Claims
- 1. A block and tackle system comprising:a. a stationary block housing having, in combination, at least one pulley or sheave-like element and means for gripping a rope such that said rope feeds unidirectionally through said pulleys, b. a moving block housing having, in combination, at least one pulley or sheave-like element and means for gripping a rope such that by raising the housing, a load attached to said rope is also raised, whereby the combination of said pulleys in both of the block housings afford a mechanical advantage in moving said load, and whereby the combination of gripping means hold said load without slippage, and whereby the combination of gripping means allow an operator to reset the distance between the block housings, thus moving said load with a limited amount of rope.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of Provisional Patent Application Ser. No. 60/253,005 filed Nov. 27, 2000.
US Referenced Citations (21)
Provisional Applications (1)
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Number |
Date |
Country |
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60/253005 |
Nov 2000 |
US |