# US 4,391,462 A · Anti-theft locking device adaptable to containers

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- Number: US 4,391,462 A
- Document ID: US4391462A
- Status: Granted
- Kind: A
- Application number: 06/288,831
- Filed: 1981-07-31
- Granted: 1983-07-05
- Earliest claimed: 1980-08-08
- Assignees: Societe Navale Chargeurs Delmas-Vieljeux
- Inventors: Guy Loreal
- Web page: https://patentgrep.com/patent/US4391462A

## CPC

- E05B 83/10: Rotary bars
- Y10S 292/32: Freight car door fasteners
- Y10T 292/1049: Rigid
- Y10T 292/1089: Sliding catch
- Y10T 292/34: Portable
- Y10T 292/696: With movable dog, catch or striker
- Y10T 292/79: Bolt guards
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The anti-theft device comprises essentially a movable vertical plate extending through an opening formed in the rain-strap overlying the doors of the container; this plate is adapted to drop by gravity to a position in which it is located behind lug extensions of the upper ends of the lock rods associated with each door panel to prevent the opening movement of the rods as long as the movable plate is not raised to a position overlying the lugs, this movable plate being rigid with a horizontal cover plate disposed on top of the container and prevented from being raised to a height sufficient for releasing the rods by another stacked container.

## Claims

### Claim 1

In a container presenting hingedly mounted doors maintained in tight-sealing closure position by at least one rotating vertical rod provided at its ends with locking members engaging fixed stops of the door frame, an anti-theft locking device which comprises:
a rain-strap opening provided in a front extension of the container roof in the vicinity of the upper end of said rotating vertical rod,
a lug-shaped upper extension of the rotating vertical rod being placed in front of an upper portion of the door frame and providing, in the closure position of the rotating vertical rod, a free space in relation with said door frame, and
a vertically movable plate engaging said rain-strap opening and moving downwards by gravity to lodge into the free space between said upper extension of the rotating vertical rod and said supper portion of the door frame,
whereby the rotating vertical rod can be released to open the doors only when said movable plate has been raised sufficiently, this upward movement of the movable plate being normally prevented in any container supporting another, stacked container, by this other container.

### Claim 2 (depends on 1)

Anti-theft device for container according to claim 1, wherein said vertically movable plate is rigid with a horizontal plate overlying the top of the container to limit the downward movement of said movable plate.

### Claim 3 (depends on 1)

Anti-theft device for container according to claim 1, wherein said movable plate comprises on its outer face extending at a level below that of the opening in which said plate is adapted to slide, at least one projection to prevent the removal of said movable plate from the opening and furthermore likely to facilitate the upward movement of the movable plate which is necessary for releasing the rotating vertical rods to open the doors.

### Claim 4 (depends on 1)

Anti-theft device for container according to claim 1, wherein the lateral edges of said movable plate are adapted to slide in fixed guiding slideways of the door frame which are provided beneath said rain-strap opening through which said movable plate is engaged.