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AssigneeSaint-Gobain Pam
InventorsJean-Claude Hauer, Patrice Vauthier
Estimating the term…
To endow such a device, of the type with a bolt (1) actuated by a key (2), with a high level of tamper-proofing and security without compromising its simplicity and reliability, the device includes two bolt-guiding members (3, 4) carried by one of the two elements, and the bolt includes a key-inserting aperture (114), two guiding ramps (112, 113) cooperating with the guiding members, and a third guiding ramp (115) cooperating with the key (2) when the latter is inserted into the aperture (114), in order to selectively actuate the bolt (1) from a locking position to an unlocking position, and vice versa, by rotation of the key. Use: devices for closing roadway or footway manholes, or underground technical chambers.
Locking device for mutually locking a first and second element, in particular a covering element (T) to an element forming a support frame (C) for the covering element, of the type including a movable bolt (1) and a key (2) for actuating the bolt, characterised in that it further includes two bolt-guiding members (3, 4) carried by one of the said first and second elements (T, C), and the bolt (1) includes a key-inserting aperture (114), two guiding ramps (112, 113) adapted to cooperate with the two guiding members (3, 4) respectively, and a third guiding ramp (115) adapted to cooperate with the contour of the key (2) when the latter is inserted into the said aperture (114), in order to selectively actuate the bolt (1) from a locking position to an unlocking position or from an unlocking position to a locking position, by rotation of the key (2).
Device according to either one of claims 2 and 3, characterised in that the other bolt-guiding member (3) is carried by the first element (T) and is formed by a member for securing the bolt to the first element, and the guiding ramp (112) adapted to cooperate with this member is a wall of an oblong hole (111) which is made in the bolt and into which the securing and guiding member (3) is inserted.
Dependencies are inferred from the claim text.