Power transferring apparatus

An apparatus for transferring power, said apparatus comprising:

• a shaft, said shaft having first and second ends, said shaft having an axial centerline;
• a pair of shoes, said shoes being in contact and in operative association with said second end of said shaft, said shoe having radially inward and radially outward surfaces, said shoes being radially outwardly displaceable between first and second positions, in said first position said shoes being radially inward and in said second position said shoes being radially outward;
• an outer member, said outer member having an interior surface which defines a recess, said recess of said outer member being non-circular, said shoes being located within said recess, said radially outward surface of said shoes engaging said interior surface of said outer member and transferring rotational energy from said shaft to said outer member in said shoes or in said second position, said outer member freely rotatable when said shoes are in said first position;
• and,
• a guide, said guide having lateral edges, said lateral edges of said guide being adjacent lateral edges of said shoes and restraining said shoes to move along a line, said guide further comprising a first end, said first end of said guide fitting into said second end of said shaft.