Land vehicles – Wheeled – Occupant propelled type
Patent
1989-10-17
1991-06-04
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
2802501, 2803041, 280270, 297DIG4, 74421R, 74142, 74498, B62M 114
Patent
active
050208152
ABSTRACT:
A retrofitable attachment for easily and quickly converting most conventional wheelchairs into self-propelled, steerable wheelchairs. The invention includes a drive arrangement easily attachable to one of the rear wheels of the wheelchair, an elongated arm unit easily attachable adjacent one of the front casters of the wheelchair, and a connecting member extending between the arm and rear drive arrangement. The elongated arm unit has an outer drive arm portion and an inner steering arm portion, both of which are mounted for pivotal movement together about a first axis to activate the drive arrangement. Additionally, the occupant of the wheelchair can twist or rotate the inner steering arm position about a second axis to steer the front caster of the wheelchair. The steering arrangement further includes a unique gearing system that eliminates dead spots in the steering and allows for easy and uniform manipulation of the steering arm and front caster. In use and with a single hand, the occupant of the chair can both propel and steer the wheelchair as desired.
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Bradshaw Larry R.
Harris Godfrey
Noell Ralph B.
Bompey Mitchell
Carson W. Scott
Marmor Charles A.
Scott Orthotic Labs, Inc.
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