Locks – Special application – For closures
Patent
1997-09-08
2000-03-14
Gall, Lloyd A.
Locks
Special application
For closures
70120, 292 39, 292142, E05C 912
Patent
active
06035674&
DESCRIPTION:
BRIEF SUMMARY
RELATED APPLICATIONS
This application claims priority from German Patent Application No. 195 07 852.7 filed in the Federal Republic of Germany on Mar. 7, 1995.
1. Field of the Invention
This invention is related generally to door locks and, more particularly, to door locks with multiple locking rods that act in conjunction with lock receptacles or lock elements on a cabinet body, and can be brought into a locking position from an open position, and the reverse by means of a lock.
2. Background of the Invention
A door lock of this type is known from EP 0 373 068 A1, whereby locking areas are created on all sides of the door, except for the locking side. This known door locking device, however, requires a complicated lock that must be specifically adapted to the number of locking rods.
A door lock for an entrance door is known from FR A 2 592 085. With this known door lock multiple horizontal locking rods are respectively formed as paired push rods that move in opposite directions by means of respective drive sprockets. Additional sprockets are arranged on the push rods, moving in the same direction by means of an endless chain or toothed rack, so that the push rods of all locking rods move in common. The locking takes place with a separate lock.
As DE 23 01 371 C3 shows, a door lock is also known that has multiple turnbuckles as locking elements that are coupled with a common lock by means of linkages. In this case a distinction is made between primary and secondary turnbuckles. The primary turnbuckles are connected to a crank of the common lock by means of rods and control the secondary turnbuckles by means of control levers. This known door lock requires rods that are adapted to the dimension of the door and control levers, as well as specially designed turnbuckles with one or more guide pieces.
From DE 89 00 484 U1 a door lock is known whereby the door bears two oppositely moving locking strips with locking bolts, working in conjunction with lock receptacles in the frame of the door. The two locking strips each have a toothed rack. The toothed racks engage with a drive sprocket and move opposite each other. This known door lock is also adapted to the size of the door and uses specially manufactured lock parts.
OBJECTS OF THE INVENTION
It is an object of this invention to provide a door lock overcoming some of the problems and shortcomings of devices of the prior art.
Another object of this invention is to provide a door lock which can be constructed using commercial locks and locking devices.
Another object of this invention is to provide a door lock which can be constructed by means that allow one to easily increase the number of locking areas. How these and other objects are accomplished will be apparent from the following descriptions and from the drawings.
SUMMARY OF THE INVENTION
The invention involves an improvement to a door lock for a cabinet having a door with multiple locking rods that act in conjunction with lock elements on a cabinet body wherein the locking rods are mounted for movement between an unlocked position and a locked position.
The improvement is characterized by the fact that the locking rods comprise first and second pairs of push rods. First and second drive sprockets engage, respectively, the rods comprising the first pair of rods and the rods comprising the second pair of rods. The first drive sprocket moves, in opposite directions, the rods comprising the first pair of rods and the second drive sprocket moves, in opposite directions, the rods comprising the second pair of rods. The improved lock also includes first and second additional sprockets which are coupled, respectively, to the first and second drive sprockets. Also, the first and second additional sprockets engage a coupling rod that causes rotation of the second drive sprocket and the second additional sprocket when the first drive sprocket is rotated.
In one embodiment of the invention, the door has interior and exterior surfaces and the pairs of rods are aligned in parallel and mounted adjacent to the inter
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Gall Lloyd A.
Rittal-Werk Rudolf Loh GmbH
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