Pulsating slip form apparatus and method

Details Pulsating slip form apparatus and method Pulsating slip form apparatus and method

1987-03-27

1988-09-06

Corbin, David H.

Plastic and nonmetallic article shaping or treating: processes

Forming structural installations in situ

Repositioning or moving mold to form sequential portions of...

405146, 425 59, 425 63, E04B 116, E21D 1110

Patent

active

047691921

ABSTRACT:
A method and apparatus for forming wet concrete employing a slip form having a radially expandable elastic outer shell comprising pouring concrete around the exterior surface of the outer shell and applying a fluid under pressure to the interior surface of the outer shell. The pressure of the fluid is pulsated so that the outer shell expands and contracts to reduce the friction between the outer shell and the concrete. The reduction in friction allows the form to be moved longitudinally along the concrete with reduced tearing of the surface of the concrete.

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patent: 4437788 (1984-03-01), Walbrohl
patent: 4456401 (1984-06-01), Williams
patent: 4600373 (1986-07-01), Swanson

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