Patent
Concrete-leveling system
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TLDR
In this article, a leveling system for freshly poured concrete is provided comprising a hand screed and a hand float, which includes a laser beam leveling system consisting of a laser transmitter and a laser receiver.Abstract:
A leveling system for freshly poured concrete is provided comprising a hand screed and a hand float. The system includes a laser beam leveling system consisting of a laser transmitter mounted on the hand screed and a laser beam receiver target mounted on the hand float. The hand screed further includes an inclinometer mounted on top of the hand screed for maintaining the angle of the screed when the screed is used on sloped surfaces. Bubble levelers positioned on top of the hand screed and the hand float are used to maintain the hand screed and the hand float in a level position.read more
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Patent
Obergfoll concrete screed level
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Patent
Transformable two-person floating screed with automatic grade control
J. Dewayne Allen,Timmy D. Guinn +1 more
TL;DR: In this paper, a two-person floating screed with laser-operated, automatic grade control apparatus for finishing plastic concrete is transformable for different operations, such as contacting and leveling rough, freshly poured concrete.
Patent
Laser operated automatic grade control system for concrete finishing
TL;DR: In this paper, an automatic grading control device for finishing plastic concrete is presented, which can control several different elongated, multi-section concrete finishing tools such as vibratory screeds or the like, with or without forms.
Patent
Portable screed guidance system
TL;DR: In this article, a guidance system for providing control over the height and inclination of a portable screed is presented, which includes an inclination measuring device for measuring an inclination, an inclination display for displaying the measured inclination to an operator, a level measuring device and a level display for measuring a height relative to a reference signal.
Patent
Laser-guided portable screed
TL;DR: In this article, a system for facilitating the leveling of a screed as the screed is being drawn across freshly-poured concrete is described, which includes a stationary signal transmitter that generates a planar leveling signal.