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 fi
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.
대표청구항▼
1. A foldable ramp for evacuation of a vehicle, the ramp comprising: a first pair of spaced apart primary side members each having a first end hingedly connectable to a frame attached to the vehicle and a second end opposed the first end;a second pair of spaced apart secondary side members, each of
1. A foldable ramp for evacuation of a vehicle, the ramp comprising: a first pair of spaced apart primary side members each having a first end hingedly connectable to a frame attached to the vehicle and a second end opposed the first end;a second pair of spaced apart secondary side members, each of the secondary side members having opposed first and second ends, the second end of each secondary side member being connected to the second end of a respective one of the primary side members;a primary flipping panel extending between the primary side members and having a first end pivotally connected to the primary side members and a second end displaceable relative to the side members;a secondary flipping panel extending between the secondary side members and having a first end pivotally connected to the secondary side members and a second end displaceable relative to the side members, the second end of the secondary flipping panel being hingedly connected to the second end of the primary flipping panel; anda fixed panel extending between the side members of one of the first and second pairs, the fixed panel being fixedly attached to the side members of the one of the first and second pairs adjacent the first ends thereof, the fixed panel being adjacent the first end of the flipping panel connected to the side members of the one of the first and second pairs;wherein the ramp is configurable between a folded and a deployed position, the panels in the deployed position forming a ramp surface for evacuation of the vehicle, and the panels in the folded position being stacked one against the other. 2. The ramp as defined in claim 1, further comprising two ramp linkages each including two hingedly interconnected sections, each ramp linkage extending from a respective one of the primary side members near the second end thereof for connection to the frame, and further comprising at least one arm pivotally connected to a respective side of the primary flipping panel such that upon deployment of the ramp, each arm is actuated by a respective one of the ramp linkages to force a deployment of the primary flipping panel. 3. The foldable ramp as defined in claim 2, wherein the at least one arm includes two arms, each linkage slidably extending through a sleeve pivotally connected to a respective one of the arms. 4. The foldable ramp as defined in claim 1, wherein the fixed panel is integral with the side members of the one of the first and second pairs. 5. The foldable ramp as defined in claim 1, wherein the fixed panel is a primary fixed panel and the one of the first and second pairs is the first pair, further comprising a secondary fixed panel extending between the secondary side members adjacent the first ends thereof and adjacent the first end of the secondary flipping panel, the secondary fixed panel being fixedly attached to the secondary side members. 6. The foldable ramp as defined in claim 1, wherein a hinged connection between the primary and secondary side members is aligned with a hinged connection between the primary and secondary flipping panels. 7. The foldable ramp as defined in claim 1, wherein the primary and secondary flipping panels are interconnected by at least one damper. 8. The foldable ramp as defined in claim 1, further comprising a lock engageable to lock a position of the primary and secondary flipping panels relative to one another, the lock being automatically engaged when the flipping panels become aligned with one another. 9. The foldable ramp as defined in claim 8, wherein the primary and secondary flipping panels are biased away from a position aligned with one another, so that a force must be applied to align the flipping panels to engage the lock. 10. The foldable ramp as defined in claim 3, further comprising a lock engageable to lock a position of the primary and secondary flipping panels relative to one another, the lock being automatically engaged when the flipping panels become aligned with one another, wherein the primary and secondary flipping panels are biased away from a position aligned with one another by a spring surrounding each linkage and compressed between the sleeve and an end of the linkage connected to the primary flipping panel, so that a force must be applied to align the flipping panels to engage the lock. 11. The foldable ramp as defined in claim 1, wherein the primary and secondary side members include stoppers extending therefrom against which the primary and secondary flipping panels abut when aligned with one another. 12. An evacuation device for a ground vehicle, the evacuation device comprising a ramp as defined in claim 1, the frame defining a door opening, a door connected to the frame through hinges such as to be pivotable between a closed position where the door blocks the door opening and an opened position where a free end of the door is pivoted away from the vehicle, the ramp in the folded position allowing the door to close thereover. 13. The device as defined in claim 12, further comprising flexible belts extending between the secondary side members and the frame to serve as handrails for users of the device. 14. The device as defined in claim 12, wherein the ramp is biased toward the deployed position when in the folded position, the device further comprising a drum rotationally mounted in a fixed position with respect to the frame and a rope extending between the ramp and the drum and wound therearound, a gear functionally linked to the drum such as to rotate simultaneously therewith, a ratchet mechanism biased in an engaged position in engagement with the gear and movable to a release position free of the gear, the ratchet mechanism in the engaged position allowing the gear to rotate in a first direction and preventing the gear from rotating in a second direction, the drum rotating to pull the ramp toward the folded position when the gear rotates in the first direction. 15. The device as defined in claim 14, further comprising a latch mechanism attached to the door, the latch mechanism engaging the ratchet mechanism and moving the ratchet mechanism toward the release position as the door opens. 16. The device as defined in claim 15, wherein the latch mechanism moves the ratchet mechanism to the release position only when the door reaches the opened position, such that the ramp is prevented from being deployed until the door reaches the opened position. 17. The device as defined in claim 12, wherein the door includes a locking mechanism locking the door with the frame and actuable to unlock the door from the frame, the door further including an inflatable seal extending therearound and sealing a space between the door and the frame when the door is in the closed position, the inflatable seal being connected to a source of pressurized air through a valve actuable to release air pressure in the inflatable seal, and wherein the valve is functionally connected to the locking mechanism such that actuation of the locking mechanism actuates the valve before actuating the latch.
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이 특허에 인용된 특허 (18)
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