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1. CA2081027 - WHEELCHAIR LIFT FOR TRANSIT VEHICLES HAVING ELEVATED PASSENGER COMPARTMENT FLOOR

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters
What is claimed as new and desired to be secured by Letters Patent is:
1. A wheelchair lift, for use on a transit vehicle having at least one compartment under the passenger seating area, comprising support means to be secured to the compartment; a movable carriage mounted on said support means; means for moving said carriage into and out of the compartment, a platform mounted on said carriage; and means for lowering said platform to the ground and raising it to the level of the passenger seating area.
2. The wheelchair lift of Claim 1, wherein said platform has a fixed portion and a movable portion and means for moving said movable portion from a first position when the lift is stowed in the compartment and to a second position when the lift is deployed outwardly of the compartment.
3. The wheelchair lift of Claim 2 having handrails extending from opposite sides of said fixed and movable platforms and wherein, when the lift isdeployed outwardly of the compartment, said handrails extend upwardly from both of said platforms.
4. The wheelchair lift of Claim 3 having a forward barrier normally extending upwardly from said movable platform and means for rotating said forward barrier to a ground-engaging position when the lift is at ground level and/or rotating it back to its upward position when the lift is in motion or stowed.
5. The wheelchair lift of Claim 4 having a rearward barrier normally extending upward from said fixed platform and means for rotating said rearward barrier to a position engaging the floor of the bus passenger seating area when the lift has been raised to that level and for rotating it back to its upward position when the lift is in motion.
6. The wheelchair lift of Claim 1 wherein, said means for lowering and raising said platform comprises: forward vertically extending arms on opposite sides of said platform; rearward vertically extending arms on opposite sides of said carriage;
lifting links, each pivotally connected at one end to one of said forward arms, means rotatably connecting each one of said lifting links at their distal ends to one said rearward arms; and means for rotating said lifting links in either a clockwise or counterclockwise direction.
7. The wheelchair lift of Claim 6, wherein said means for rotating said lifting links comprises at least one crank arm secured thereto and extending therefrom, and actuating means connected between said at least one crank arm and said carriage to rotate said crank arm.
8. The wheelchair lift of Claim 7, including a shaft extending between said rearward arms connecting said lifting links to each other.
9. The wheelchair lift of Claim 7, including stabilizing links, each pivotally connected at one end to said forward arms and at their distal ends to said rearward arms.
10. The wheelchair lift of Claim 8, wherein said actuating means comprises at least one hydraulic actuator connected between said at least one crank arm and said carriage.
11. The wheelchair lift of Claim 1, wherein said support means comprises a pair of spaced-apart rails to be secured in the compartment and wherein said carriage comprises a rectangular frame movable on said rails.
12. The wheelchair lift of Claim 10, wherein said means for moving said carriage into and out of said compartment comprises a drive shaft rotatably mounted on said frame, motor means connected to said drive shaft for rotating itin either a forward or reverse direction, and at least one drive element connected to said drive shaft to cause movement of said carriage.
13. The wheelchair lift of Claim 11, including at least one toothed element extending along at least one of said guide rails and wherein said drive element engages said at least one toothed element to propel said carriage.