Patent ID: 7478716

Claim:
Gearshift mechanism for a synchronized gear change transmission of a motor vehicle, comprising a gear shift sleeve displaceably supportable on a synchronizer body arranged to be brought into operative engagement with a gear wheel, first and second recesses being formed in an inner peripheral face of the gearshift sleeve and locking blocks each with a member engaging in the first and second recesses in certain shift positions being provided on the synchronizer body, and a spring associated with and spring-loading a respective one of the members, with the spring associated with one of the members having a spring characteristic different from that associated with the other of the members such that the first and second recesses have lateral slopes for applying axial contact forces with different force peaks in cooperation with the respective spring-loaded member as the gearshift sleeve is displaced, wherein for a preliminary and subsequent synchronization, the first and second recesses are arranged offset relative to one another in a circumferential direction in the inner peripheral face of the gearshift sleeve, with the first and second recesses being constructed differently from each other such that they have different widths in an axial direction.