Patent ID: 8348041

Claim:
A dog-tooth-face interface for a vehicle, comprising: a first clutch element having a plurality of recesses distributed on a side of the first clutch element and around an axis through said first clutch element; a second clutch element having a plurality of teeth configured to engage with said recesses and distributed on a side of the second clutch element adjacent said recesses; at least one of said first clutch element and said second clutch element being configured so as to rotate about said axis and at least one of said first clutch element and second clutch element being configured so as to move along said axis to engage or disengage said first and second clutch elements; and said first clutch element having a substantially continuous wall surrounding said recesses, and said recesses further having at least one corner relief portion configured to avoid contact with corners of said teeth; said first clutch element includes openings on an inner side of said recesses through which said teeth can, when engaged with said recesses, extend radially inward in a direction towards said axis past an engagement with said first clutch element for increased bending strength of said teeth.