Locks – Operating mechanism – Using a powered device
Reexamination Certificate
1999-11-15
2001-11-20
Gall, Lloyd A. (Department: 3627)
Locks
Operating mechanism
Using a powered device
C070S279100, C070S283000, C292S144000, C292S150000
Reexamination Certificate
active
06318138
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a door lock, and more particularly to a door lock for controlling access into a room or building with a portable remote controller.
2. Background of the Related Art
Various remotely controlled door locking devices have been developed over the years to more securely, efficiently, and easily control access to various structures. Typically, electrically actuated door locks require door preparation to install lock, in addition to installation of other components to complete a remotely activated system. Other components include an on-off system switch, a momentary release switch, a request to exit device, a power transformer to convert 110 volt ac current to required operating voltage, as well as wiring connected to join all of the components. Such devices are most often added after completion of the structure to meet changed or increased security needs. Providing the installation of components and necessary wiring to connect these components is often a significant portion of the cost to the purchaser.
Examples of remotely controlled security devices and related locks are described in the following U.S. Pat. No. 4,762,350 to Hurtado, U.S. Pat. No. 5,083,448 to Karkkaincn et al., U.S. Pat. No. 4,262,504 to Inoue, U.S. Pat. No. 4,412,356 to Klaus et al, and U.S. Pat. No. 4,926,664 to Gartner et al.
The '350 patent discloses a remotely controlled electric door locked having a tubular housing affixed to a door between a pair of securing brackets positioned on either side of the door opening frame. Electric motors within the housing move slide members into and out of engagement with the securing brackets. Installation of the lock is somewhat time intensive and securing brackets must be in proper alignment.
The '448 patent discloses a locking device that is mounted within a cavity in a door, thus is relatively difficult to install requiring formation of such cavity. As well as being mechanically complex, guiding and centralizing of latch and bolt relative to respective receiving member is crucial.
The '504 patent discloses an electric locking system that is also manually operable. The lock is mounted in a cavity in the door opening frame and wall of structure, requiring an involved installation procedure.
The '356 patent discloses a locking system that is remotely operable by a transmitter generating a light beam to unlock the door. Such transmitting devices are commonly known as “line of sight” transmitters. In other words, transmitter must be pointed directly at receiver to activate mechanism.
The '664 patent disclosed a safe door lock which incorparates a bolt which is moved into and out of a gate notch in a bar. With the bolt retracted from the gate notch thereby freeing the bar to move, pivots and levers cooperate with the movement of the bar to operate two latches which cooperate with corresponding pairs of strike plates in the door frame. In other words, the bolt is positioned to lock or unlock the bar. The bar, when unlocked, is then operated manually to move a pair of latches to open or close the door.
3. Objects and Advantages
In response to these deficiencies in the prior art, it is an object of the present invention to provide a remotely controlled door lock that installs in a much easier and faster manner than current methods.
It is a further object to provide such a door lock that is electrically operated and also capable of manual operation from either side of the door without electrical power.
Another object is to simplify the electromechanical components as much as practical by incorporating a locking bar which interacts directly with the latch of the door thereby providing the desired locking and unlocking action.
It is a still further object to provide such a door lock that requires no external wiring of any kind for remotely controlled operation.
SUMMARY OF THE INVENTION
The objects described above, as well as other objects and advantages are achieved by a remotely operated door lock that includes foremost a lock housing that is easily mounted to an inner face of door adjacent the edge. A spring biased latch being beveled on two faces is moveable along a linear path as defined by lock housing between extended and retracted positions. Means are mounted within lock housing for moving a latch blocking bar by electrical power into or out of a path perpendicular to latch, thereby blocking or allowing latch to retract into housing, locking or unlocking the door. Means are further disposed in the lock housing for manually urging the latch blocking bar out of the path of latch, independent of electrical moving means. Means are also disposed in the lock housing for receiving a wireless energy signal and controlling the operation of electric moving means with a control signal triggered by the wireless energy signal. Portable means are provided independently of lock housing for transmitting the wireless energy signal to the receiving and controlling means. A latch receiving member is provided for mounting to the door opening frame for engaging the spring latch to urge it to its retracted position as the door is being closed, and receiving latch in its extended position when the door is fully closed. The electrical power supply is a suitable battery with an on-off switch disposed between the battery and receiving and controlling means for opening and closing the circuit.
REFERENCES:
patent: 655476 (1900-08-01), Carleton
patent: 1361317 (1920-12-01), Dulczewski et al.
patent: 1833572 (1931-11-01), Hardesty
patent: 3751088 (1973-08-01), Schlage et al.
patent: 4262350 (1981-04-01), Inoue
patent: 4412356 (1983-10-01), Klaus et al.
patent: 4669283 (1987-06-01), Ingenhoven
patent: 4762350 (1988-08-01), Hurtado
patent: 4902053 (1990-02-01), Hakkarainen et al.
patent: 4904005 (1990-02-01), Frolov
patent: 4926664 (1990-05-01), Gartner et al.
patent: 5083448 (1992-01-01), Karkkainen et al.
patent: 5473922 (1995-12-01), Bair et al.
patent: 5715715 (1998-02-01), Nunez
patent: 5920268 (1999-07-01), Bucci et al.
patent: 5943888 (1999-08-01), Lawson
patent: 5983739 (1999-11-01), Feder
patent: 6035676 (2000-03-01), Hudspeth
patent: 10446 (1903-01-01), None
patent: 57484 (1911-07-01), None
patent: 176394 (1922-03-01), None
patent: 1342729 (1974-01-01), None
patent: 352014000 (1977-02-01), None
Kuenzel Rainer
Mathews Kurt
Bracewell & Patterson L.L.P.
Gall Lloyd A.
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