Gearshift device

摘要

A gearshift device for shifting gears to control pistons including a gearshift lever attached to a rocking shaft operated directly by a piston in a cylinder. The rocking shaft and cylinder are transverse each other, and a recess in the piston accommodates the rocking shaft. Through an engaging tooth and recess arrangement swivel action of the shaft and shift lever is effected. Alternative engaging formations may be provided. The casing for the gearshift may be integral the gearbox casing or a separate compact unit.