Transformable two-person floating screed with automatic grade co

Details Transformable two-person floating screed with automatic grade co Transformable two-person floating screed with automatic grade co

1998-05-26

2000-07-18

Lillis, Eileen Dunn

Road structure, process, or apparatus

Apparatus

Screed or drag

E01C 1922

Patent

active

060897872

ABSTRACT:
A two-person floating screed with laser-operated, automatic grade control apparatus for finishing plastic concrete is transformable for different operations. A rigid, transversely oriented float mounts a strikeoff for initially contacting and leveling rough, freshly poured concrete. In one form of the invention the screed merely floats upon the concrete surface. In an alternative embodiment, lightweight ski assemblies support the screed over the subgrade. The skis secure upwardly projecting screw jacks that removably couple to the screed and control elevation of the transverse float in response to laser signals. Each worker has a separate handle mechanism pivotally associated with the float. Separate, light-weight power sources are carried by each worker in a suitable backpack to power the screw jacks. Laser sensors mounted on vibration dampened stanchions emanating from the float respond to external laser beacons and display grade information so that the workers can make manual adjustments. With the ski assemblies attached, the laser system automatically controls float elevation by activating the screw jacks so that the extend or contract. The float preferably comprises twin sections that are secured together in the two person mode. When uncoupled, the float divides into a pair of separate, compact one-person floating screeds.

REFERENCES:
patent: 2599330 (1952-06-01), Jackson
patent: 4386901 (1983-06-01), Morrison
patent: 4591291 (1986-05-01), Owens
patent: 4752156 (1988-06-01), Owens
patent: 4798494 (1989-01-01), Allen
patent: 4838730 (1989-06-01), Owens
patent: 5130794 (1992-07-01), Ritchey
patent: 5190401 (1993-03-01), Wilson
patent: 5288166 (1994-02-01), Allen et al.
patent: 5429494 (1995-07-01), Kuehn
patent: 5549413 (1996-08-01), Bolden
patent: 5567075 (1996-10-01), Allen

Affiliated with

Also associated with

Rating

Transformable two-person floating screed with automatic grade co does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transformable two-person floating screed with automatic grade co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transformable two-person floating screed with automatic grade co will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2030034