Isolating decoupler

1. An isolating decoupler comprising:

a hub;

a one-way clutch engaged with the hub;

a pulley rotationally engaged with the hub on a first ball bearing and second ball bearing;

a spring operationally engaged between the one-way clutch and the pulley; and

an inertia member engaged with the hub through an elastomeric member, the inertia member disposed within an envelope comprising the pulley and a first pulley support engaged with the first ball bearing and second pulley support engaged with the second ball bearing, the inertia member moveable independently of the pulley.

2. The isolating decoupler as in claim 1 further comprising a carrier member disposed between the spring and the one-way clutch.

3. The isolating decoupler as in claim 1 , wherein the inertia member is substantially coplanar with the pulley.

4. An isolating decoupler comprising:

a hub;

a one-way clutch engaged with the hub;

a pulley rotationally engaged with the hub through a first pulley support and a second pulley support;

a spring operationally engaged between the one-way clutch and the first pulley support;

a carrier member disposed between the spring and the one-way clutch; and

an inertia member engaged with the hub through an elastomeric member, the inertia member substantially disposed within a width of the pulley and the inertia member is substantially coplanar with the pulley, the inertia member moveable independently of the pulley.

5. The isolating decoupler as in claim 4 further comprising a first ball bearing between the hub and the first pulley support and a second ball bearing between the hub and the second pulley support.