Torsion adapter

A torsion adapter for use with prosthetic limbs, the torsion adapter comprising:

• a receiver portion comprising:
• a receiver plate;
• a spring groove;
• and
• an aperture offset from a center of the receiver portion;
• a coupler portion comprising:
• a coupler plate including a coupler for attaching a prosthetic limb;
• a spring groove complementary to the receiver portion spring groove;
• and
• an aperture offset from a center of the coupler portion;
• wherein:
• when the receiver portion is coupled to the coupler portion, the spring groove of the receiver portion and the spring groove of the coupler portion create a spring pocket;
• a spring occupies the spring pocket;
• when the receiver portion is coupled to the coupler portion, the aperture of the receiver portion aligns with the aperture of the coupler portion to create an offset axis of rotation such that the coupler portion may rotate about the offset axis from a set position relative to the receiver portion;
• and
• the spring biases the coupler portion to rotate back to the set position.