Patents in subclass Bridges/Covering
Parent class: Bridges
| Number | Patent title | Issue Date |
|---|---|---|
| 06817444 | Suspended work platform A cable suspended hermetic structure having a floor and walls combining with the undersurface of superstructure substructure such as a bridge forming an enclosure defining a workspace wherein one or more persons having access to the... |
11/16/2004 |
| 06338175 | Movable safety tunnel for use during bridge maintenance A movable safety tunnel rides on parapets within a bridge. The safety tunnel is locked in place in a respective section of the bridge while maintenance or other operations are performed on that section of the bridge. This allows the... |
01/15/2002 |
| 06170106 | Movable safety tunnel for use during bridge maintenance A movable safety tunnel rides on parapets within a bridge. The safety tunnel is locked in place in a respective section of the bridge while maintenance or other operations are performed on that section of the bridge. This allows the... |
01/09/2001 |
| 5680664 | Bridge structure A bridge including a metal tubular space frame enclosed in a housing shell made principally from fibre reinforced plastics material which is maintenance free and protects the frame from corrosion. The upper surface of the housing shell... |
10/28/1997 |
| 5678374 | Method of reinforcing concrete made construction and fixture used therefor A method of reinforcing a concrete made construction comprising the steps of provisionally disposing a reinforcement member onto a lower surface of a concrete made construction, forming holes at the lower surface of a concrete made... |
10/21/1997 |