Patent ID: 8226101

Claim:
A torsion system comprising: a housing adapted to be secured to a structural portion of a vehicle; a shaft having a core portion accommodated in the housing and defining at least one concavity in the core portion, the shaft having a connector end connected to a crank arm, the connector end protruding out of the housing; and at least one elastomeric member received in the concavity of the shaft, the elastomeric member having a geometry so as to at least partially fill the concavity and contact an inner surface of the housing; a rotation of the crank arm resulting in a deformation of the elastomeric member, wherein: the shaft has a pair of surfaces of cylindrical shape at opposed ends of the core portion; support blocks are provided to operatively support the supported surfaces in the housing and such that the shaft is rotatable about its longitudinal axis; and the shaft has one of the supported surfaces between the core portion and a flange, such that the support blocks maintain the shaft captive within the housing.