Concrete pressure monitoring device for monolithic concrete stru

Details Concrete pressure monitoring device for monolithic concrete stru Concrete pressure monitoring device for monolithic concrete stru

1979-05-03

1982-04-13

Parrish, John A.

Plastic article or earthenware shaping or treating: apparatus

Utilizing subterranean feature as shaping means

425 63, 425140, 425149, 425170, B28C 716

Patent

active

043245390

ABSTRACT:
A concrete pressure monitoring device in an apparatus for continuously forming an elongated monolithic concrete structure within a prepared excavation. The device includes a pressure sensitive membrane exposed to wet concrete between a bottom surface of the excavation and an inner form member of the apparatus. The membrane covers an open end of a fluid filled housing so that variations in concrete pressure adjacent the membrane will flex the membrane to cause displacement of fluid within the housing. A remote indicator responsive to displacement of fluid within the housing is operatively connected to the housing to indicate the concrete pressure variations.

REFERENCES:
patent: 2969576 (1961-01-01), Fuller
patent: 3032852 (1962-05-01), Hanson
patent: 3049783 (1962-08-01), Hanson
patent: 3083433 (1963-04-01), Tiller
patent: 3475800 (1969-11-01), Jones
patent: 3792942 (1974-02-01), Cole
patent: 4131596 (1978-12-01), Allen

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