Compound fluted mold for casting prestressed concrete lamp poles

Details Compound fluted mold for casting prestressed concrete lamp poles Compound fluted mold for casting prestressed concrete lamp poles

1991-04-10

1993-01-12

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold including tamping means or means utilizing mold...

Means to rotate female mold about horizontal axis

249 48, 249154, 249163, 249168, 264311, B28B 2130

Patent

active

051788870

ABSTRACT:
A compound fluted mold segment for casting prestressed concrete lamp poles includes three 120.degree. circumferential sectors wherein each sector contains a mold form made of a thin gauge sheet metal in which are locaed flutes formed by a press-brake operation. A plurality of circumferential flanges are welded on the outside of the sheet meal for stiffening the mold form. Longitudinal gates extend radially outwardly from each edge of the circumferential sectors for connecting the sectors and stiffening the mold segment in a longitudinal direction. Mating annular shoulders are incorporated to maintain concentricity between the fluted mold segment and additional mold segments attached at the ends of the fluted segment.

REFERENCES:
patent: 840637 (1907-01-01), Locher
patent: 1199095 (1916-09-01), Meister
patent: 1224584 (1917-05-01), Vogan
patent: 1250956 (1917-12-01), Bratter
patent: 1299739 (1919-04-01), Landwehr
patent: 1398412 (1921-11-01), Barkchat
patent: 2754563 (1956-07-01), Hartenstein
patent: 3144699 (1964-08-01), Williams
patent: 3741707 (1973-06-01), Baumann et al.
patent: 3778215 (1973-12-01), Starr et al.
patent: 4887789 (1989-12-01), Harris et al.

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