180 / | HD | MOTOR VEHICLES |
|
252 | DF | HAVING AT LEAST ONE WHEEL BOTH DRIVEN AND STEERABLE {4} |
253 | DF | .~ Steerable wheel has exclusive axis of pivot (i.e., stub-axle type) {1} |
254 | | .~.~ Including flexible, axially rotatable means having one portion fixed to vehicle and another portion pivotable with wheel for transmitting drive thereto {5} |
255 | DF | .~.~.~> Pivotable portion of means has additional structure of gearlike nature in driving engagement with corresponding structure on wheel |
256 | DF | .~.~.~> Means comprises rotatable shaft containing plural universal joints {1} |
258 | DF | .~.~.~> Pivotable portion of means includes ball or socket element of ball-and socket type universal joint {1} |
260 | DF | .~.~.~> Pivotable portion of means includes gear element of intermeshing gear type universal joint {1} |
263 | DF | .~.~.~> Having axis of pivot disposed between parallel planes defined by opposite sides of wheel |