ApplicationNo. 585801 filed on 09/20/1990
US Classes:70/211, Externally mounted locking device70/416Tampering prevention or attack defeating
ExaminersPrimary: Gall, Lloyd A.
Attorney, Agent or Firm
Foreign Patent References
International ClassE05B 013/08
AbstractAnti-rotation lock apparatus prevents the rotation of a deadbolt key or handle by holding the key or handle from the inside of a door. The apparatus includes a base element which fits over the key or lock handle and an extension which extends from the base element and which is braced against the doorknob or doorknob assembly to prevent rotation of the base element and of the key or handle on which the base element is disposed.