Wire Lever Carabiner Bulb Coupling Rope Interference
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Solution Overview
Problem
Carabiners with wire levers face challenges in maintaining resistance to accidental opening under load while preventing interference with the rope during withdrawal, as traditional hook closures can hinder rope extraction.
Innovation Solution
A carabiner design featuring a bulb-shaped coupling portion with a 'key-lock' securing system and a wire lever with a spring closing mechanism, which includes a metal wire lever folded to form a lever with parallel and offset ends, integrated with a coupling member that prevents hook effects and ensures secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hook closure is used to increase opening resistance, then safety against accidental opening is improved, but rope withdrawal is hindered
Solution Approach 1:
The coupling system is divided into two separate components: a bulb-shaped coupling portion on the ring and a complementary coupling head on the lever. This segmentation allows the lever to engage securely with the ring while maintaining a profile that does not interfere with rope withdrawal, resolving the contradiction between opening resistance and ease of operation.
Solution Approach 2:
Instead of using a traditional hook shape that protrudes outward, the invention inverts the approach by using a bulb-shaped coupling portion that engages with a complementary coupling head. This inverted geometry provides secure engagement while eliminating the interference problem that hooks cause during rope withdrawal.
2Reliability
If a wire lever is used to decrease inertial mass, then accidental opening risk is reduced, but the closure must be hook-shaped causing interference
Solution Approach 1:
The coupling system is divided into two separate components: a bulb-shaped coupling portion on the ring and a complementary coupling head on the lever. This segmentation allows the lever to engage securely with the ring while maintaining a profile that does not interfere with rope withdrawal, resolving the contradiction between opening resistance and ease of operation.
Solution Approach 2:
Instead of using a traditional hook shape that protrudes outward, the invention inverts the approach by using a bulb-shaped coupling portion that engages with a complementary coupling head. This inverted geometry provides secure engagement while eliminating the interference problem that hooks cause during rope withdrawal.
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 design enhances resistance to accidental opening while allowing easy rope withdrawal by eliminating the hook effect, maintaining safety and usability during climbing.
Implementation Method 1
a spring closing member (4) that has a closed position in which the closing member (4) closes the ring (2) of the carabiner
Data Source
AI summary
The present invention relates to a carabiner, particularly a wire carabiner, for mountaineering and climbing comprising a ring having a side, which is interrupted by an opening defined by a first and a second end, wherein said opening is closed by a spring closing member that may take an open position and a closed position, wherein the first end of the ring comprises a bulb-shaped coupling portion, with the part projecting in the transversal direction with respect to the plane of the carabiner, and wherein the closing member is of the so-called “wire lever” type and comprises a lever member consisting of a metal wire, wherein said lever member is associated with a coupling member with the coupling portion of the ring, said coupling member comprising a seat, having such shape and dimensions as to couple with said coupling portion, and a constraint portion to the lever member.