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US 6,601,829 B2Granted
Pulley system with gripping block and tackle for load handling
OwnerBryan Paul Grahaminventor
Life of this patent
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Abstract
An improved block and tackle system comprising a stationary-block housing (10) having attached pulleys (14 & 18) and cam cleat (22), and a moving-block housing (12) with attached pulley (16) and cam cleat (20) Said invention allows a load (8) to be raised, moved, or lowered with a minimal amount of rope (6).
Claims1
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.
2 more elements
Dependencies are inferred from the claim text.