Equipment for charging ready-mixed concrete additives batchwise

Details Equipment for charging ready-mixed concrete additives batchwise Equipment for charging ready-mixed concrete additives batchwise

1975-06-04

1976-12-21

Hornsby, Harvey C.

259164, B28C 704, B60P 316

Patent

active

039984370

ABSTRACT:
Equipment for charging ready-mixed concrete additives batchwise, which aims at keeping the slump of ready-mixed concrete within a certain range and making longer transportation by truck mixer possible without degrading the quality. The slump of ready-mixed concrete is detected electrically as a change in the mixing torque so that, when this detected value reaches a value set beforehand, a motor receives a control instruction to charge additives for adjusting slump into the ready-mixed concrete. The operating time of the motor for charging additives and the interval until control operation is reset and may be adjusted with a timer.

REFERENCES:
patent: 2263797 (1941-11-01), Christensen
patent: 2954215 (1960-09-01), Warmkessel
patent: 3447201 (1969-06-01), Seanor et al.
patent: 3727894 (1973-04-01), Ahrenberg
patent: 3825235 (1974-06-01), Schwertfeger et al.

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