Implements or apparatus for applying pushing or pulling force – Screw – Special engaging feature
Patent
1997-07-11
1998-12-08
Eley, Timothy V.
Implements or apparatus for applying pushing or pulling force
Screw
Special engaging feature
B66F 336
Patent
active
058458921
ABSTRACT:
A pushing apparatus for pushing a wall form assembly that is provided with roller assemblies includes an upright tubular seat that confines an axial hole therethrough. A rotary shaft is disposed rotatably in the axial hole and has a lower end that extends out of the tubular seat and that has a base plate mounted securely thereon. A foot unit includes a pivot plate disposed below and mounted pivotally to the base plate, and an inclined support which inclines downwardly from the pivot plate and which has a lower end portion that contacts the floor. The foot unit further includes a spring member interposed between the base plate and the inclined support. The operating member includes a threaded shank which extends threadedly into the axial hole via the internally threaded top section and which is coupled rotatably to an upper end of the shaft. When the threaded shank is rotated so as to extend a longer length of the shaft out of the tubular seat, the foot unit is forced toward the floor against action of the spring member and pivots so as to generate a pushing force that is applied by the tubular seat on the wall form assembly to facilitate adjustment of the position of the wall form assembly on the floor.
REFERENCES:
patent: 2503388 (1950-04-01), Hedlund
patent: 5544852 (1996-08-01), Lee
Eley Timothy V.
Halpern Benjamin M.
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