Patent ID: 9682642
Date: 2017-06-20
CPC Classifications: B60N

Claim:
1. A seat suspension interposed between a vehicle body floor and a seat, wherein: the seat suspension comprises a first elastic member having a positive spring constant is a load value increases as an increase of a displacement amount, to bias the seat side in a direction to depart from the vehicle body floor side and a second elastic member with a negative spring constant is a load value decreases relative to an increase of a displacement amount, functioning in a predetermined displacement range, the first and second elastic members being structured to form a dead zone where superposed spring constants of the first and second elastic members become substantially zero in the predetermined displacement range, and to damp input vibrations by operation of the dead zone; and the seat suspension has an active control mechanism comprising three disposed pantograph links and controlling the pantograph links corresponding to input vibrations from the vehicle body floor, and displacing the seat side in six-axis directions.