Patent Application
20080100067
This invention relates to an emergency door opening tool set and method for opening a door in an emergency and more particularly to an emergency door opening tool set and method for opening a locked door without damage to the door.
In emergency situations, rapid access to a structure through a locked door maybe critical. For example, Emergency Medical Technicians (EMTs), fireman and policeman may need access to a locked building. In many such cases, the EMTs, fireman and police may enter the building by means of a battering ram, pry bar, lock cutter and cutting and removal tools and the like. Some of these approaches result in the destruction of a door. Other approaches focus on the lock mechanism.
For example, a U.S. Pat. No. 4,597,123 of Cobe, Jr. discloses a combination firefighter's tool. As disclosed therein, the tool includes an elongate handle, one end of which tapers into a wedge shape that is used for prying. The other end includes an arcuate portion with inwardly angled projections creating a spanner wrench for use with hose couplings. One side of the arcuate portion includes a cylindrical member with a flat face suited for a hammering operation. The other end of the arcuate portion includes claw members diverging from a narrow portion proximal the arcuate member and cooperates with the arcuate member in a prying operation. A pin member extends in a plane perpendicular to the plane formed by the elongate handle and the arcuate member and is located for use in removing hinge pins from doors.
A more recent Patent Application Publication No. 2004/01776662 of Bosse discloses a Lock Removal Tool. As disclosed therein, a lock removal tool is a forcible entry tool designed to facilitate forcible entry through a locked door or other barricaded entry ways during an emergency situation. The lock removal door comprises an elongated bar having a lock cutting tool on one end and a tool piece such as a screw driver or allen wrench extending from the other end. A slide hammer mechanism having first and second impact collars fixed near the ends of the bar and a weight slideably disposed on the bar between the impact collars allows a significant force to be imparted to the lock cutting tool. The lock cutting tool itself is a flat metal plate with a bifurcated leading edge, the bifurcation forming a lock cutting slot. The leading edge is tapered to allow the lock cutting tool to be inserted underneath a door knob or locked base palte.
Notwithstanding the above, it is presently believed that there is a need and maybe a commercial market for an emergency door opening tool set in accordance with the present invention. There should be a need because such sets are primarily designed for use with a particular type of lock as widely used in Kuwait. Further, such tool sets can be used to gain access to a room or structure through a locked door with little or no damage to the door and minimal damage to a lock assemble. Further, such sets are durable, relatively compact, relatively inexpensive to manufacture and relatively easy to carry and store in an inexpensive carrier such as a fabric bag.
In essence, the present invention contemplates an emergency door opening tool set for EMT's, fireman and police. The tool set includes a first tool such as a screwdriver for removing an outer cover or face plate that covers a lock assembly. The tool set also includes a second tool comprising an elongated bar and a metal block disposed at one end of the elongated bar. The metal block preferably has a cube shape with a face surface that defines a recess or opening having the shape of an outwardly projecting lock member. This recess is adapted to fit over the outwardly projecting lock member in close proximity to or slidable engaging the sides of the outwardly projecting locking member. Applying lateral force, the elongated bar breaks the outwardly projecting locking member which can then be readily removed from the lock assembly. The tool set also includes a third tool which includes an elongated bar and a T-shaped handle at one end thereof. A latch turning element is provided at the opposite end for insertion into an opening remaining after breaking and removing the outwardly projecting lock member and rotating the third tool to retract a latch bolt out of a strike plate. In this way, the door can be opened without damage to the door.
The invention also contemplates a method which includes the steps of providing the three tools as set forth above. The method then includes the step of using the screwdriver or the like to remove a cover plate from the outer surface of a door. The second tool is then positioned with the recess or opening in the metal block encompassing the outwardly projecting lock member and a lateral force is applied to the elongated bar to break off the outwardly projecting lock member. The broken off piece of the lock member is discarded and the third tool is used to retract a latch bolt so that the door can be opened without damage to the door or door frame.
The invention will now be described in connection with the following figures wherein like reference numerals have been used to designate like parts.
The cover plates 2 are fastened to a door with a plurality of wood screws 14 which are easily removed with a conventional screwdriver. Removal of the cover plate leaves a relatively large portion of the element 8 or element 9 exposed for engagement by a first tool 20. For example, a key shaped opening or recess 24 maybe slipped over the key shaped element 8.
The second tool 20 includes an elongated bar 22 with a generally cube shaped metal mass 23 at one end of the elongated bar 22. A suitable handle 24 is disposed at the opposite end of the elongated bar 22. The metal mass 23 may be in the form of a cast medal block or a plurality of metal sheets fixed together in a conventional manner. For example, the metal sheets may be held together by one or more bolts, spot welding, soldering or the like.
The cube shaped metal mass 23 and 23′ also include a front surface 25 that defines a key shaped recess 26 (as shown in
A second tool 30 is illustrated in
The second tool 30 also includes a latch turning element 36 at a forward end of the elongated bar 32. The element 36 projects outwardly at a 90° angle and are adapted to retract a striker bolt by rotation of the T-shaped handle 34 after insertion into the lock assembly.
While the invention has been described in connection with its preferred embodiments it should be recognized that changes and modifications can be made therein without departing from the scope of the appended claims.
