Material conveying equipment with control for paving materials u

Details Material conveying equipment with control for paving materials u Material conveying equipment with control for paving materials u

1987-02-17

1989-04-18

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Control

377 16, 377 17, 404 84, 1985022, 340612, 367 99, E01C 1948

Patent

active

048233668

ABSTRACT:
A sensing arrangement for sensing the level of a bulk material, such as the paving material fed by a paving machine, comprises an ultrasonic transducer spaced from the paving material for controlling the feed of material.

REFERENCES:
patent: 3554291 (1971-01-01), Rogers
patent: 3594648 (1971-07-01), Rapraport
patent: 3889796 (1975-06-01), Bailey et al.
patent: 3976989 (1976-08-01), Smith
patent: 4012160 (1977-03-01), Parker
patent: 4052676 (1977-10-01), Crittenden
patent: 4065856 (1978-01-01), Waters
patent: 4189133 (1980-02-01), Arrasmith et al.
patent: 4698634 (1987-10-01), Alongi et al.
patent: 4750584 (1988-06-01), Tanaka et al.

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