Laser-guided portable screed

Details Laser-guided portable screed Laser-guided portable screed

1987-01-27

1988-06-21

Massie, Jerome

Road structure, process, or apparatus

Apparatus

Screed or drag

404120, E01C 1935

Patent

active

047521562

ABSTRACT:
A system for facilitating leveling of a screed as the screed is being drawn across freshly-poured concrete. The system includes a stationary signal transmitter which is separate from the screed and which generates a planar leveling signal. Mounted on the screed are a pair of leveling signal sensors, each of the sensors being equipped for generating an indication of the level of the screed after receipt of the leveling signal. The sensor are adjustably situated on the screed for proper adjustment and orientation toward the transmitter.

REFERENCES:
patent: 2796685 (1957-06-01), Bensinger
patent: 3069983 (1962-12-01), Pizzarotti et al.
patent: 3953145 (1976-04-01), Teach
patent: 4371287 (1983-02-01), Johanssen
patent: 4386901 (1983-06-01), Morrison
patent: 4665633 (1987-04-01), Somero et al.

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