Land vehicles – Step or abutment ascending type vehicle – With endless track
Patent
1981-11-09
1984-09-25
Pekar, John A.
Land vehicles
Step or abutment ascending type vehicle
With endless track
280650, 280DIG10, 297 31, 297DIG4, 474140, B62B 502
Patent
active
044732341
ABSTRACT:
A carriage for descending stairs carrying a person under the control of an operator, i.e., an able-bodied person walking behind the carriage. The person in the carriage rests upon a seat with an upright back. The carriage is supported at its sides upon two support units each of which has an endless belt which extends along a rigid longitudinal frame with two pulleys mounted upon horizontal axes at the opposite ends of the frame, and with belts extending around those pulleys and forming two longitudinal runs between the pulleys. Each belt is formed by a continuous strip of heavy fabric with a continuous strip of flexible rubber bonded to the fabric. The belts of the support units act as brakes to retard the movement down the stairs. Each frame construction is a rigid channel member with a channel within which the bottom run of the belt is positioned, and the fabric belt has a high-friction surface which slides along the bottom surface presented by the frame construction and the entire weight is supported by those mating surfaces. The top run of each belt is held in an upper channel which insure alignment of the belts and may also impose a braking action on the free movement of the belt. The flexible rubber of the bottom runs of the belts cling to the edge of each stair step so as to permit movement of the carriage only by overcoming the braking action on the belts. A fixed handle is provided for use in moving the carriage to the stairway and directly onto the top steps by a continuous movement. An extensible handle is then pulled out so that the operator can control the carriage more readily during the descent on the stairs.
REFERENCES:
patent: 1341470 (1920-05-01), Kinnard
patent: 1949282 (1934-07-01), Murray
patent: 2072222 (1937-03-01), Schuttkus
patent: 2715533 (1955-08-01), Strausburg
patent: 2883731 (1959-04-01), Wells
patent: 3106980 (1963-10-01), Rogneby
patent: 3231290 (1966-01-01), Weyer
patent: 4033595 (1977-07-01), Mauch
patent: 4136888 (1979-01-01), Bowie, Jr. et al.
Fugate D. Lynn
Pekar John A.
Razzano Pasquale A.
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