Land vehicles – Wheeled – Extensible
Patent
1976-02-23
1977-05-31
Song, Robert R.
Land vehicles
Wheeled
Extensible
280647, 280650, B62B 1100
Patent
active
040265684
ABSTRACT:
A foldable wheelchair includes a pair of sides each having an upstanding backrest support member, and a soft backrest suspended between both members. Below each member there is mounted a side wheel for propelling the chair. A pair of seat supports interconnect the sides. Each seat support includes two upstanding rectangular panels having inner ends that are hingedly interconnected and outer ends that are hingedly connected to respective sides. A seat is mounted between the sides and is supported by the seat supports when the wheelchair is infolded. The seat includes two rectangular panels having inner ends that are hingedly interconnected and outer ends that are hingedly connected to respective sides. A longitudinal bar interconnects the hinged inner ends of the seat supports and a tee portion at one end of the bar carries a wheeled footrest. When the bar is drawn forwardly, the chair is unfolded to provide an extended wheelbase and the respective parts of the chair are locked in place by the weight of a person on the seat. The wheelbase is shortened and the chair folded for storage by pushing the bar rearwardly between the sides which folds the seat supports rearwardly and the seat upwardly.
REFERENCES:
patent: 2431112 (1947-11-01), Everest
patent: 2847058 (1958-08-01), Lee
patent: 3142351 (1964-07-01), Green
patent: 3331614 (1967-07-01), McClintock
Sakovich Michael M.
Song Robert R.
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