Locks – Operating mechanism – Key
Patent
1994-03-02
1995-10-17
Cuomo, Peter M.
Locks
Operating mechanism
Key
70359, 70409, 70421, 70492, E05B 2706
Patent
active
054579740
ABSTRACT:
A key and rotary cylinder for a safety lock are disclosed. The key has in its shank a continuous bore hole in which two opposite control elements are supported. These control elements are movable inwardly against the restoring force of a pressure spring arranged in the bore hole. An additional tumbler is lifted by a control element when the key is inserted into a key slot of the rotary locking cylinder. This additional tumbler engages in a recess of the stator. When using a key without a control element, the rotor is blocked by means of the tumbler. When using a key according to the invention, the rotor can be turned and the tumbler is lifted out of the recess and the control element is moved inward radially. After turning by 90.degree., for example, a counterpin of the stator is brought into line by the tumbler. In the absence of a control element, the rotor is blocked by the counterpin in this case as well.
REFERENCES:
patent: 4434636 (1984-03-01), Prunbauer
patent: 4612787 (1986-09-01), Prunbauer et al.
patent: 4667495 (1987-05-01), Girard et al.
patent: 5123268 (1992-06-01), Eizen
Cuomo Peter M.
Dino Suzanne L.
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