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US 2012/0056140 A1Published application
Concrete sidewalk slab lifter
OwnerLavonne O'Gwynninventor
Life of this patent
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Abstract
A concrete sidewalk section raising apparatus is provided for pivoti-lifting one side thereof to permit leveling of the ground beneath without the necessity of destroying the concrete section, and to permit it to be lowered intact once the underlying ground is properly leveled. An A-frame support stand supports a motorized winch and cable to raise one side to about 45° from the vertical.
Claims7
Apparatus for pivot-lifting a concrete slab to a position at least 45° above horizontal, comprising:
- A removable slab bracket adapted to fit around one edge of a concrete sidewalk section, having an aperture for engaging a lifting element;
- A lifting element including a cable member with an attached grasping member for removably attaching the cable to the slab bracket;
- A pulling element having a mechanical advantage of at least 4:1, connectable to said lifting element;
- A support stand comprised of a pair of legs in an A-frame configuration capable of supporting the lifting element and the pulling element while raising one side of a concrete sidewalk section
1 more element
An apparatus for pivot-lifting of one side of a section of concrete sidewalk, comprising
- a slab bracket for removably engaging the side to be lifted, the bracket including an aperture;
- a cable element with grasping hook for engaging said aperture;
- a motorized winch for winding said cable element;
- an A-framed support stand comprised of a pair of legs configured to straddle the concrete sidewalk section to be raised, and supporting said winch on any one of a plurality of winch holders spaced along one leg of the stand and above said sidewalk section, said legs having upper and lower ends, pivotably connected at their upper ends with a fastener-set of elements including a removable pin to hold the legs in their A-framed configuration.
1 more element
Dependencies are inferred from the claim text.