wherein at least one movable ramp contact surface is curved. Each flyweight also includes a lateral knob engaged with the curved contact surface for ensuring that the contact point of the sliding flyweights with a curved contact surface does not substantially change as the flyweights slide.