Hollow core concrete extruder
US4943219A · kind A · utility
2Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1989 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Jul 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/118
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved slipform for use in a machine for casting hollow core concrete planks includes at least one angled baffle plate in the core material receiving ports so as to deflect the core material from directly impacting the lower concrete. This lessens the possibility of tears and holes in the lower layer caused by the core material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.