
A hydraulic driving mechanism for a vehicle wheel includes a housing and three piston-cylinder assemblies pivoted to side plates of the housing. Each assembly communicates with hydraulic fluid under pressure and a reciprocating piston rod of each assembly drives a pinion through a surrounding eccentric and driving ring when the assembly is rocked in an arc about its pivot connection. The assemblies and corresponding pinions are located around and in mesh with the outer periphery of a central pin...











