Patent ID: 6957730

Claim:
A centrifugal clutch engagement apparatus, comprising: a clutch unit including first driving friction plates in engagement with a clutch outer basket connected to an engine power source and driven friction plates interleaved with the first driving friction plates and in engagement with a clutch inner hub penetrating through the center of said first friction plates and connected to a transmission source, a centrifugal pressure plate apparatus comprising an upper thrust retainer fixed to said clutch inner hub, a rotating hub rotatable relative to and substantially axially fixed relative to said upper thrust retainer, and a pressure plate coupled rotationally to said clutch outer basket and said rotatable hub, said centrifugal pressure plate apparatus including a means for generating increasing axial motion of said pressure plate in response to increasing rotational motion of said centrifugal pressure plate apparatus, whereby the increasing rotational motion of said centrifugal pressure plate apparatus in response to increasing rotational motion of said clutch outer basket causes said pressure plate to move axially and apply a force to said driving friction plates to said driven friction plates causing rotational motion of said clutch inner hub.