Closure fasteners – Bolts – Sliding
Reexamination Certificate
2000-09-26
2003-07-01
Swann, J. J. (Department: 3677)
Closure fasteners
Bolts
Sliding
C049S015000, C049S018000
Reexamination Certificate
active
06585303
ABSTRACT:
BACKGROUND
The present invention generally relates to door locking and operating mechanisms, such as to door locking and operating mechanisms which are often employed in prisons. The invention more specifically relates to a door locking and operating mechanism which can readily be configured for use with a right or left-handed door.
Typically, door locking and operating mechanisms, such as those which are often employed in prisons, are “handed,” meaning that a given mechanism is configured to work either with a door which opens to the left (a “left-handed door”) or with a door which opens to the right (a “right-handed door”). Specifically, a typical door locking and operating mechanism consists of several individual components, some of which are “handed.” In other words, a “left-handed” mechanism (a door locking and operating mechanism which is designed for use with a left-handed door) has parts which generally cannot be readily used in a “right-handed” mechanism (a door locking and operating mechanism which is designed for use with a right-handed door). Hence, prison maintenance staff, for example, must keep in stock an inventory of “left-handed” parts (for use in a left-handed mechanism) as well as an inventory of “right-handed” parts (for use in a right-handed mechanism).
Such “handed” mechanisms also generally provide that the parts are generally widespread in the mechanism and that each part must be individually installed into a housing over a door frame. As a result, replacing an entire mechanism is generally tedious and time consuming.
Many of the mechanisms provide that a vertical lock bar locks the door in place. However, the mechanisms also provide that the vertical lock bar can be manually manipulated from the bottom of the vertical lock bar, such as by an object inserted under the door, to lift the vertical lock bar and unlock the door. Of course, in situations where it is important to have strict security, such as in prisons, this is not desirable.
OBJECTS AND SUMMARY
An object of an embodiment of the present invention is to provide a door locking and operating mechanism which is generally “non-handed” in that the mechanism can be employed with a left or right-handed door without having to substitute parts.
Another object of an embodiment of the present invention is to provide an easily attachable or detachable self-contained device mechanism plate with selectable handing for use with either left hand or right hand door housings.
Still another object of an embodiment of the present invention is to provide a door locking and operating mechanism which provides that a vertical lock mechanism cannot generally be manually manipulated from the bottom of the vertical lock bar, such as by an object inserted under the door, to lift the vertical lock bar and unlock the door.
Briefly, and in accordance with at least one of the foregoing objects, the present invention provides a door locking mechanism which includes a lockhead member which includes a door stopping portion. The lockhead member is moveable from a locked position, wherein the door is double deadlocked, and an unlocked position. A vertical locking mechanism is coupled to the lockhead member, and the vertical locking mechanism deadlocks the door when the lockhead member is in the locked position. The door stopping portion of the lockhead member also deadlocks the door when the lockhead member is in the locked position. A carriage assembly is engaged with the door, and the carriage assembly is engageable with the door stopping portion and moves the lockhead member from the locked position to the unlocked position. The vertical locking mechanism disengages the door when the lockhead member is in the unlocked position and the door stopping portion of the lockhead member also disengages the door. A motor is driveably engaged with the carriage assembly. Movement of the carriage assembly causes the carriage assembly to engage the door stopping portion of the lockhead member and move the lockhead member to the unlocked position.
REFERENCES:
patent: 4190985 (1980-03-01), Richards et al.
patent: 4621451 (1986-11-01), Bruehler
patent: 4641458 (1987-02-01), Pilcher et al.
patent: 4723373 (1988-02-01), Jump
patent: 4872284 (1989-10-01), Bentley
patent: 4897959 (1990-02-01), Worden
patent: 4982528 (1991-01-01), Michel
patent: 5241787 (1993-09-01), Norman
patent: 5299385 (1994-04-01), McConnell
patent: 5866999 (1999-02-01), Schmelzer et al.
Coose Ronald
Pavey Brian
Ho Thomas
R.R. Brink Locking Systems, Inc.
Swann J. J.
Trexler, Bushnell Giangiorgi, Blackstone & Marr, Ltd.
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