Multiple concrete form apparatus
US3931952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1973 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jun 11, 1993 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G19/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for forming concrete buildings that have numerous identical portions, which minimizes the set-up time for a group of forms, by permitting the forms to be individually released from set concrete while constantly maintaining the positions of the forms on a subform. The apparatus includes several forms with flanges that rest on a subform, several bolts for each form that project through flanges of the forms and through holes in the subform, and a spring for each bolt to urge its lower end downwardly with respect to the subform. After concrete is poured on the forms and partially sets, the subform is lowered a few inches even though the forms may remain stuck in the concrete, and then each form is individually freed from the concrete. As each form is freed, the bolts guide it down to its original position on the subform. The subform and forms then can be moved as a unit to a new location in the building where another identical concrete portion is to be formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.