Crane apparatus
US4768442A · kind A · utility
17Cited by
11References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Oct 1, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B25/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Overhead crane apparatus is disclosed incorporating an extruded aluminum alloy rail structure for runway and bridge girder applications. The relatively light weight and low cost rail structure is shaped to provide a trolley passageway protected from the ingress of deleterious substances, and is further contoured to provide a shaped cavity for ready reception of novel clamp means facilitating the imposition of increased loads on existing crane apparatus. The rail structure during the extrusion process may also be formed with fluid passages in the side walls thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.