Locks – Special application – For automotive vehicles
Reexamination Certificate
2000-06-19
2002-03-05
Cuchlinski, Jr., William A. (Department: 3667)
Locks
Special application
For automotive vehicles
C070S277000, C070S278600, C070S280000, C292S144000, C292S162000, C292SDIG005
Reexamination Certificate
active
06351977
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an electrically powered door lock system and in particular to a remote controlled security door lock for installation in a wall adjacent to a door or under a door and capable of remote control operation.
2. Description of Related Art
Keyless door locks in a house or building provide a user with considerable convenience especially when the users hands are full carrying items.
U.S. Pat. No. 4,802,353 issued Feb. 7, 1989 to Corder et al discloses a battery-powered electromechanical door-lock assembly which is keyless. A bolt assembly includes electromagnetic means responsive to an input signal for energization and positioned to hold the locking assembly in the unlocked position upon energization thereof to prevent moving of the locking assembly to the locked position upon movement of the handle. The locking assembly comprises a control housing on the interior of the door including digital circuitry for the lock powered by batteries.
U.S. Pat. No. 5,525,973 issued Jun. 11, 1996 to Andreou et al discloses a remotely-operated self contained electronic lock security system. A remote hand held controller transmits coded signals to an electronic door lock. The lock is sized and configured to be utilized with a conventional doorlatch lock mechanism. For example, the mechanical “locking” portion of the apparatus and optical or radio frequency sensor is preferably constructed so as to be installable within the exterior handle of a conventional door handle; the interior handle is equipped with a battery and an electronic control device. Most of the components of conventional doorlatch locks are used.
U.S. Pat. No. 4,820,330 issued Apr. 11, 1989 to Jui-Chang Lin discloses a structure for controlling the dead bolts used in an electric lock. The lock requires the use of a special card which has an invisible coded number on it, but allows the lock to function as a common lock with the electronic part temporarily stopped.
None of the disclosed locks in the prior art have the combined features of being extra strong, remote controlled, security locks, which are not easily overcome or broken by an intruder.
SUMMARY OF THE INVENTION
Accordingly, it is therefore an object of this invention to provide a strong security door lock for a house or building which is operated by remote control.
It is object of this invention to provide a strong security door lock which is installed in a wall adjacent to a door.
It is a further object of this invention to provide an underfloor doorlock in combination with an elongated rod mounted in a door whereby a first rod extending from under the door pushes the elongated rod within the door upward into the door frame above the door thereby securing the door at the top and the bottom.
It is another object of this invention to provide for manual operation of the remote control security door lock.
It is yet another object of this invention to provide a sensor for determining that a door is closed prior to activating the remote controlled security door lock.
It is another object of this invention to provide a remote controlled security door lock system having a locking mechanism installed in a wall adjacent to a door.
It is further object of this invention to provide an emergency DC power source for operating the security system when a power outage occurs.
These and other objects are accomplished by a security door lock for mounting inside a wall comprising means for generating a signal to activate and to deactivate the door lock, means, connected to the signal generating means for extending a piston a predetermined distance in response to the activate signal, means attached to the piston for moving at least one rod the predetermined distance from a first position to a second position when activated, the rod returning to the first position when the lock receives the signal to deactivate, means, attached to the moving means parallel to the piston, for stabilizing the moving means, and the stabilizing means being secured by retaining means attached to a wall of the door lock for allowing the stabilizing means to slide the predetermined distance when the piston is extended. The moving means comprises the one rod protruding from a first area and in parallel with another rod protruding from a second area. The means for extending the piston comprises an actuator. The moving means is attached to the piston with a pair of arms extending from the moving means. The signal generating means comprises means for transmitting a coded signal, means for receiving and decoding the coded signal, means for generating the lock activating signal in response to the decoded signal when the door is closed. The signal generating means comprises a remote control transmitter. The lock comprises means for sensing the door being closed before allowing the piston extending means to be activated. The lock comprises means, extending from the stabilizing means, for manually locking and unlocking the door lock.
The objects are further accomplished by a security door lock system for mounting inside a wall adjacent to a door and a door frame comprising a remote control transmitter for generating a coded signal, receiver means for decoding the coded signal from the transmitter, means for sensing that the door is closed, means connected to the receiver means and the closed door sensing means for generating a lock control signal and an unlock control signal, actuator means connected to the lock control signal generating means for extending a piston a predetermined distance in response to the lock control signal, a rod holder bar attached to the piston for moving at least one rod the predetermined distance from a position in the door frame to a position inside the door in response to the actuator means receiving the lock signal, the at least one rod being retracted to the position in the door frame in response to the actuator means receiving the unlock control signal, a bar stabilizer portion of the rod holder bar, attached approximately perpendicular to a bar portion of the rod holder bar and parallel to the piston, for stabilizing the rod holder bar, the bar stabilizer portion being positioned a predetermined distance away from the attachment of the bar portion to the piston, and the bar stabilizer portion being secured by retaining means attached to a wall of the door lock for allowing the rod holder bar to slide the predetermined distance when the piston is extended. The rod holder bar comprises the one rod protruding from a first end area of the bar portion to within the door frame and another rod protruding from a second end area to within the door frame. The rod holder bar attaches to the piston by a pair of spaced apart arms extending from the bar portion of the rod holder bar. The lock system comprises means extending above the bar stabilizer portion for manually locking and unlocking the door lock system. The system comprises an AC power source and means for providing DC power to the system when the AC power source is unavailable.
The objects are further accomplished by a method of providing a security door lock for use in a wall adjacent to a door and a door frame comprising the steps of generating a signal to activate and a signal to deactivate the door lock, extending a piston attached to an actuator toward a door in response to the activating signal, the piston being positioned in an enclosure adjacent to the door, attaching a rod holder bar approximately perpendicular to an end of the piston, the rod holder bar comprising a bar portion and a bar stabilizer portion perpendicular to the bar portion, extending at least one rod from the bar of the rod holder bar into a door frame, moving the rod from the door frame into the door, when the piston is extended, and stabilizing the rod holder bar means by retaining means attached to a wall of the door lock for allowing the bar stabilizer portion of the rod holder bar to slide in parallel with the extending piston. The step of generating a signal to activate and a signal to dea
Oliveria Duarte M.
Pedroso Paul L.
Cuchlinski Jr. William A.
Marc-Coleman Marthe
Pearson & Pearson LLP
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