Mold for producing depressions in the sides of a molded block

Details Mold for producing depressions in the sides of a molded block Mold for producing depressions in the sides of a molded block

2005-01-18

2005-01-18

Walker, W. L. (Department: 1722)

Static molds

Mold including core and means to remove core

C249S064000, C249S176000, C425S468000

Reexamination Certificate

active

06843461

ABSTRACT:
The side walls of a mold have recesses in each of which is mounted a mold core for forming depressions on the outer side of a concrete block which is to be produced in this mold. The mold cores are pivotally supported around a horizontal axis which is parallel to the mold walls on the outer side of the mold. A sloping cam slot on each mold core is used to pivot the mold cores into the mold cavity defined by the mold walls and then back into the recess. The inner edges of a recess closely fit the mold core and function as strippers which self-clean all surfaces of the mold core which have come into contact with the concrete when the mold core is pivoted back into its recess. As a result, time intervals for cleaning the mold cores are greatly lengthened and a clean and smooth surface of the finished concrete block is insured.

REFERENCES:
patent: RE17020 (1928-07-01), Healy
patent: 2050299 (1936-08-01), Evers
patent: 3731899 (1973-05-01), Nuzzo
patent: 4627764 (1986-12-01), Scheiwiller
patent: 4761095 (1988-08-01), Barlechner
patent: 5409325 (1995-04-01), Wu
patent: 5902069 (1999-05-01), Barth et al.
patent: 6079902 (2000-06-01), Pettee, Jr.
patent: D431305 (2000-09-01), Barth et al.
patent: 20030007834 (2003-01-01), Bolduc et al.

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