Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1989-03-24
1990-01-09
Taylor, Dennis L.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
249 11, 425 64, 405150, E21D 1100
Patent
active
048924415
ABSTRACT:
This invention is both an apparatus and a method for distributing concrete coming from a concrete pump to anyone of a plurality of points of use. An intermediate conduit is connected with a main supply conduit and the intermediate conduit comprises a plurality of branch points connected in series by the intermediate conduit. At each branch point a short branch pipe is connected with the intermediate conduit. All branch pipes can be completely plugged by rubber plugs. A discharge conduit is connected with the end of the intermediate conduit and a draining device can be operatively connected with the discharge conduit to force a deformable plug through the intermediate conduit and at least a part of the supply conduit in order to drain and cleanse the whole system before setting of the concrete will begin. The draining process is activated at the end of a working day or working period and can be automatically started after a predetermined stop period of the concrete pump.
REFERENCES:
patent: 4147453 (1979-04-01), Unger et al.
patent: 4687374 (1987-08-01), Babenderescle et al.
Messrs. Stetter GmbH, Dr. Karl-Lenz-Str.
Olsen Arlen L.
Taylor Dennis L.
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