Switchable ratcheting clutch

A method of operating a switchable clutch comprising:

• rotating a cam ring clockwise with respect to a first ring to transition from a free-free mode to a first one-way mode wherein, in the free-free mode, a second ring is permitted to rotate in either direction with respect to the first ring and wherein, in the first one-way mode, the second ring is permitted to rotate in a first direction with respect to the first ring but is prevented from rotating in a second direction with respect to the first ring;
• rotating the cam ring further clockwise with respect to the first ring to transition from the first one-way mode to a first lock-lock mode wherein, in the first lock-lock mode, the second ring is prevented from rotation in either direction with respect to the first ring;
• and
• rotating the cam ring counter-clockwise with respect to the first ring to transition from the free-free mode to a second one-way mode wherein in the second one-way mode, the second ring is permitted to rotate in the second direction with respect to the first ring but is prevented from rotating in the first direction with respect to the first ring.

A switchable clutch comprising:

• an inner ring;
• an outer ring having an internal tooth profile and supported for rotation with respect to the inner ring;
• a cam ring supported for rotation through a first range with respect to the inner ring;
• a plurality of pawls supported by the inner ring;
• and
• a plurality of ratcheting springs, each ratcheting spring urging a respective pawl radially toward the cam ring and positioning the respective pawl with respect to the outer ring based on a relative rotational position of the cam ring with respect to the inner ring, such that
• in a first relative rotational position, the respective pawl does not engage the outer ring,
• in a second relative rotational position, the respective pawl engages the tooth profile to prevent rotation of the outer ring with respect to the inner ring in a first direction while permitting relative rotation in a second direction,
• in a third relative rotational position, the respective pawl engages the tooth profile to prevent rotation of the outer ring with respect to the inner ring in the second direction while permitting relative rotation in the first direction,
• in a fourth relative rotational position, the respective pawl engages the tooth profile to prevent rotation of the outer ring with respect to the inner ring in both the first and second directions.