Self-propelled slip form method
OwnerJay P. Nielsoninventor
Life of this patent
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Abstract
A self-propelled slip form, closed at its top, front, and sides, but open at its rear and bottom, provides a pressure chamber having the cross-sectional shape of a wall or similar structure to be cast. Such slip form may be advanced continuously at a slow rate or in stages, but whichever it is, the advance is due solely to pressure exerted against the closed front of the slip form through the intermediacy of the deposited, unset concrete or the like. Such pressure can be utilized to pre-stress reinforcing material on a continuous basis as it is fed into the pressure chamber simultaneously with deposit of the concrete or the like.
Claims13
A method of casting and forming concrete spirally in a continuous band, comprising feeding concrete mix into a slip form which is closed at its front, top, and sides but is open at its rear and bottom;
- and applying pressure to the said closed front of the slip form through the intermediacy of the fed concrete, so as to advance the slip form spirally solely by reason of said pressure, while constraining said slip form to rotate about a fixed center.
A method of casting and forming concrete spirally in a continuous band, comprising feeding wet concrete into a slip form closed at its front, top, and sides but open at its rear and bottom and advancing the slip form spirally solely by reason of the said feeding, while constraining it to rotate about a fixed center.
Dependencies are inferred from the claim text.