Implements or apparatus for applying pushing or pulling force – Screw – Special engaging feature
Patent
1987-06-02
1988-08-16
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Screw
Special engaging feature
B66F 1100
Patent
active
047638788
ABSTRACT:
An apparatus and method for jacking basement walls which have moved out of alignment due to pressure from outside the wall. The apparatus includes a brace attached at the bottom by a bracket adjacent the wall to be jacked. The brace is then set vertically against the wall. A telescoping beam is attached to the floor a short distance from the wall, so that the beam is positioned upright, parallel to the brace. In one embodiment the upper end of the beam is extended and attached to the floor joists overhead in the basement. In another embodiment the upper end of the beam is secured to the lower surface on which the wall rests. Any suitable jack assembly is then slidably attached between the beam and the brace. The jack assembly is then positioned at the proper point and used to move the wall back into its proper place. Finally the top of the brace is anchored so as to prevent the wall from moving back out of position. In one embodiment of the invention, the jack assembly includes a screw type jack, having a barrel. A pair of threaded shafts is screwed one into each end of the barrel. The threads on the shafts oppose each other so that turning the barrel, by use of the handles provided, results in the shafts moving apart or together, depending on which direction the barrel is turned. The distal ends of the threaded shafts terminate in ball joint rod ends to which are attached the slidable connectors for connection to the beam and brace.
REFERENCES:
patent: 587274 (1897-07-01), Rue
patent: 737133 (1903-08-01), O'Brien
patent: 2684824 (1954-07-01), Hillberg
patent: 2850254 (1958-09-01), Houseworth
patent: 2885221 (1959-05-01), Weeks
patent: 4453863 (1984-06-01), Sutton et al.
patent: 4472090 (1984-09-01), Krings
patent: 4669704 (1987-06-01), Abraham et al.
Abraham Robert S.
Koehler Dennis L.
Abraham Robert S.
Watson Robert C.
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