Bi-directional overrunning clutch assembly for transfer cases and the like

A controllable, double overrunning clutch assembly comprising, in combination,

• a first member defining an axis of rotation and having a plurality of pairs of pawls,
• a second member having a plurality of pairs of surfaces engageable by said pawls,
• a first portion of said plurality of pawls and surfaces disposed to provide drive from said first member to said second member upon relative rotation therebetween in a first direction and overrunning between said members upon relative rotation therebetween in a second, opposite direction,
• a second portion of said plurality of pawls and surfaces disposed to provide drive between said first member and said second member upon relative rotation therebetween in said second direction and provide overrunning between said members upon relative rotation therebetween in said first direction, and
• a control sleeve moveable along said axis and cooperating with said plurality of pairs of pawls to selectively control engagement and disengagement of said plurality of pairs of pawls with said driven member.

An active double overrunning clutch assembly comprising, in combination,

• a first member disposed on an axis and including a first plurality of pawls disposed in paired, opposed relationship with a second plurality of pawls,
• a second member disposed on said axis and adjacent said first member and engageable by said first and said second pluralities of pawls,
• said first plurality of pawls including first cam tracks and said second plurality of pawls including second, distinct cam tracks, and
• a sleeve operably disposed adjacent said first and said second cam tracks for translation along said axis for selectively providing at least two operational modes wherein said clutch assembly drives and overruns in a first relative direction of rotation and drives and overruns in a second relative direction of rotation, opposite to said first relative direction of rotation.