Patent Number: 7,131,302

Title: Keyway plug for safe deposit locks

Abstract: A keyway plug that discretely provides a device for preventing a person from unlocking a tumbler lock even if the correct key is used. The present invention includes a plug member that is sized to fit entirely within a keyhole and is effective to block a key from being completely inserted into the keyhole. The plug may be removed from the keyhole through use of an extraction tool having a magnet which attracts the plug and magnetically couples the plug to the extraction tool when the tool comes into contact with the plug.

Inventors: Waskiewicz; James Richard (Livonia, MI), Yonkus; Michael Frank (Dearborn, MI)

Assignee:

International Classification: E05B 17/14 (20060101); E05B 47/00 (20060101)

Expiration Date: 2019-11-07 0:00:00