Device for mutually locking two elements, in particular a covering element to an element forming a support frame
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United States of America Patent
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May 18, 2004
Grant Date -
Apr 15, 2004
app pub date -
Oct 15, 2002
filing date -
Apr 13, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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