Patent ID: 6993944

Claim:
A dead bolt lock for removably engaging and securing a dead bolt knob on a door having a door knob, comprising: a housing; a pair of legs extending from said housing for engaging the door knob; and an opening provided in said housing for receiving the dead bolt knob and preventing the dead bolt knob from turning and unlocking the door, wherein said opening in said housing is round and comprising at least two notches provided in said housing; a front plate rotatably closing one side of said housing, and a front plate slot provided in said front plate; a rear plate rotatably closing the opposite side of said housing from said one side and a rear plate slot provided in said rear plate, said rear plate slot registering with said front plate slot in said front plate; a middle plate rotatably disposed in said opening in said housing, said middle plate connected to said front plate and said rear plate and a middle plate slot provided in said middle plate, said middle plate slot registering with said front plate slot and said rear plate slot for removably receiving the dead bolt; and a notch retainer slidably disposed in said middle plate for releasably engaging a selected one of said notches in said housing and substantially aligning said front plate slot, said middle plate slot and said rear plate slot with the dead bolt knob when said front plate, said middle plate and said rear plate are rotated and locked in concert with respect to said housing by operation of said notch retainer.