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Long travel beam jack
   
Document Number
US Patent 4757975
Issued Date
July 19, 1988
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Abstract
A jack for supporting a ceiling beam is provided and consists of a pair of vertical sliding support members operated by a winch mechanism with cable which allows one person to set the beam. The jack will lift heavy loads eliminating the need for a crane and more manpower. In a modification the winch handle can be operated by a foot lever on base of the jack.
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Long travel beam jack - US Patent 4757975 Drawing
Drawing from US Patent 4757975
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Number of Claims:
1
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Published
July 19, 1988
Application Number
07/055,192
Filed
May 28, 1987
US Classification
254/133A   254/387
Int'l Classification
B66D   3/00   (20060101)   B66D   3/04   (20060101)   B66F   3/00   (20060101)   E04G   21/16   (20060101)   E04F   21/18   (20060101)   E04G   25/00   (20060101)   E04G   25/04   (20060101)  
USPTO Field of Search
254/387   254/133A   254/134   254/45   254/46   254/47   254/48   254/4R   254/4B   254/4C   254/108   254/426   254/DIG.4   269/158   414/10   414/11  
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