B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 7/00 (2006.01) B28B 23/00 (2006.01) E04G 11/06 (2006.01)
Patent
CA 2342418
A hole former assembly used to form a reusable hole former assembly used during the construction of a manhole base. The hole former assembly of the present invention aligns the center of the formed hole in the concrete manhole base sidewall with the center of an inlet or outlet opening of a canal bed liner embedded in the base of the manhole. The hole former assembly is suitable for use in either wet casting or dry casting the base of the manhole with the inlet and/or outlet of the invert embedded in a sidewall of the base of the manhole. Several of the component parts of the hole former assembly of the present invention may be molded as a single unit and thereafter separated, thereby reducing certain manufacturing costs of the component parts.
Ridout & Maybee Llp
Royal Concrete Pipe Inc.
Royal Environmental Systems Inc.
LandOfFree
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