Magnetic hole former

Details Magnetic hole former Magnetic hole former

2007-01-09

2007-01-09

Heckenberg, Donald (Department: 1722)

Static molds

Container-type molding device

And an inner removable core to form recess or opening

C249S177000, C425SDIG033

Reexamination Certificate

active

10772559

ABSTRACT:
An improved method and apparatus for attaching a hole former to a mold assembly for use in the formation of cast materials such as concrete and the like. The apparatus comprises a hole former assembly attached to a bracket. The bracket is held in a stationary position by a magnet assembly that is remotely located from the hole former. The magnet assembly is comprised of a plurality of magnets encased in a metal casing. An expendable blister pack can be provided to fit on the outside of the casing to facilitate removal of the magnetic assembly from the cast member.

REFERENCES:
patent: 3686815 (1972-08-01), Von Bose
patent: 3786386 (1974-01-01), Braillon
patent: 4379277 (1983-04-01), Philibert
patent: 5356534 (1994-10-01), Zimmerman et al.
patent: 6110402 (2000-08-01), Miller
patent: 6196517 (2001-03-01), Westhoff et al.
patent: 6371436 (2002-04-01), Westhoff et al.
patent: 6454686 (2002-09-01), McEachern
patent: 6575424 (2003-06-01), Domizio
patent: 2003/0047664 (2003-03-01), DeFiglio

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