Patent ID: 7726739

Claim:
A seat structure comprising a base, a back and a bolster located on at least one edge of the base or back, the bolster including an upholstered cover and a support structure for controlling the position of the upholstered cover, the support structure comprising: a support member pivotally mounted in the support structure for pivotal movement between a raised position in which the support member supports the upholstered cover in a raised state, and a lowered position in which the upholstered cover is no longer supported in the raised state; a first strut member pivotally connected to the support member; a second strut member pivotally connected to the first strut member to form with the first strut member an over-centre strut, wherein an over-centre position of the over-centre strut, the first and second strut members are fully extended so as to hold the support member in the raised state; and actuator means for tripping the over-centre strut from the over-centre position to allow the support member to move from the raised position to the lowered position.