Patent ID: 6932206

Claim:
A one-way clutch mounted to an annular space formed between a driving side member and a driven side member for transmitting rotation of the driving side member in one direction to the driven side member, the one-way clutch comprising: a plurality of sprags arranged at the annular space along a circumferential direction thereof; a first cage formed on an inner side at the annular space, wherein the first cage includes: a first plurality of retaining pockets for retaining the plurality of sprags; and at least one non-retaining pocket which does not retain any of the plurality of sprags, wherein a sum of a number of the first plurality of retaining pockets and a number of the at least one non-retaining pocket formed on the first cage is greater than a number of the plurality of sprags; a second cage formed on an outer side at the annular space, wherein the second cage includes a second plurality of retaining pockets for retaining the sprags, and wherein a total number of pockets formed on the second cage is equal to the number of the plurality of sprags; an annular spring member disposed between the first cage and the second cage, wherein the annular spring member includes: a plurality of urging pockets for urging the plurality of sprags to thereby erect the plurality of sprags; and at least one non-retaining pocket which does not urge any of the plurality of sprags, wherein the first plurality of retaining pockets and the at least one non-retaining pocket of the first cage are formed through the first cage at a pitch of a substantially equal angle in the circumferential direction, and wherein respective positions of the first plurality of retaining pockets of the first cage, respective positions of the second plurality of retaining pockets of the second cage, and respective positions of the urging pockets of the spring member correspond to each other in the radial direction thereof.