Static molds – Core – Including means to expand or contract core
Patent
1976-12-06
1977-10-25
Flint, Jr., J. Howard
Static molds
Core
Including means to expand or contract core
249171, 249185, E04G 1506, B28B 730
Patent
active
040553213
ABSTRACT:
An inside articulated and collapsible form adapted for use in the formation of a rectangular concrete corewall and having at its corners novel three-way hinge assemblies including main hinge leaves which are movable between right angular positions wherein the four form sides with which they are associated assume extended positions wherein their panel facings conform to the outline of the inside face of the corewall to be formed by pouring wet concrete around the form, and acute angle positions wherein such form sides assume collapsed positions which are inwardly removed from such outline while the hinge leaves constitute rub rails which guide the collapsed form axially along and within the surrounding hardened concrete corewall during removal of the form the formed corewall. Secondary hinge leaves at the outer or distal ends of the main hinge leaves afford attachment facilities for connecting the main hinge leaves to the form sides while locking flanges on the main hinge leaves are capable of being removably bolted to the secondaryhinge leaves in order to maintain the form in its extended condition of use.
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Flint, Jr. J. Howard
Gerlach Norman H.
Symons Corporation
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