Compact Rope Descender with Auto-Clamping Cam Mechanism
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Solution Overview
Problem
Existing rope descenders are not compact enough for personal use, lack versatility, and do not provide adequate control over descent rates, making them cumbersome and difficult to use in various applications such as rock climbing, rescue operations, and military operations.
Innovation Solution
A compact auto-clamping rope descender with a lever action release mechanism, featuring a rectangular cam with 360-degree wrap, a friction post, and a compound angle lever with a V-groove arrangement, allowing for precise control over descent rates and easy attachment to ropes, enabling both rappelling and lowering functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional rope descender designs are used, then descent control function is achieved, but device size becomes too large for compact personal use
Solution Approach 1:
The cam mechanism is nested within the housing structure, with the cam rotating within a defined space. The lever arm is integrated into the housing, pivoting within the same structure. This nesting allows the descender to maintain compact dimensions while preserving full descent control functionality through the cam-lever mechanism.
Solution Approach 2:
The invention utilizes three-dimensional spatial arrangement of components, positioning the cam, lever arm, and friction surfaces in specific three-dimensional configurations that maximize functional efficiency within minimal volume. The cam's rotational movement in three-dimensional space enables compact design while maintaining effective rope control.
2Ease of operation
If compact design is implemented, then portability is improved, but control precision over descent rate may be reduced
Solution Approach 1:
The lever arm provides dynamic control capability, allowing the user to adjust the cam's rotational position and the friction applied to the rope in real-time. This dynamic mechanism enables precise control of descent rate while maintaining a compact portable design, as the lever can be positioned at various angles to modulate friction force.
Solution Approach 2:
The cam profile is designed with specific geometric parameters that optimize friction characteristics. By carefully selecting the cam's shape, radius, and surface properties, the invention achieves precise descent rate control through parameter optimization rather than increased size. The friction surface parameters are tuned to provide controllable friction within the compact structure.
3Device complexity
If simple mechanism is used, then device complexity is reduced, but versatility for different applications is limited
Solution Approach 1:
The cam-lever mechanism serves multiple functions: it controls descent rate during rappelling, enables controlled lowering of persons or loads, and can function as a progress capture device in ascent systems. This single mechanism design provides versatility across different applications without increasing device complexity, as the same structural elements perform multiple operational roles.
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 device provides a compact, versatile, and durable solution for controlling descent rates, facilitating easy attachment and use, suitable for both rappelling and lowering, while being cost-effective and easy to carry, enhancing operational efficiency in various applications.
Implementation Method 1
If the lever is rotated further, friction is then applied to the rope by the lever forcing the running end rope further into the V-groove thereby providing an additional means of descent control.
Implementation Method 2
A compact auto-clamping rope descender with lever action release or belay for a single person load... comprising a rectangular shaped cam, combined with 360 degrees of wrap around the cam... and the connectivity of the lever to the cam
Data Source
AI summary
Method and Apparatus for a Compact Descender used in conjunction with a rope. The invention includes a first plate and a second plate arranged adjacent to one another and pivotally connected to one another by a rope post at the top ends of the first plate and the second plate. The first plate and the second plate are selectively and pivotally opened and closed and are interlocked when closed by attachment of a carabiner through a hole in the bottom end of the first plate and an adjacent hole in the bottom end of the second plate. The first plate and the second plate include a rope channel adjacent to a lever, where the lever is pivotally attached to a pivot pin affixed to the first plate. A substantially rectangular shaped rope clamping cam is pivotally attached above the lever on the same pivot pin.