Method and apparatus for forming hollow concrete elements

Details Method and apparatus for forming hollow concrete elements Method and apparatus for forming hollow concrete elements

1977-05-25

1978-10-10

Husar, Francis S.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249 65, 249 91, 249153, 249179, 425219, B28B 732

Patent

active

041196953

ABSTRACT:
A method and a device to cast elongate concrete structural members formed internally with channel means in horizontal moulds. The channel means is formed by a double-wall inflatable hose of an elastic and flexible material which is introduced into the mould and is provided with support walls extending between the inner and outer hose walls so as to divide the space therebetween into longitudinal chambers. After inflation of these chambers, concrete is poured about the hose while at the same time weights displaceable in the interior of and in the longitudinal direction of said hose, exert a load on the hose, thus preventing it from being lifted from its predetermined position inside the mould by the concrete.

REFERENCES:
patent: 857584 (1907-06-01), Boyle
patent: 2299111 (1942-10-01), Rogers et al.
patent: 2977658 (1961-04-01), Smith et al.

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