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US 4,842,241 AGranted
Lightweight plastic concrete mold
AssigneeDeslauriers, Inc.
InventorsJohn M. Fitzgerald, Gary L. Workman
Life of this patent
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AssigneeDeslauriers, Inc.
InventorsJohn M. Fitzgerald, Gary L. Workman
Estimating the term…
A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.
A lightweight beam mold having a bottom and side walls formed froma single panel of rigid plastic and with the side walls hinged to the bottom for movement between beam-forming and beam-release positions by integral hinge elements defined by elongate sections of the panel extending for the full length of the panel between the bottom and side walls and which are of sufficiently reduced thickness to be flexible, a pair of separate end walls each having a generally U-shaped channel removably attachable one to each end of the bottom and side walls when in beam-forming position, and said panel having at least one smooth surface to have smooth interior surfaces for the bottom and side walls and locking means to lock the end walls to the bottom and side walls.
A mold for forming concrete test specimens and having a bottom, a pair of side walls and a pair of end walls each having a generally U-shaped channel to receive an end of a bottom and one end of each side wall in watertight relation, the improvement comprising;
A lightweight beam mold for forming a concrete test specimen and having a bottom, a pair of side walls and a pair of end walls, said bottom and side walls being integrally formed from a panel of rigid plastic, means for hingedly connecting said side walls for pivoting relative to said bottom comprising two elongate full-length sections of said panel of reduced thickness to be flexible and defining a separation between the bottom and the side walls, and said end walls each having a generally U-shaped channel to receive an end of each of said bottom and the pair of side walls, the U-shaped channel having a cross section to tightly engage said ends and effect a watertight seal and locking means to maintain said seal.
Dependencies are inferred from the claim text.