Material-leveling apparatus
AssigneeLindley Incorporated
InventorsJoseph Lindley, Thomas R. Lindley
Life of this patent
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Abstract
A concrete striking equipment presented in the form of a framework mounted on a longitudinal bar operating in a vibratory relationship in a horizontal plane because of an off-center rotating weight defining a part of the powering means. While basically developed for striking concrete, the invention's field of utility extends to the leveling and/or grading of earth and rock.
Claims21
In a portable screed including a frame, a mounting bracket appended to the frame, material-leveling apparatus coupled to the mounting bracket, means for rotating an off-center weight relative to the frame about a vertical axis to impart horizontal vibration to the material-leveling apparatus, the improvement comprising the material-leveling apparatus including
- a straight edge having a vertical leading edge, a vertical trailing edge, and a horizontal base portion situated therebetween, and means for attaching the vertical leading edge to the mounting bracket so that the straight edge is coupled to the frame, the horizonal base portion interconnecting the leading and trailing edges to define a channel extending along the length of the straight edge, and
- means for rigidifying the straight edge to reduce the likelihood of occurrence of stress cracking in the straight edge caused by rotation of the off-center weight, the rigidifying means including at least one vertical plate and means for coupling the at least one vertical plate to the vertical trailing edge of the straight edge.
In a portable screed including a frame, a mounting bracket appended to the frame, a material-leveling apparatus coupled to the mounting bracket, means for rotating an off-center weight relative to the frame about a vertical axis to impart horizontal vibration to the material-leveling apparatus, the improvement comprising the material-leveling apparatus including
- a straight edge having a vertical leading edge including means for receiving the mounting bracket so that the frame is coupled to the straight edge, a vertical trailing edge, and a horizontal base portion situated therebetween, the horizontal base portion interconnecting the leading and trailing edges to define a channel extending along the length of the straight edge, and
- means for rigidifying the straight edge to reduce the likelihood of occurrence of stress cracking in the straight edge caused by rotation of the off-center weight, the rigidifying means including at least one vertical plate and means for coupling the at least one vertical plate to the vertical trailing edge of the straight edge, the rigidifying means being positioned in the channel and coupled to the leading and trailing edges, the rigidifying means including a bracket having a bottom edge positioned to abut the horizontal base portion.
In a portable screed including a frame, a mounting bracket appended to the frame a material-leveling apparatus coupled to the mounting bracket, means for rotating an off-center weight relative to the frame about a vertical axis to impart horizontal vibration to the material-leveling apparatus, the improvement comprising the material-leveling apparatus including
- a straight edge having a vertical leading edge including means for receiving the mounting bracket the frame is coupled to the straight edge a vertical trailing edge, and a horizontal base portion situated therebetween, the horizontal base portion interconnecting the leading and trailing edges to define a channel extending along the length of the straight edge, and
- means for rigidifying the straight edge to reduce the likelihood of occurrence of stress cracking in the straight edge caused by rotation of the off-center weight, the rigidifying means including at least one vertical and means for coupling the at least one vertical plate to the vertical trailing edge of the straight edge, the rigidifying means being positioned in the channel and coupled to the leading and trailing edges, the rigidifying means including a bracket having a plurality of bracket portions, a first bracket portion being coupled to the leading edge, a second bracket portion being coupled to the trailing edge, and a third bracket portion being coupled to, and extending between, the first and third bracket portions, and the second bracket portion including the at least one vertical plate.
In a portable screed including a frame, a mounting bracket appended to the frame, a material-leveling apparatus coupled to the mounting bracket, means for rotating an off-center weight relative to the frame about a vertical axis to impart horizontal vibration to the material-leveling apparatus, the improvement comprising the material-leveling apparatus including
- a straight edge having a vertical leading edge including means for receiving the mounting bracket so that the frame is coupled to the straight edge, a vertical trailing edge, and a horizontal base portion situated therebetween, the horizontal base portion interconnecting the leading and trailing edges to define a channel extending along the length of the straight edge, and
- means for riqidifying the straight edge to reduce the likelihood of occurrence Of stress cracking in the straight edge caused by rotation of the off-center weight, the rigidifying means including at least one vertical plate and means for coupling the at least one vertical plate to the vertical trailing edge of the straight edge, a bracket being positioned in the channel and coupled to the trailing edge at the at least one vertical plate.
A screen comprising
- a frame,
- a rotatable off-center weight,
- means coupled to the frame for rotating the off-center weight about a vertical axis to produce vibration,
- material-leveling means for leveling a material in process, the material-leveling means being movable in a horizontal plane in response to exposure to vibration produced by rotation of the off-center weight about the vertical axis,
- means for rigidifying the material-leveling means to reduce the occurrence of stress cracking caused by the rotation of the off-center weight about the vertical axis, and
- means for coupling the material-leveling means to the frame, the coupling means being separate from the rigidifying means and engaging the material-leveling means and the frame.
A screed comprising
- a frame,
- a rotatable off-center-weight,
- means coupled to the frame for rotating the off-center weight about a vertical axis to produce vibration,
- material-leveling means coupled to the frame for leveling a material in process, the material-leveling means being movable in a horizontal plate in response to exposure to vibration produced by rotation of the off-center weight about the vertical axis, and
- means for rigidifying the material-leveling means to reduce the occurrence of stress cracking caused by rotation of the off-center weight about the vertical axis, the material-leveling means including a material-engaging portion having a horizontal base portion and a leading edge and the rigidifying means including a vertical trailing edge extending upwardly from the horizontal base portion, the leading and trailing edges cooperating with the horizonal base portion to define a longitudinally extending channel and the rigidifying means including a pair of brackets positioned in the horizontal longitudinally extending channel and each bracket being coupled to the vertical trailing edge.
An apparatus for use in leveling fluid materials, the apparatus comprising
- a frame,
- a rotating off-center weight,
- motor means for rotating the off-center weight, the motor means being coupled to the frame,
- a straight edge coupled to the frame, wherein the straight edge includes a vertical leading edge, a horizontal base portion, and a vertical trailing edge, the leading and trailing edges extending upwardly at right angles from the horizontal base portion to define a U-shaped channel in the straight edge,
- means for coupling the off-center weight to the motor means to rotate the off-center weight about a vertical axis so as to impart horizontal vibrating movement to the straight edge, and
- means in the U-shaped channel for rigidifying the straight edge portion to reduce the likelihood of stress cracks caused by vibration generated by the rotation of the off-center weight about the vertical axis, the rigidifying means including at least one bracket positioned in the U-shaped channel and coupled to the vertical trailing edge.
An apparatus for use in leveling fluid materials, the apparatus comprising
- a frame
- a rotating off-center weight,
- motor means for rotating the off-center weight, the motor means being coupled to the frame,
- a straight edge coupled to the frame, wherein the straight edge includes a vertical edge, a horizontal base portion, and a vertical trailing edge, the leading and trailing edges extending upwardly at right angles from the horizontal base portion,
- means for coupling the off-center weight to the motor means to rotate the off-center weight about a vertical axis so as to impart horizontal vibrating movement to the straight edge, and
- means for rigidifying the straight edge portion to reduce the likelihood of stress cracks caused by vibration generated by the rotation of the off-center weight about the vertical axis, the rigidifying means including a bracket having a plurality of vertical portions and at least one of the vertical portions of the bracket is coupled to the vertical trailing edge.
Dependencies are inferred from the claim text.