Wedge-type jack apparatus for raising structure while sustaining

Details Wedge-type jack apparatus for raising structure while sustaining Wedge-type jack apparatus for raising structure while sustaining

1989-06-22

1990-07-31

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Wedge

B24B 4106

Patent

active

049444921

ABSTRACT:
The present invention relates to a method of raising a structure while sustaining very large pressure due to same and then tmeporarily supporting the structure, and a wedge-type jack apparatus for use in the method. The wedge-type jack apparatus comprises a wedge-like drive member, an upper member and a lower member, these three members being disposed in a frame body such that the drive member is sandwiched between the upper and lower members in a laminated manner. A slide plate rests on the upper member. When the wedge-like drive member is pushed in a lengthwise direction, the upper member and the wedge-like drive member are moved up to raise the structure overlying the slide plate, while keeping the current condition unchanged. Upon the structure being raised up to a desired level, this level is maintained by stopper means which restricts movement of the wedge-like drive member. Thus, the wedge-type jack apparatus supports the structure while transmitting the load of the structure to a substructure.

REFERENCES:
patent: 2327297 (1943-08-01), Woodruff
patent: 3390862 (1968-07-01), Schrepfer
patent: 3774352 (1973-11-01), Weber
patent: 4053255 (1977-10-01), Taylor
patent: 4184665 (1980-01-01), Queen
patent: 4559986 (1985-12-01), Svensson et al.

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