Abstract:
This is a device, which will be inserted over the doorknob and behind a dead bolt. It will prevent a dead bolt from turning in the event that someone with a key tries to enter the home or business while the space is being occupied.

Description:
BACKGROUND OF THE INVENTION 
     A. Field of the Invention 
     It is sometimes important, particularly for apartment dwellers, but also homeowners to prevent entry of an individual into the home. Most doors leading into a house or apartment have both the standard door lock as well as a deadbolt. This device would be inserted in the space between the deadbolt lock and the deadbolt plate from the inside of the door. A series of indentations or channels encircle the deadbolt handle. When the key is inserted into the deadbolt and turned this device would prevent the deadbolt from turning and unlocking the door. 
     B. Prior Art 
     There are many other examples of prior art, which are related to deadbolt security systems. Representative examples of these include Murphy, U.S. Pat. No. 5,052,202, Katsaros U.S. Pat. No. 4,715,200, and Runt U.S. Pat. No. 5,193,373. 
     The closest relevant prior art to the current idea is Murphy. In the Murphy application the top surface of the device fits over the deadbolt lock. A securement device is employed to prevent the deadbolt lock from moving in the event that a key is turned. Additionally, a set of forks surrounds the door handle. In Murphy the grooves are limited to two possible positions—vertical and horizontal—and are flush with the side of the deadbolt lock. 
     Unlike Murphy, the current device does not surround but is indented so that the device will be inserted behind the deadbolt. A series of indentations or channels, which are provided at different angles prevents the deadbolt from turning if entry is attempted. This series of indentations or channels are necessary in the event that the deadbolt is locked in other than a vertical or horizontal position. This device completely surrounds the door handle to insure that the device remains on the door when not in use. 
     Unlike the other referenced prior art this device does not required modification of the existing deadbolt door lock and has no moving parts. 
     BRIEF SUMMARY OF THE INVENTION 
     This is a device, which will prevent an unnecessary or unwanted intruder from entering a home, business or apartment when it is occupied. Most doors used a deadbolt locking system and this device prevents the deadbolt from turning when the key is being used to attempt to unlock the deadbolt. 
     This device is particularly helpful in situations such as apartment complexes when various individuals, i.e. maintenance personnel, apartment managers etc. must access the apartment for needed repairs. This could also be used by women as an added security measure in their homes or apartments. 
     Most standard apartments do not have a lock on the door knob and are only equipped with a deadbolt to secure the door. The door allows ingress and egress to the home, business or apartment while the deadbolt is the only means of providing securement of the door and is secured more firmly to the doorjamb. The deadbolt is comprised of the lock itself, an entry point for the key, plates for the interior and exterior of the door and a deadbolt handle, which is located in the interior of the building. The deadbolt handle moves when the door is locked and unlocked. The deadbolt handle allows the homeowner to securely lock the door after entry into the apartment or home. 
     This device will be inserted between the inside deadbolt plate surface and the surface of the deadbolt handle, which is closest to the door. A series of indentations or channels in the device, which are angled would surround the deadbolt when the device is installed. A hollow portion would be positioned between the placement behind the deadbolt and the door handle. The bottom portion would surround the door handle. 
     In operation as someone begins to turn the deadbolt from the exterior with a key the indentation or channel would prevent the deadbolt from turning the necessary number of degrees to allow the door to be unlocked. The device would use the door handle to further insure that the device would not slip off the deadbolt or door handle and prevents the deadbolt from turning. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of the device. 
         FIG. 2  is a back view of the device. 
         FIG. 3  is a side view of the device. 
         FIG. 4  is a view of the device installed on a door. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     This device is comprised of a top section  8  that surrounds the deadbolt of a standard deadbolt and a bottom section  9  that surrounds a door handle  10 .  FIG. 4  The top portion  8  and bottom portion  9  are essentially circular and are connected to each other by two parallel connecting members  12 , which join the two circular portions of this device.  FIG. 1  The space between the two connecting members is hollow to allow the device to slip over the door handle  10  and dead bolt handle  15 . 
     The top section  8  having an outer perimeter, is flat and circular with a hole in the center of the top section, wherein the hole defines an inner perimeter of the top section, which has an outer perimeter and an inner perimeter.  FIG. 1  The deadbolt handle  15  fits within this portion of the device  5 . A series of indentations or channels  25  are provided on the top section with the bottom of the indentations or channels formed by a back surface of the top section and the indentations or channels having an opening extending through the outer and inner perimeter. Between the series of indentations or channels  25  are raised surfaces  30 . Although the device is flat with a series of indentations  25 , it allows the deadbolt handle  15  to fit within the indentations or channels  25  when it is installed.  FIGS. 1 ,  4   
     The indentations or channels  25 , which are provided, are large enough to allow the deadbolt handle  15  to be inserted within the indentation or channel and allow the deadbolt handle  15  to be surrounded by enough of the surface of the raised surfaces  30  to prevent the deadbolt handle  15  from turning the required amount of degrees to open the door when a key in inserted into the key entry on the outside. 
     The top portion would be installed such that it would fit between the faceplate  20  of the deadbolt and the back surface of the deadbolt handle  15 .  FIG. 1  This would allow easy installation of this device and simplicity. No modification to the door assembly or to the deadbolt or lock of the door would be required. 
     Two connecting members  12  connect the top portion  8  of this device  5  to a bottom section  9  of this device  5  and form one integrated piece. These connecting members  12  are essentially parallel to each other. The bottom portion  9  when the device  5  is installed surrounds the door handle  10  on the bottom. The advantage to completely surrounding the door handle  10  is to ensure that the device stays on the door and also gives an added measure of protection to the deadbolt being turned when a key is placed in the deadbolt key entry access. Additionally when it is not in use the device can simply hang from the door and always be available and easily found. 
     This device  5  is designed to be lightweight and the choice of material may include plastic, rubber, or a variety of other materials.