Patents in subclass Bridges/Locking Devices
Parent class: Bridges
| Number | Patent title | Issue Date |
|---|---|---|
| 06701562 | Span lock with centering guide A span lock system for a double-leaf drawbridge. A guide housing mounted at the tip of one leaf includes an opening with vertically opposed cushioned shoes slidably supporting an elongate lock bar reciprocative lengthwise in a direction... |
03/09/2004 |
| 06701562 | Span lock with centering guide A span lock system for a double-leaf drawbridge. A guide housing mounted at the tip of one leaf includes an opening with vertically opposed cushioned shoes slidably supporting an elongate lock bar reciprocative lengthwise in a direction... |
03/09/2004 |
| 06588041 | Pre-load adjustment for span lock system A drawbridge span lock system in which a locking bar longitudinally slides between wear shoes in each of guide and socket assemblies. The wear shoes are pre-loaded to a selected level by springs within the assemblies to maintain... |
07/08/2003 |
| 06588041 | Pre-load adjustment for span lock system A drawbridge span lock system in which a locking bar longitudinally slides between wear shoes in each of guide and socket assemblies. The wear shoes are pre-loaded to a selected level by springs within the assemblies to maintain... |
07/08/2003 |
| 06453494 | Movable bridge center lock The center locks of a bascule or other type of double leaf movable bridge are fitted on bearings mounted upon the main bridge girders, so that the center lock bars may be moved, when the bridge is in the lowered position, along a... |
09/24/2002 |