초록 ▼

A laser controlled automatic grade control system for finishing plastic concrete mounts the finishing tool behind the support towers to resist furrowing. The system functions with a variety of elongated, multi-section concrete finishing tools such as triangular truss screeds or the like, all of whic

A laser controlled automatic grade control system for finishing plastic concrete mounts the finishing tool behind the support towers to resist furrowing. The system functions with a variety of elongated, multi-section concrete finishing tools such as triangular truss screeds or the like, all of which can be quick connected or disconnected from the tower system. Skis that support the device facilitate sliding, winch-driven movement over and through plastic concrete. Spaced apart, vertically upwardly extending towers support the device along the length of the finishing tool. The towers are cylinder-adjustable in length. Cylinder extension and retraction are governed by a sensor-controlled system that is laser operated. The sensors respond to a preestablished laser beacon to control finishing tool elevation as the device traverses the pour in response to its winches.

대표청구항 ▼

An offset laser-operated, automatic grade control screed for treating plastic concrete, said screed having a direction of screed travel and comprising: an elongated concrete finishing mechanism adapted to be deployed in physical contact with said concrete, said finishing mechanism comprising strike-

An offset laser-operated, automatic grade control screed for treating plastic concrete, said screed having a direction of screed travel and comprising: an elongated concrete finishing mechanism adapted to be deployed in physical contact with said concrete, said finishing mechanism comprising strike-off means for cutting, striking off and leveling rough, freshly poured concrete and vibrator means for vibrating said finishing mechanism and said concrete to smooth and settle the concrete; vertical tower means for controlling the finishing mechanism, said tower means adapted to vary in height to control an orientation and elevation of the finishing mechanism, and said tower means comprising a front facing the direction of screed travel and a rear; stanchion means for extending or and contracting said tower means; control means for controlling the extending and contracting of said tower means in response to laser means; ski means for being disposed upon a floor or upon a subgrade for supporting the tower means and enabling the screed to be drawn through freshly poured concrete in the direction of screed travel; and, means for dynamically mounting said finishing mechanism to said tower means rear wherein furrows caused by movement of the rear of the tower means through the concrete are finished.