CONCRETE CUTTER

Abstract

An improved concrete cutter has a longitudinally-extending primary boom and one or more saw carriage sub-assemblies that move along the length of the boom. “Wing-like” boom extensions are hingedly secured at each end of the primary boom. The boom extensions can be easily positioned at each end of the primary boom to extend the cutting width of the concrete cutter and without requiring removal of the boom extensions from the concrete cutter. The saw carriage sub-assemblies are independently movable along the boom extensions. Carriage spacing is variably-adjustable along the boom such that each saw carriage can move toward or away from the other saw carriage. Each saw carriage sub-assembly is height-variable and is self-adjusting to contours in the profile of the concrete surface being cut.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front, top and right side perspective view of a preferred embodiment of the improved concrete cutter constructed in accordance with the present invention and showing the boom extensions and carriage sub-assemblies in the “up” or “non-cutting” positions.

FIG. 2 is a front elevational view of the improved concrete cutter shown in FIG. 1 and showing the boom extensions and the carriage sub-assemblies each moved to the “down” or “cutting” positions.

FIG. 3 is an enlarged front elevational view of the right-sided portion of the boom and carriage sub-assembly of the improved concrete cutter that is shown in FIGS. 1 and 2.

FIG. 4 is a further enlarged left side and partially-sectioned elevational view taken along line 4-4 of FIG. 3 and illustrating the details of the carriage sub-assembly that is movable along the boom extension shown.

FIG. 5 is a top, front and left side perspective view of the carriage sub-assembly shown in FIG. 4.

Claims

1. An improved concrete cutter comprising a chassis that is movable upon a concrete surface,an operator seat,operator control means, such control means being used by the operator to move the chassis along a cutting surface,a primary boom,a pair of secondary booms,means for placing said secondary booms in longitudinal alignment with said primary boom,at least one concrete cutting sub-assembly having a concrete cutting blade,means for moving the at least one concrete-cutting sub-assembly along the primary boom and the secondary booms.

2. The improved concrete cutter of claim 1 further comprising a pair of tertiary booms and means for placing said tertiary booms in longitudinal alignment with said pair of secondary booms and said primary boom.

3. The improved concrete cutter of claim 1 wherein said secondary boom placement means comprising a hinge disposed between the primary boom and each of the secondary booms and means for rotating said secondary booms about each hinge.

4. The improved concrete cutter of claim 1 wherein the control means comprises means for controlling that longitudinal movement of the at least one concrete cutting sub-assembly along the primary boom and each of the secondary booms.

5. The improved concrete cutter of claim 1 further comprising means for adjusting the depth of cut made by the concrete cutting blade.

6. An improved concrete cutter comprising a chassis that is selectively movable along a concrete surface,an operator seat,operator control means, such control means being used by the operator to move the chassis along the concrete surface,a primary boom,a pair of secondary booms,means for placing said secondary booms in longitudinal alignment with said primary boom,a pair of tertiary booms,means for placing said tertiary booms in longitudinal alignment with said secondary booms and said primary boom,a pair of concrete cutting sub-assemblies, each concrete cutting sub-assembly comprising a concrete cutting blade, andmeans for selectively moving the pair of concrete-cutting sub-assemblies along the primary boom, the secondary booms and the tertiary booms.

7. The improved concrete cutter of claim 6 wherein said secondary boom placement means comprises a hinge disposed between the primary boom and each of the secondary booms and means for rotating said secondary booms upwardly and downwardly about each hinge.

8. The improved concrete cutter of claim 6 wherein the control means comprises means for selectively controlling the longitudinal movement of the concrete cutting sub-assemblies along the primary boom and each of the secondary booms.

9. The improved concrete cutter of claim 8 wherein the control means further comprises means for independently controlling the longitudinal movement of each concrete cutting sub-assembly.

10. The improved concrete cutter of claim 1 further comprising means for adjusting the depth of cut made by the concrete cutting blade.