Apparatus for forming frogs in the sides of a concrete element

Details Apparatus for forming frogs in the sides of a concrete element Apparatus for forming frogs in the sides of a concrete element

1987-01-09

1988-10-18

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

264145, 264154, 425 63, 425308, 425385, 425457, B28B 1108, B28B 1112

Patent

active

047783710

ABSTRACT:
An apparatus for forming frogs in the sides of a slipformed concrete element, especially a hollow-core slab is disclosed. In accordance with the invention, the frogs are formed in the sides of the element by removing cast material from the sides by a reciprocative scraping action. The reciprocative movement parallel to the side of the element is effected with a drive motor and a lever assembly. By the method, it is possible to obtain a desired frog shape and depth without damaging the side surfaces.

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