Patent ID: 8776557

Claim:
A hidden shackle style lock comprising; a substantially cylindrical housing having a top surface, a bottom surface, and a curved side surface; a first cavity on the bottom surface of the housing extending part way along a thickness of the housing; a second cavity on the side surface intersecting with the first cavity; a hollow sleeve slidably attached within the second cavity, the sleeve including a first end face, a second end face, and a third cavity, the third cavity extending from the first end face to the second face and being substantially coaxial with the second cavity; a shackle having a first end and a second end fixedly coupled to the first end face of the sleeve; and an interchangeable core having a first locking mechanism and a second locking mechanism lockingly disposed within the third cavity and coupled to the straight shackle, the interchangeable core being configured to, operate the first locking mechanism to rotate the shackle, and operate the second locking mechanism to unlock the interchangeable core from the third cavity.