Apparatus and method for subgrade preparation
First Claim
1. A subgrade preparation apparatus for leveling, grading and compacting a subgrade surface for receiving concrete thereon, said subgrade preparation apparatus comprising:
- a base unit positionable on a support surface adjacent to a targeted subgrade area;
a support boom extending from said base unit; and
a subgrade head assembly adjustably mounted on said support boom, said subgrade head assembly being vertically adjustable relative to said support boom to be lowered onto a subgrade surface at the targeted subgrade area, said subgrade head assembly including a framework, a plow and a material moving device for moving material toward at least one side of said subgrade head assembly for establishing the subgrade surface, said plow having a longitudinal axis and an outer end, said subgrade head assembly including a plow end plate pivotally attached at said outer end and pivotable about a generally horizontal pivot axis that is generally transverse to a longitudinal axis of said plow, said plow end plate being pivotable between a raised postion, where said plow end plate is generally horizontally oriented and generally transverse to said longitudinal axis of said plow, and a lowered position, where said plow end plate is generally vertical and is positioned at said outer end of said plow and generally transverse to said longitudinal axis of said plow to form an end portion of said plow to limit plowed material from flowing around said outer end of said plow as said subgrade head assembly is moved over and along the subgrade surface at the targeted subgrade area.
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0 Petitions
Accused Products
Abstract
A subgrade preparation apparatus for preparing a subgrade surface for concrete to be placed thereon includes a base unit positionable on a support surface adjacent to a targeted subgrade area, an extendable boom extending from the base unit, and a subgrade head assembly adjustably mounted on the extendable boom. The subgrade head assembly includes a framework, a plow and a material moving device for moving material toward at least one side of the subgrade head assembly. The subgrade head assembly includes a plow end plate movably attached at an outer end of the plow and movable to a position where the plow end plate is generally vertical and forms an end portion of the plow to limit plowed material from flowing around the outer end of the plow as the subgrade head assembly is moved over and along the subgrade surface at the targeted subgrade area.
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Citations
24 Claims
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1. A subgrade preparation apparatus for leveling, grading and compacting a subgrade surface for receiving concrete thereon, said subgrade preparation apparatus comprising:
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a base unit positionable on a support surface adjacent to a targeted subgrade area; a support boom extending from said base unit; and a subgrade head assembly adjustably mounted on said support boom, said subgrade head assembly being vertically adjustable relative to said support boom to be lowered onto a subgrade surface at the targeted subgrade area, said subgrade head assembly including a framework, a plow and a material moving device for moving material toward at least one side of said subgrade head assembly for establishing the subgrade surface, said plow having a longitudinal axis and an outer end, said subgrade head assembly including a plow end plate pivotally attached at said outer end and pivotable about a generally horizontal pivot axis that is generally transverse to a longitudinal axis of said plow, said plow end plate being pivotable between a raised postion, where said plow end plate is generally horizontally oriented and generally transverse to said longitudinal axis of said plow, and a lowered position, where said plow end plate is generally vertical and is positioned at said outer end of said plow and generally transverse to said longitudinal axis of said plow to form an end portion of said plow to limit plowed material from flowing around said outer end of said plow as said subgrade head assembly is moved over and along the subgrade surface at the targeted subgrade area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for leveling, grading and/or compacting a subgrade surface for receiving concrete on the subgrade, said method comprising:
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providing a subgrade preparation apparatus comprising a base unit positionable on a support surface and a subgrade head assembly having a plow which defines at least one end, said subgrade head assembly including a plow end plate movably mounted at said at least one end of said plow; vertically moving said subgrade head assembly relative to said base unit onto a subgrade area; pivoting said plow end plate about a generally horizontal pivot axis to move said plow end plate from a generally horizontal orientation to a generally vertical orientation along said end of said plow and generally transverse to a longitudinal axis of said plow; generally horizontally moving said subgrade head assembly along the subgrade; establishing the subgrade surface with said plow and a means for moving material to one side of said subgrade head assembly; and limiting movement of plowed material around said end of said plow by said generally vertically oriented plow end plate as said subgrade head assembly is moved over and along the subgrade surface. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A subgrade preparation head assembly configured to adjustably mount to a subgrade preparation apparatus for leveling, grading and compacting a targeted subgrade surface for receiving concrete thereon, said subgrade preparation head assembly comprising:
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a framework; a plow mounted to said framework, said plow having an outer end; a material moving device mounted to said framework, said material moving device being operable to move material toward at least one side of said subgrade head assembly; and a plow end plate pivotally attached at said outer end of said plow and being pivotable about a generally horizontal pivot axis between a raised position, where said plow end plate is generally horizontally oriented, and a lowered position where said plow end plate is generally vertical and is positioned at said outer end of said plow and is generally transverse to the longitudinal direction of the plow so as to form an end portion of said plow to limit plowed material from flowing around said outer end of said plow as said subgrade head assembly is moved over and along the subgrade surface at the targeted subgrade area. - View Dependent Claims (21, 22, 23, 24)
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Specification