Theft prevention device
US6044670A · kind A · utility
17Cited by
7References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jan 12, 1999 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Jan 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5867
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.