Land vehicles – Wheeled – Extensible
Patent
1994-05-25
1996-05-14
Focarino, Margaret A.
Land vehicles
Wheeled
Extensible
280 4317, 414495, B66F 1900
Patent
active
055161286
ABSTRACT:
A truck which has first wheels that are fixed to the front part of a bed with arms put in between so freely as to move up and down and designed to roll backward and forward in the longitudinal direction when in touch with the ground, second wheels that are fixed to the arms with bearing arms put in between so freely as to move up and down and designed to roll right and left in the lateral direction when in touch with the ground, and a rear wheel that is fixed to the bed with a hydraulic pressure cylinder put in between and capable of changing its direction by the turning of a pumping handle which works the cylinder. An arm of which one end is rotatably joined to the bed with a fulcrum link put in between is provided to the inside of the bed and joined to one end of a swiveling arm of which the other end is rotatably joined to one of the arms in order that the first wheels can be raised up from the ground by the movement of the arm in association with the rising movement of the bearing arms coupled with the movement of the arms to lower the second wheels down on the ground.
REFERENCES:
patent: 2727752 (1955-12-01), Gold
patent: 2993703 (1961-07-01), Pardise
patent: 3352569 (1967-11-01), Goodacre
patent: 3544127 (1970-12-01), Dobson
patent: 3576333 (1971-04-01), Danielson et al.
patent: 3814456 (1974-06-01), Bryntse
Ikemoto Hisao
Nakade Kenichi
Okuda Hitoshi
Tanda Kiyoji
Focarino Margaret A.
Mar Michael
Okudaya Giken Co.
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