(57) A linkage unit for drive members of self-propelled vehicles, such as manual lever
or pedal actuators for the forward travel and reversing of a self-propelled vehicle,
comprising two linkage members (7) to be connected to said forward travel and reversing
actuators, said members being keyed onto two parallel shafts (33a, 33b) and being
linked in such a manner as to rotate in phase opposition between a rest position determined
by an elastic repositioning device, and two opposing operative positions determined
by the activation of one or the other of said actuators, in which said linkage members
and said repositioning device are located within an enclosing casing (10, 100, 101,
120) acting as a frame to be removably fixed to the structure of the self-propelled
vehicle, and from which said shafts emerge with means (133) for the quick connection
of said actuators, said linkage members being connected together by a connecting rod
(77).
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