Method for sealing and stripping a concrete form
US3939234A · kind A · utility
5Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1972 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Aug 14, 1992 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G19/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A device for sealing the air hole in a concrete form while concrete is poured over the form, including a cap of resilient material having a dome-like top and a cruciform shaft extending from the concave side of the top for reception in the air hole of the form. When the dome is pressed down to form a dimple therein, the fact that the dimple remains indicates that the shaft is firmly seated in the air hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.