Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Clutch actuated
Patent
1979-11-05
1981-01-27
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Step-by-step traveling bar
Clutch actuated
B66F 100
Patent
active
042470838
ABSTRACT:
A wall lifter able to be made to climb a column to lift a prefabricated wall into a predetermined position. The lifter comprises a first sleeve to surround the column. A saddle engages the wall. The saddle extends forwardly of the first sleeve and is mounted on the sleeve. A lever is pivotably mounted on the first sleeve adjacent the saddle. There is a fulcrum point for the first lever. A second sleeve surrounds the column and is disposed above the first sleeve when the lifter is in its useful position. There is a link between the second sleeve and the lever, pivotably connected to both. A resilient member urges the lever upwardly. The lifter is easy to use and to make and relatively cheap.
REFERENCES:
patent: 1270906 (1918-07-01), Whitney
patent: 2217403 (1940-10-01), Gunn
patent: 2849211 (1958-08-01), Shoesmith
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