Method for the casting of hollow slabs out of concrete
US4608216A · kind A · utility
10Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B7/28
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method for the casting of hollow slabs out of concrete by slide-casting. Concrete mix is extruded onto a base (18) preferably by means of a conical screw spiral (2). Thereinafter the mix is compacted by moving a cavity mandrel (3) fitted after the screw sprial. The end of the cavity mandrel (3) is moved along a path of movement of desired shape. The final end of the mandrel may be attached to the machine by means of a ball joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.