Hollow formwork elements for producing concrete structures

Details Hollow formwork elements for producing concrete structures Hollow formwork elements for producing concrete structures

1974-05-22

1976-08-10

Husar, Francis S.

Static molds

Having inflatable element

249178, B28B 732

Patent

active

039737497

ABSTRACT:
The present invention relates to reusable hollow formwork elements of elastic material which may be used for the concreting of pipelines, and which by filling with a gaseous or liquid medium, can be given compressive resistance. The invention also relates to a method of operating such formwork elements.

REFERENCES:
patent: 1600353 (1926-09-01), Nose
patent: 2485898 (1949-10-01), Mathews et al.
patent: 2579423 (1951-12-01), Ford
patent: 2949658 (1960-08-01), Conn
patent: 3104441 (1963-09-01), Smith
patent: 3352529 (1967-11-01), Haas
patent: 3648963 (1972-03-01), Smith

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