Tilting screed

Details Tilting screed Tilting screed

2006-01-03

2006-01-03

Hartmann, Gary S. (Department: 3671)

Road structure, process, or apparatus

Apparatus

Means to agitate material

C404S118000

Reexamination Certificate

active

06981819

ABSTRACT:
A screed plate includes a pair of handles mounted to a pivot member. The pivot member is connected for rotation with respect to a screed plate about a horizontal axis with respect to a screed plate. The vibrator is provided on the screed plate and a tilt actuator is connected to the pivot member and to the screed plate for causing tilting of the screed plate. A laser receiver receives a horizontal laser beam and determines whether or not the receiver is above, below, or at the same level as the laser beam. If the receiver is either above or below the laser beam it sends a signal to the tilt actuator to cause tilting of the screed plate.

REFERENCES:
patent: 4520527 (1985-06-01), Maggio et al.
patent: 4838730 (1989-06-01), Owens
patent: 4856932 (1989-08-01), Kraft
patent: 6089787 (2000-07-01), Allen et al.
patent: 6227750 (2001-05-01), Maggio et al.
patent: 6374569 (2002-04-01), Suckow

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