초록 ▼

A floating screed device has a first section for cutting through plastic concrete and a second section for floating on the plastic concrete. The two sections are pivotally coupled for rotational movement about a pivot point. Elevation of the second section is measured and used to rotate the first se

A floating screed device has a first section for cutting through plastic concrete and a second section for floating on the plastic concrete. The two sections are pivotally coupled for rotational movement about a pivot point. Elevation of the second section is measured and used to rotate the first section as the floating screed device is moved through a volume of the plastic concrete that is unfinished. As a result, the second section pitches to follow the first section.

대표청구항 ▼

What is claimed as new and desired to be secured by Letters Patent of the United States is: 1. A floating screed device, comprising:a first section defining a leading edge for cutting through plastic concrete;a second section having a planar bottom for floating on the plastic concrete;a pivot coupli

What is claimed as new and desired to be secured by Letters Patent of the United States is: 1. A floating screed device, comprising:a first section defining a leading edge for cutting through plastic concrete;a second section having a planar bottom for floating on the plastic concrete;a pivot coupling a longitudinal end of said first section to a single location on said second section wherein said first section can move rotationally about said pivot in a plane of rotation defined relative to said second section and substantially perpendicular to said planar bottom of said second section;elevation determining means coupled to said second section for determining elevation of said second section relative to a datum; andmeans coupled to said first section and said second section for supporting said first section relative to said second section and for causing said first section to move rotationally about said pivot by an amount based on said elevation so-determined as said floating screed device is moved through a volume of the plastic concrete that is unfinished with said leading edge defining an initial contact edge between said floating screed device and the volume of the plastic concrete that is unfinished.