Anti-pilferage lock for box car doors
US3981524A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | May 27, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0833
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A railway box car side includes a door opening having a sliding door arrangement with a conventional hasp locking device provided at the lower portions of the door so as to be readily accessible to a person standing at track level. The door arrangement, which may be of a single or double door type, includes an anti-pilferage lock which is positioned near the upper ends of the doors so as to be relatively inaccessible except when the box car has arrived at a loading platform. The anti-pilferage lock includes a keeper positioned on one of the doors in a two door arrangement or the said keeper is positioned on the door post of the car opening in a single door arrangement. The keeper includes an outwardly projecting hook-shaped wall arrangement having a vertical recess. A latch support is positioned on one of the doors and includes a vertical guideway in which a latch device provided with an arm and slide member is slidingly positioned. The arm includes a hook-shaped end portion with a tongue slidingly engageable with a vertically extending recess provided in the keeper. The latch arm is movable from a lowered position vertically into locking position with respect to the keeper and is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.