Patent ID: 6315089
Filing Date: 2001-11-13
Classification: F16D,Y10T

Abstract:
A safety lock device comprising:a clover mechanism to be fixedly attached to a rotating shaft; the clover mechanism having a plurality of protuberances; each protuberance having a curved edge and an engagement edge; on each protuberance of the clover mechanism, the curved edge is curved on both sides of a distal portion of the protuberance and the engagement edge is substantially flat and extends only partially toward the distal portion of each protuberance; anda free-fall dog having a fulcrum with an arm and a locking finger on opposite ends of the fulcrum in an unbalanced state;wherein the free-fall dog is to be mounted such that the arm of the free-fall dog contacts the protuberances of the clover mechanism when the clover mechanism rotates with the rotating shaft and the locking finger only engages the engagement edge of the clover mechanism after a force on the arm is sufficient to overcome the unbalanced state.