Stair-climbing conveyance

Details Stair-climbing conveyance Stair-climbing conveyance

1983-08-30

1986-01-28

Pekar, John A.

Motor vehicles

Special driving device

Portable track

180 93, 180907, 280DIG10, B62D 5504

Patent

active

045665516

ABSTRACT:
An improved power driven conveyance intended primarily for use by handicapped persons or invalids. A power means to drive the conveyance on level surfaces at normal pedestrian speeds and or to ascend or descend conventional or irregular stairways at reduced speed and increased torque. The invention further contains a self-leveling chair which automatically maintains the occupant in a level seated position regardless of the inclined position assumed by the conveyance frame, thereby contributing to the stability of the conveyance and the safety of the occupant. A fail safe tractor belt means is provided to insure a positive grip between the stair treads and the conveyance. Frontal and rear auxiliary tractor belt units adjust the inclination of the main tractor belts to alignment with the angularity of the stairways and landings.

REFERENCES:
patent: 3231290 (1966-01-01), Weyer
patent: 3288234 (1966-11-01), Feliz
patent: 3292722 (1966-12-01), Bamberg
patent: 3346062 (1967-10-01), Richison
patent: 4222449 (1980-09-01), Feliz

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