| 摘要 |
A device to be clamped onto a tire which punctures the sidewalls of the tire when an unauthorized attempt is made to move the vehicle or pry the device from the tire. The device includes two jaws that slide toward one another to substantially close around the tire thereby positioning teeth on the jaws close to the sidewalls. The jaws are engaged with a ratchet locket mechanism that permits sliding the jaws together for attachment around the tire but which prevents the jaws from sliding apart unless released with a key. The locking mechanism is protected from tampering by a cover with a hole for inserting the key. The hole is remote from the locking mechanism and the key is elongated providing that cryogenic fluid inserted into the cover hole can not reach the locking mechanism such as might be attempted in an effort to embrittle the locking mechanism.
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