Advancing of apparatus for refurbishing overhead structures
US4454818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1981 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Oct 16, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G5/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A coupling trolley is provided for a rail or runway beam that is longitudinally translatable relative to a member located above and extending transversely of the rail or runway beam. The trolley has rollers to engage and support the rail or runway beam via upper flanging thereof, and has first and second supporting engagers for the member, specifically lower flanging thereof. The trolley is movable with the rail or runway beam and relative thereto. When the trolley is stopped by its first engager reaching said member as the rail or runway beam is advanced with the trolley, the second engager of the trolley is movable by the end of the rail or runway beam, from non-engagement towards and into securing engagement with the member where it is held by cooperation with the upper surface of the rail or runway beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.