Device for force-opening doors

A device for force-opening doors, comprising:

• an anchoring member including two sections relatively movable from a retracted position permitting the anchoring member to be applied between the doorframe posts on opposite sides of the door, to an extended position bringing the opposite ends of the two sections of the anchoring member into firm engagement with the doorframe posts;
• each of said opposite ends of the two sections of the anchoring member including a plate having a wedge at one side for wedging the plate between the door and the respective doorframe post, and at the opposite side, a face extending transversely to the longitudinal axis of the respective section and formed with a plurality of teeth which become embedded in the respective doorframe post when the two sections are moved to their extended positions, and thereby firmly anchor the anchoring member between the two doorframe posts;
• and a ram member carried by the anchoring member for engagement with the door when the anchoring member is anchored to the doorframe transversely across the door;
• said ram member including a piston-and-cylinder force-multiplying device for producing a large force against the door to force-open it;
• said anchoring member also including a force-multiplying device for moving the two sections of the anchoring member into firm engagement with the doorframe posts.

A device for force-opening doors, comprising:

• an anchoring member including two sections relatively movable from a retracted position permitting the anchoring member to be applied between the doorframe posts on opposite sides of the door, to an extended position bringing the opposite ends of the two sections of the anchoring member into firm engagement with the doorframe posts;
• each of said opposite ends of the two sections of the anchoring member including a plate having a wedge at one side for wedging the plate between the door and the respective doorframe post, and at the opposite side, a face extending transversely to the longitudinal axis of the respective section and formed with a plurality of teeth which become embedded in the respective doorframe post when the two sections are moved to their extended positions, and thereby firmly anchor the anchoring member between the two doorframe posts;
• and a ram member carried by the anchoring member for engagement with the door when the anchoring member is anchored to the doorframe transversely across the door;
• said ram member including a hydraulic device for producing a large force against the door to force-open it.