Implements or apparatus for applying pushing or pulling force – Special engaging elements – Sharing props
Patent
1997-07-17
1999-11-09
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Special engaging elements
Sharing props
254134, B66F 1100
Patent
active
059798793
ABSTRACT:
The present application discloses a sidewalk lifting device made of steel framed tower that has a flat plate extending inward from the lowest end of the tower. This plate holds the lower surface of a sidewalk slab and also provides the lifting surface to elevate a damaged sidewalk. Additionally, attached to the inside surface of the tower in a position above the plate, is an adjustable slab brace frame which serves to hold the upper surface of a given sidewalk slab while it is being lifted.
The lifting tower also has on its upper end outward extending frame members. When lifting a damaged sidewalk, multiple lifting devices may be used and supplied with hydraulic bottle jacks which fit on the outside edge of the lifting towers.
A method of leveling sidewalks is also disclosed this method includes lifting a sidewalk slab to be leveled then injecting mason's sand into the cavity created between the lower surface of the sidewalk and the settled earth below it. This procedure is accomplished by the use of a sand blaster and a connected wand which is fed beneath the sidewalk and into the cavity. Once the cavity is completely filled with sand, the user simply removes the present invention completely. The use of sand in filling voids provides a very stable foundation for the sidewalk that will resist settling and prolong the useful life of the sidewalk.
REFERENCES:
patent: 1266958 (1918-05-01), Kiriyama
patent: 2456375 (1948-12-01), Cedarholm
patent: 2469670 (1949-05-01), Thompson
patent: 2548944 (1951-04-01), Chapman
patent: 5131629 (1992-07-01), Hillhouse
patent: 5379987 (1995-01-01), Cleary
Harr Curtis V.
Watson Robert C.
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