Locks – Special application – For closures
Reexamination Certificate
1998-05-06
2001-07-31
Barrett, Suzanne Dino (Department: 3627)
Locks
Special application
For closures
C070S110000, C292S034000
Reexamination Certificate
active
06266981
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a lock, and in particular a mortise lock for an exterior door. The door has a latch bolt and a further bolt located displaceably parallel with each other in a housing, wherein the further bolt can be operated by means of a key and/or a turning knob, and the latch bolt can be selectively operated by means of a latch with a follower or by means of a key or by means of a turning knob.
BACKGROUND OF THE INVENTION
A lock for an exterior door is known from German Patent Publication DE 92 08 526 U1. This known lock has a latch bolt which can be retracted into the lock housing by means of a follower on which the latch is fastened. A further bolt is located underneath the latch bolt, which can be unlocked from the lock housing by means of a profiled cylinder. In addition, the profiled cylinder can be pulled into the latch bolt by means of a changer. Such a lock was developed for the German, or the European market.
American locks have the peculiarity that, as a rule, the latch with the follower and latch bolt are arranged at the bottom and the further bolt at the top in the lock housing. Furthermore, as a rule the further bolt is operated by means of a key on the one side and a turning knob on the other side. Such locks have properties which are comparable with the locks mentioned at the outset. However, it is not possible to couple connecting rods with such locks, by means of which supplemental lock boxes, or respectively supplemental bolts are attached, through which the resistance of the door to break-ins could be increased.
OBJECT AND SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide the lock mentioned at the outset that meets the requirements of the American market and can be used in the same way as American locks, and that furthermore as many components as possible can be taken over, or respectively only small changes need to be made.
This object is attained in accordance with the present invention in that the further bolt is connected via a two-armed hinged lever with a turning element actuated by the key or turning knob, that one arm of the hinged lever is pivotably coupled with the turning element and the other arm pivotably with the further bolt, and that the two arms are pivotably connected with each other with their free ends, wherein one arm is rotatably and, if required displaceably, seated between its ends on a bearing fixed in place in the housing.
By means of this embodiment in accordance with the present invention a lock, which is based on the features of a European mortise lock, is made available for the American market. It is therefore possible to use a mortise lock having a known lock housing, known, for example, from German Patent Publication DE 92 08 526 U1. This lock is merely turned over, so that the latch bolt is at the bottom and the further bolt at the top. In order to obtain a correct turning direction for turning the further bolt forward, i.e. for extending it, with this turned-over lock, a reversal of the direction of turning is created by means of a hinged lever. The key, or respectively the turning knob, drives a first hinge arm of the hinged lever, which is pivotably fastened on the rotating element and can be rotated around a shaft fixed in place in the housing. A reversal of the turning direction is created in this way, which is transferred by the other end of this pivot arm to a second pivot arm, which acts on the further bolt and extends it out of the lock housing. With the lock in accordance with the present invention, the further bolt is extended in that the turning element is turned either by the lock or by the turning knob in the conventional direction, i.e. in that the upper half of the key, or respectively of the turning knob is turned in the locking direction. Such a mortise lock can also be connected with a connecting rod.
Further advantages, characteristics and details of the present invention ensue from the following description, wherein several exemplary embodiments are described in detail, making reference to the drawings. The features represented in the drawings as well as in the specification can be essential to the present invention both individually per se and in any arbitrary combination.
REFERENCES:
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patent: 4011741 (1977-03-01), Nolin
patent: 4578967 (1986-04-01), Yu
patent: 4606203 (1986-08-01), Esser
patent: 4870841 (1989-10-01), Cudd
patent: 5027625 (1991-07-01), Krachten
patent: 5301525 (1994-04-01), Doring
patent: 5813255 (1998-09-01), Tell, III et al.
patent: 5819562 (1998-10-01), Christ
patent: 5878605 (1999-03-01), Renz
patent: 8902020 (1989-03-01), None
Dieners Udo
Gründler Daniel
Renz Walter
von Resch Julius
Barrett Suzanne Dino
Gretsch-Unitas GmbH
Jones Tullar & Cooper P.C.
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