Theft prevention device

Details Theft prevention device Theft prevention device

1999-01-12

2000-04-04

Gall, Lloyd A.

Locks

Special application

For closures

70232, 215360, 220236, 411 55, 411910, B65D 5514

Patent

active

060446706

ABSTRACT:
A theft prevention device is provided for an anhydrous ammonia tank having a feed pipe with an open end. The theft prevention device includes a plug body which is inserted into the open end of the feed pipe. The plug body includes a flexible member which can be expanded by a keyed lock actuator so as to engage the interior of the feed pipe and prevent removal of the plug member. Locking and unlocking of the plug member to the interior of the feed pipe can be accomplished only by use of a key having a predetermined configuration which fits the keyed lock actuator.

REFERENCES:
patent: 3130571 (1964-04-01), Neumann
patent: 3540245 (1970-11-01), Pope
patent: 4035921 (1977-07-01), Williams
patent: 4160511 (1979-07-01), Hukuta et al.
patent: 4884422 (1989-12-01), Walter
patent: 5261259 (1993-11-01), Ployd
patent: 5802895 (1998-09-01), Osgood

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