Apparatus for manufacture of precast concrete building units
OwnerM. Omar A. Jazzarinventor
Life of this patent
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Abstract
A U-shaped, half-room precast concrete building unit is molded in an open box-like framework having four L-shaped corner assemblies, facing pairs of horizontal legs of which are respectively joined by laterally-extending telescoping spacers, and facing pairs of vertical legs of which are respectively each joined by two laterally-spaced longitudinally-extending plates. Inserts having alternating voids and blocks are placed longitudinally between the vertical leg pairs to form complementary block and void patterns on the molded unit juncture edges. Retainers having projections are placed over the top edges of the plates to form complementary tongue and groove portions. Relative dimensions of the molded unit are selectable through adjustment of the relative positionings of the corner assemblies.
Claims16
Apparatus for the molding of a precast concrete building unit comprising a horizontal web, and flanges respectively joined at opposite juncture edges to the web and extending vertically therefrom out toward extremities of the flanges;
- said apparatus comprising:
- two longitudinally-spaced pairs of L-shaped corner assemblies;
- each assembly including a vertical leg having a base, and a laterally-extending horizontal leg having an end joined to said vertical leg at said base and having a free end facing the corresponding free end of another assembly of the same pair;
- two laterally-extending spacers, each having opposite ends respectively telescopingly received within the facing free ends of the assemblies of each pair;
- adjustable means releasably locking the position of said spacers relative to said free ends to establish the lateral spacing of said assemblies of each pair and, thereby, establishing a lateral dimension of the web of the building unit;
- two pairs of laterally-spaced vertically-oriented plates, each pair of plates extending between corresponding vertical legs of associated longitudinally-spaced assemblies of each of said pairs of assemblies;
- the spacing between said plates in each of said pairs of plates establishing a lateral dimension of the flanges of the unit;
- each of said plates having a top edge;
- means removably mounting said plates on said corner assemblies;
- inserts, having alternating block and void forming members, positioned longitudinally between each of said corresponding vertical legs and between each of said pairs of plates, for forming complementary block and void patterns on the juncture edges of the unit;
- and
- retainers, removably located over the top edges of each of said pairs of plates and respectively including tongue forming means and groove forming means for forming corresponding tongue and groove portions on the extremities of the flanges of the unit.
Apparatus for the molding of a precast concrete building unit comprising a horizontal web, and flanges respectively joined at opposite juncture edges to the web and extending vertically therefrom out toward extremities of the flanges;
- said apparatus comprising:
- two longitudinally-spaced pairs of L-shaped corner assemblies;
- each assembly including a vertical leg having a base and an upper end, and a laterally-extending horizontal leg having an end joined to said vertical leg at said base and having a free end facing the corresponding free end of another assembly of the same pair;
- and each assembly comprising a rectangular cross-sectioned, hollow tubular member having an internal channel;
- two laterally-extending spacers, each comprising an elongated rectangular cross-sectioned element having opposite ends respectively telescopingly received within the internal channels at said facing free ends of the assemblies of each pair;
- adjustable first means releasably locking the position of said spacers relative to said free ends to establish the lateral spacing of said assemblies of each pair and, thereby, establishing a lateral dimension of the web of the building unit;
- vertically-extending extensions respectively telescopingly received within the internal channels at said upper ends of the assemblies;
- adjustable second means releasably locking the positions of said extensions relative to said upper ends to establish the heights of said assemblies and, thereby, establishing height dimensions of the flanges of the unit;
- two pairs of laterally-spaced vertically-oriented plates, each pair of plates extending between corresponding vertical legs of associated longitudinally-spaced assemblies of each of said pairs of assemblies;
- the spacing between said plates in each of said pairs of plates establishing a lateral dimension of the flanges of the unit;
- each of said plates having a top edge;
- means removably mounting said plates on said corner assemblies;
- inserts, comprising longitudinally-extending base plates, and blocks formed on said base plates interspersed by voids, positioned longitudinally between each of said corresponding vertical legs and between each of said pairs of plates, for forming complementary block and void patterns on the juncture edges of the unit;
- and
- retainers, removably located over the top edges of each of said pairs of plates and respectively including tongue forming means and groove forming means for forming corresponding tongue and groove portions on the extremities of the flanges of the unit.
Dependencies are inferred from the claim text.