Apparatus for vacuum processing of concrete

Details Apparatus for vacuum processing of concrete Apparatus for vacuum processing of concrete

1976-05-24

1980-05-20

McQuade, John

Plastic article or earthenware shaping or treating: apparatus

With foraminous or absorbent means for removal of vehicle or...

Vacuum means

425445, B28B 1100

Patent

active

042037140

ABSTRACT:
This invention relates to apparatus for vacuum processing concrete for removing surplus water from the concrete by exposing the concrete to vacuum. According to the invention solid particles are prevented from being sucked away from the concrete by applying the vacuum to the concrete surface through a sheet perforated with a great number of holes. The holes are sized to substantially exceed the smallest particles to be prevented from being sucked away by filtering within the concrete.

REFERENCES:
patent: 2046867 (1936-07-01), Billner
patent: 2533263 (1950-12-01), Johnson
patent: 3021254 (1962-02-01), Helversen et al.
patent: 3506747 (1970-04-01), Creskoff
patent: 3514857 (1970-06-01), Rossen
patent: 3600771 (1971-08-01), Dyrander

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