Linear seat-back recliner mechanism

A spring unit for use with a linear seat-back recliner mechanism, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion, the seat back including a seat-back frame, the linear seatback recliner mechanism including an elongated recliner rod adapted for pivotal retention with the seat back, the spring unit being adapted for placement about the elongated recliner rod, the recliner rod being pivotally retained relative to the seat-back frame and extending through an actuator mechanism, the spring unit being adapted for positioning between the actuator mechanism and the seat-back frame, the spring unit including a compression spring adapted to be disposed about the recliner rod, the compression spring having a first and a second position relative to the seat-back frame, the compression spring including a plurality of first coils having a first spring diameter and a plurality of second coils having a second spring diameter, the second coils being sandwiched between the first coils, the spring unit comprising one compression spring having larger diameter coils sandwiched between smaller diameter coils, the recliner rod including a plurality of irregularities, a middle of the spring unit having the larger diameter coils for placement adjacent to the irregularities in the recliner rod.

A spring unit for use with a linear seat-back recliner mechanism, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion, the seat back including a seat-back frame, the linear seatback recliner mechanism including an elongated recliner rod adapted for pivotal retention with the seat back, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion in accordance with occupant request, the spring unit having a first and a second position relative to the seat-back frame, the spring unit comprising a plurality of inner coils having an inner mean diameter and a plurality of outer coils having an outer mean diameter, the inner coils being interior to the spring unit, the inner coils having an inner compression spring diameter, the outer coils having an outer compression spring diameter that is different from the inner compression spring diameter, the inner coils being disposed between the outer coils, the outer compression spring having a plurality of end coils with a smaller diameter such that the mean diameter of the outer compression spring is smaller than the mean diameter of the inner compression spring diameter.

A spring unit for use with a linear seat-back recliner mechanism, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion, the seat back including a seat-back frame, the linear seatback recliner mechanism including an elongated recliner rod adapted for pivotal retention with the seat back, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion in accordance with occupant request, the spring unit having a first and a second position relative to the seat-back frame, the spring unit comprising a plurality of inner coils having an inner mean diameter and a plurality of outer coils having an outer mean diameter, the inner coils being interior to the spring unit, the inner coils having an inner compression spring diameter, the outer coils having an outer compression spring diameter that is different from the inner compression spring diameter, the inner coils being sandwiched between the outer coils, the outer compression spring having a plurality of end coils with a smaller diameter such that the mean diameter of the outer compression spring is smaller than the mean diameter of the inner compression spring.

A spring unit for use with a linear seat-back recliner mechanism, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion, the seat back including a seat-back frame, the linear seatback recliner mechanism including an elongated recliner rod adapted for pivotal retention with the seat back, the spring unit being adapted for placement about the elongated recliner rod, the recliner rod being pivotally retained relative to the seat-back frame and extending through an actuator mechanism, the spring unit being adapted for positioning between the actuator mechanism and the seat-back frame, the spring unit including an outer compression spring having an annular shape and a plurality of coils and a cavity disposed therein, the spring unit having an inner compression spring having an annular shape and a plurality of coils, the inner compression spring having a smaller diameter than the outer compression spring, the inner compression spring being nested within the cavity of the outer compression spring, the outer compression spring including a plurality of coils having a smaller spring diameter disposed at one end and a plurality of coils having a larger spring diameter disposed at the other end, the inner compression spring having coils of substantially uniform diameter.

A spring unit for use with a linear seat-back recliner mechanism, the linear seat-back recliner mechanism enabling pivotal rotation of a seat back relative to a seat cushion, the seat back including a seat-back frame, the linear seatback recliner mechanism including an elongated recliner rod adapted for pivotal retention with the seat back, the spring unit being adapted for placement about the elongated recliner rod, the recliner rod being pivotally retained relative to the seat-back frame and extending through an actuator mechanism, the spring unit being adapted for positioning between the actuator mechanism and the seat-back frame, the spring unit including an outer compression spring having an annular shape and a plurality of coils and a cavity disposed therein, the spring unit having an inner compression spring having an annular shape and a plurality of coils, the inner compression spring having a smaller diameter than the outer compression spring, the inner compression spring being nested within the cavity of the outer compression spring, the spring unit including a third compression spring, the outer compression spring being disposed within the third compression spring.