Underfloor extendible ramp for vehicles
Patent 5393192 Issued on February 28, 1995. Estimated Expiration Date: 
October 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1639879 1699882 3511393 3870170 Vehicular transportation system Stowable step for vehicles Passenger vehicle access stair and elevator apparatus Van platform housing Lift for wheelchairs Ramp and ramp carrier for trucks and the like InventorsAssigneeApplicationNo. 136655 filed on 10/01/1993US Classes:414/537, Skidway14/69.5, GANGWAY, RAMP, OR DOCK LEVELER296/26.1, Having pivotal means296/58, Shovel, board type296/61, Combined loading chute414/921HANDICAPPED PERSON HANDLINGExaminersPrimary: Bucci, David A.Attorney, Agent or FirmInternational ClassB60P 001/00AbstractThe disclosure comprises a tray mountable under the floor of a vehicle, which tray contains an extendible ramp mechanism. This mechanism comprises a ramp and a driving panel for the ramp. The ramp is fulcrummed intermediate its ends on the outer ends of parallel arms extending from the driving panel. Also in the tray, as part of the driving mechanism, are a pair of parallel toothed belts driven by a reversible rotating motor, which belts are attached to the driving panel for extending and retracting the ramp from the tray. Mounted under the driving panel is a reciprocating motor connected by a crank arm to a shaft having additional crank arms pivotally connected to the underside of the ramp adjacent the driving panel. When the ramp is fully extended, the reciprocating motor tilts the ramp so that its inner end is moved upwardly to be flush with the floor of the vehicle. Simultaneously, the outer end of the ramp contacts the ground. The ramp has parallel side barriers which spring into position when the ramp is fully extended. These barriers are automatically folded against the top surface of the ramp by an angularly-mounted roller which contacts a cammed surface at the inner ends of each barrier as the ramp is retracted into the tray.Field of SearchSkidwayWith haulage means (e.g., cable, etc.) Laterally movable rigid platform type HANDICAPPED PERSON HANDLING Load-receiving portion also shiftable longitudinally Load-receiving portion includes means which extends longitudinally therefrom to form ramp when portion pivots Combined loading chute Attached GANGWAY, RAMP, OR DOCK LEVELER | |
