Adjustment Mechanism For A Seat

An assembly for use in a seat having a seat frame, said assembly comprising:

• a seat support adapted for adjustable suspension in the seat frame, with said seat support adjustable in a first adjustment direction and a second adjustment direction opposite said first adjustment direction;
• a chassis mounted on said seat support;
• a screw drive supported on said chassis for rotation in a first rotational direction and in a second rotational direction opposite said first rotational direction;
• an actuator operably coupled to said screw drive to selectively generate said rotation of said screw drive;
• a drive block in threaded engagement with said screw drive such that said rotation of said screw drive in said first rotational direction translates said drive block along said chassis in a first translational direction and rotation of said screw drive in said second rotational direction translates said drive block along said chassis in a second translational direction opposite said first translation direction;
• a first cable having first and second segments (310, 320) with said first segment adapted for attachment to the seat frame, and said second segment having first and second portions with said first portion engaging said chassis and said second portion affixed to said drive block;
• a second cable having first and second segments with said first segment adapted for attachment to the seat frame, and said second segment having third and fourth portions with said third portion engaging said chassis and said fourth portion affixed to said drive block;
• wherein said second and fourth portions concurrently translate with said drive block in said first translational direction when said screw drive operates in said first rotational direction adjusting said seat support in said first adjustment direction and wherein said second and fourth portions concurrently translate with said drive block in said second translational direction when said screw drive operates in said second rotational direction adjusting said seat support in said second adjustment direction.