Material or article handling – Self-loading or unloading vehicles – Loading or unloading by other carrier or mover means – and...
Patent
1992-12-07
1994-05-31
Huppert, Michael S.
Material or article handling
Self-loading or unloading vehicles
Loading or unloading by other carrier or mover means, and...
414545, 414921, 280166, 187 9R, B60R 302
Patent
active
053164326
ABSTRACT:
Steps are convertible into a platform of an elevator for wheelchairs such as installed in vehicles and buses, during which conversion a barrier is automatically raised from the bottom step to be at the outer edge of the platform. The barrier is operated by an extensible link under the bottom step, which link is connected between the barrier and a crank arm keyed to an oscillatible transverse shaft under the inner part of the bottom step. Two additional crank arms are keyed to the ends of this shaft and are connected to a frame for a step or riser to oscillate said shaft when the steps are extended and unfolded into their platform position. The extendible link extends the barrier into a ramp when the platform is in its lowest position for access by a wheelchair. Reciprocating motors such as hydraulic pistons extend, retract, fold and unfold the panels that form the steps and their intermediate risers. When the step panels are in the platform position, additional reciprocating motors raise and lower the platform as an elevator. Stabilizing chains and rack and pinion gears insure uniform motion of the sides of the elevator and of the extendible bottom step.
REFERENCES:
patent: Re33595 (1991-05-01), Sullivan et al.
patent: 3955827 (1976-05-01), Wonigar
patent: 4020920 (1977-05-01), Abbott
patent: 4022337 (1977-05-01), Eichenhofer et al.
patent: 4027807 (1977-06-01), Thorley
patent: 4058228 (1977-11-01), Hall
patent: 4081091 (1978-03-01), Thorley
patent: 4124130 (1978-11-01), Rohrs et al.
patent: 4164292 (1979-08-01), Karkau
patent: 4176999 (1979-12-01), Thorley
patent: 4180366 (1979-12-01), Roth et al.
patent: 4219104 (1980-08-01), MacLeod
patent: 4251179 (1981-02-01), Thorley
patent: 4270630 (1981-06-01), Karkau
patent: 4441850 (1984-04-01), Thorley
patent: 4466771 (1984-08-01), Thorley et al.
patent: 4556128 (1985-12-01), Thorley et al.
patent: 4984955 (1991-01-01), McCullough
patent: 5110252 (1992-05-01), Aoki
Clouse Ryan J.
Hall John C.
Risner P. Fred
Smalley Raymond L.
Strohm Edward L.
Huppert Michael S.
Keenan James
Kirk Hugh Adam
REB Manufacturing Co., Inc.
LandOfFree
Wheelchair lifts with automatic barrier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wheelchair lifts with automatic barrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wheelchair lifts with automatic barrier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1624668