Apparatus for the production of a monolithic manhole base

Details Apparatus for the production of a monolithic manhole base Apparatus for the production of a monolithic manhole base

1982-09-20

1985-01-22

Czaja, Donald

Static molds

Container-type molding device

And an inner removable core to form recess or opening

249 66A, 425456, B28B 710

Patent

active

044947240

ABSTRACT:
A manufacturing technique for producing a monolithic concrete base for a manhole, wet well, junction chamber in an upright position that includes a jacket having a removable pallet that forms the bottom wall thereof. A core is suspended inside the jacket upon two sets of horizontally aligned spacer pins. The first set of pins is situated below the level to which the concrete is to be poured while the second set is situated above the pouring level. After the molding unit has been filled to the required level, the upper set of pins is removed and a contoured forming header placed over the top surface of the concrete before it has a chance to set in order to create a joint for receiving another section thereon.

REFERENCES:
patent: 934477 (1909-09-01), Thinnes
patent: 2850785 (1958-09-01), Rushing
patent: 3542327 (1970-11-01), Herzog
patent: 3860214 (1975-01-01), Schmidgall
patent: 3939234 (1976-02-01), Dashew
patent: 4261541 (1981-04-01), Morrow

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