Block and Tackle Jammer Assembly for Easier Boat Anchor Tightening
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Solution Overview
Problem
Tying a boat to a bladder anchor, especially with larger boats, is difficult due to the challenge of effectively tightening the rope, as pulling the boat towards the anchor can be cumbersome.
Innovation Solution
A pulley system with a block and tackle assembly featuring axially aligned pulleys, a jammer with a channel and dimples to secure the rope, a swivel for 360-degree rotation, and a rope clip with movable teeth to facilitate easy tightening and untangling, along with a mesh bag for alignment indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple rope is used to tie the boat to the anchor, then the device complexity is low, but the ease of operation deteriorates because pulling the boat towards the anchor to tighten the rope is difficult
Solution Approach 1:
The system divides the rope into multiple segments that pass through several pulleys in sequence, creating a block and tackle arrangement. This segmentation allows the force to be distributed and multiplied, enabling easy tightening without physically pulling the entire rope length.
Solution Approach 2:
Pulleys are introduced as intermediary components between the rope and the boat-anchor system. These pulleys change the direction and distribution of force, allowing a person to tighten the rope by pulling on a short segment rather than dragging the entire rope across water.
2Reliability
If the channel is aligned with the pulleys for smooth rope passage, then the ease of operation improves, but reliability deteriorates because the rope may slip out during tightening
Solution Approach 1:
The channel is deliberately misaligned with the pulleys, creating an asymmetric geometry where the rope enters at one angle and exits at another. This asymmetry, combined with the tortuous path, prevents the rope from slipping out while still allowing it to be threaded through during installation.
Solution Approach 2:
The channel creates a tortuous (curved) path for the rope rather than a straight alignment. This curved geometry increases friction and mechanical interlocking, securing the rope in place while maintaining ease of passage during the tightening process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system simplifies the anchoring process by providing mechanical advantage and ensuring proper alignment, allowing for easy and secure attachment of boats to anchors, even with larger vessels.
Implementation Method 1
a block and tackle assembly having a plurality of pulleys and a first rope, wherein a first pulley and a third pulley of the plurality of pulleys are axially aligned with each other and rotatably coupled to a first bracket
Implementation Method 2
a swivel coupled to the first bracket of the block and tackle assembly and to a second rope, the swivel configured to rotate 360 degrees in both a clockwise direction and a counterclockwise direction
Implementation Method 3
a jammer coupled to the first bracket and having a channel misaligned with the first pulley and the third pulley, wherein the channel has two walls each with a plurality of teeth and a dimple extending into the channel between the two walls
Data Source
AI summary
A pulley system for tying a boat to an anchor with a block and tackle assembly and a jammer. The block and tackle assembly has pulleys arranged on a first bracket and a second bracket and a rope strung through each of the pulleys. The jammer is coupled to the first bracket and has a channel and a jammer exit at the end of the channel. The jammer is configured to receive the rope within the channel and pass the rope out of the jammer exit. The channel and the jammer exit are configured to create a tortuous path for the rope through the first bracket. A swivel and a rope clip may be coupled to the block and tackle assembly. The swivel is configured to rotate at least 360 in either direction. The rope clip is configured to allow for quick tightening of the pulley system.