1996-10-16
1999-03-16
Gall, Lloyd A.
70304, 70312, E05B 3712
Patent
active
058815880
DESCRIPTION:
BRIEF SUMMARY
The present invention pertains to a safety lock that consists of a socket and a locking component that can be inserted in and connected to the socket, with the locking component comprising at least one detent cam that can be turned by means of an implement that is inserted into the locking component, and with the detent cam engaging into a contact surface in the socket in its locked position.
Safety locks of this type are generally known. In such safety locks, the most frequently used implement is a key. However, it was determined that these known safety locks do not provide a sufficient theft deterrent because they can be opened relatively easily by means of special tools or duplicate keys. Replacing the key/lock mechanism with combination locks is also known. However, these combination locks do not represent a significant obstacle for correspondingly trained specialists.
The present invention is based on the objective of improving a known safety lock in such a way that a practically absolute theft deterrent is attained. Although it is impossible to open the lock forcefully, the safety lock can be opened by the user with relatively simple means.
According to the invention, this objective is attained by the arrangement of least two rotatable, offset pins in the locking component such that they extend parallel to its longitudinal axis X--X, that one respective detent cam is arranged on the end regions of the aforementioned pins which are situated inside of the socket, and that the upper end of the pins which is accessible from the outside comprises an implement attachment part. Due to the design according to the invention, the locking component in particular can be constructed in solid form massive, because only the bores for the pins and the corresponding recesses for the detent cams need to be arranged in the locking component. Consequently, the safety lock is largely protected from mechanical damage. In order to release the safety lock, the detent cams must be turned to a very precise position via the implement attached to the pins so as to disengage the detent cams from the contact surface. The locking component can only be displaced inside of the socket or removed from the socket in this particular position. Since there exist almost arbitrary combinations of the detent cam positions, it is practically impossible to locate the release position. However, the locking component can be turned inside of the socket in any position of the pins or the detent cams, so that it is impossible to transfer a torque, e.g., for forcibly opening the lock.
The invention is described in detail below with reference to the embodiments illustrated in the enclosed figures.
BRIEF DESCRIPTION OF THE DRAWINGS
The figures show:
FIG. 1, a longitudinal section through a safety lock according to the invention;
FIG. 2, a view of the locking component in the direction of the arrow II in FIG. 1, and
FIG. 3, a longitudinal section through an additional embodiment of a safety lock according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a safety lock according to the invention. This safety lock consists of a socket 1 and a locking component 2 that can be inserted in and connected to the socket 1. In the embodiment shown, the socket 1 essentially has the shape of a hollow cylinder and comprises an opening 3 for inserting the locking component 2 on one end and a base 4 that, in particular, is constructed in concave fashion and provided with a central through-opening 5 on its other end. The safety lock shown may, for example, be used as a safety lock for the handlebar of a bicycle. In this case, the socket 1 of the safety lock is welded laterally onto the side of the frame part that accommodates the handlebar of the bicycle. The curvature of the concave base 4 is adapted to the circumference of the frame part that accommodates the handlebar. At least two, preferably three, rotatable pins 6 that are arranged offset to one another extend inside of the locking component 2 parallel to its longitudinal axis
REFERENCES:
patent: 1327406 (1920-01-01), Racow
patent: 1347708 (1920-07-01), Ponting et al.
patent: 1994240 (1935-03-01), Bennett
patent: 2032821 (1936-03-01), Waits
patent: 4499745 (1985-02-01), Ricouard et al.
Altenloh, Brinck & Co. GmbH & Co. KG
Gall Lloyd A.
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