Forming element and forming apparatus for casting manhole invert

Details Forming element and forming apparatus for casting manhole invert Forming element and forming apparatus for casting manhole invert

1982-12-22

1984-11-27

Czaja, Donald

Static molds

In situ construction engineering type or building type-mold...

Forming hydraulic and earth control type product in situ

249145, 249151, 249184, E21D 1000

Patent

active

044847246

ABSTRACT:
Apparatus for forming inverts in manhole floors between angularly-related pipeline sections includes a set of a plurality of wedge-shaped forming elements each having a molding surface of corresponding compound longitudinal and transverse arcuate curvature, the forming elements being of respectively varying longitudinally arcuate extents and being adapted for longitudinal end-to-end joinder for producing a variety of angular curvatures. The forming apparatus is set-up in the manhole between the pipeline sections with the molding surface downwardly facing and concrete is poured about the apparatus, the concrete thereby setting in conformity with the apparatus' molding surface to create a curvilinear invert between the pipeline sections.

REFERENCES:
patent: 725098 (1903-04-01), Learned
patent: 1145228 (1915-07-01), Blayney
patent: 1560811 (1925-11-01), DeLa Mare
patent: 4085918 (1978-05-01), Wilkerson
patent: 4278229 (1981-07-01), Burlett
patent: 4314775 (1982-02-01), Johnson
patent: 4318880 (1982-03-01), McIntosh et al.
Mecklenburg Co., North Carolina, Engineering Dpt., "Standard Detail-Storm or Sanitary Sewer Manhole", May 16, 1974.
Charlotte-Mecklenburg Utility Dpt., Charlotte, N.C., Engineering Div., "Standard Detail-Outside Drop Manhole, Pipes 12 Inches and Larger", Aug., 1972.

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